t/t4015-diff-whitespace.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2006 Johannes E. Schindelin
   4 #
   5
   6 test_description='Test special whitespace in diff engine.
   7
   8 '
   9 . ./test-lib.sh
  10 . "$TEST_DIRECTORY"/diff-lib.sh
  11
  12 test_expect_success "Ray Lehtiniemi's example" '
  13         cat <<-\EOF >x &&
  14         do {
  15            nothing;
  16         } while (0);
  17         EOF
  18         git update-index --add x &&
  19
  20         cat <<-\EOF >x &&
  21         do
  22         {
  23            nothing;
  24         }
  25         while (0);
  26         EOF
  27
  28         cat <<-\EOF >expect &&
  29         diff --git a/x b/x
  30         index adf3937..6edc172 100644
  31         --- a/x
  32         +++ b/x
  33         @@ -1,3 +1,5 @@
  34         -do {
  35         +do
  36         +{
  37             nothing;
  38         -} while (0);
  39         +}
  40         +while (0);
  41         EOF
  42
  43         git diff >out &&
  44         test_cmp expect out &&
  45
  46         git diff -w >out &&
  47         test_cmp expect out &&
  48
  49         git diff -b >out &&
  50         test_cmp expect out
  51 '
  52
  53 test_expect_success 'another test, without options' '
  54         tr Q "\015" <<-\EOF >x &&
  55         whitespace at beginning
  56         whitespace change
  57         whitespace in the middle
  58         whitespace at end
  59         unchanged line
  60         CR at endQ
  61         EOF
  62
  63         git update-index x &&
  64
  65         tr "_" " " <<-\EOF >x &&
  66         _       whitespace at beginning
  67         whitespace       change
  68         white space in the middle
  69         whitespace at end__
  70         unchanged line
  71         CR at end
  72         EOF
  73
  74         tr "Q_" "\015 " <<-\EOF >expect &&
  75         diff --git a/x b/x
  76         index d99af23..22d9f73 100644
  77         --- a/x
  78         +++ b/x
  79         @@ -1,6 +1,6 @@
  80         -whitespace at beginning
  81         -whitespace change
  82         -whitespace in the middle
  83         -whitespace at end
  84         +       whitespace at beginning
  85         +whitespace      change
  86         +white space in the middle
  87         +whitespace at end__
  88          unchanged line
  89         -CR at endQ
  90         +CR at end
  91         EOF
  92
  93         git diff >out &&
  94         test_cmp expect out &&
  95
  96         git diff -w >out &&
  97         test_must_be_empty out &&
  98
  99         git diff -w -b >out &&
 100         test_must_be_empty out &&
 101
 102         git diff -w --ignore-space-at-eol >out &&
 103         test_must_be_empty out &&
 104
 105         git diff -w -b --ignore-space-at-eol >out &&
 106         test_must_be_empty out &&
 107
 108         git diff -w --ignore-cr-at-eol >out &&
 109         test_must_be_empty out &&
 110
 111         tr "Q_" "\015 " <<-\EOF >expect &&
 112         diff --git a/x b/x
 113         index d99af23..22d9f73 100644
 114         --- a/x
 115         +++ b/x
 116         @@ -1,6 +1,6 @@
 117         -whitespace at beginning
 118         +_      whitespace at beginning
 119          whitespace      change
 120         -whitespace in the middle
 121         +white space in the middle
 122          whitespace at end__
 123          unchanged line
 124          CR at end
 125         EOF
 126         git diff -b >out &&
 127         test_cmp expect out &&
 128
 129         git diff -b --ignore-space-at-eol >out &&
 130         test_cmp expect out &&
 131
 132         git diff -b --ignore-cr-at-eol >out &&
 133         test_cmp expect out &&
 134
 135         tr "Q_" "\015 " <<-\EOF >expect &&
 136         diff --git a/x b/x
 137         index d99af23..22d9f73 100644
 138         --- a/x
 139         +++ b/x
 140         @@ -1,6 +1,6 @@
 141         -whitespace at beginning
 142         -whitespace change
 143         -whitespace in the middle
 144         +_      whitespace at beginning
 145         +whitespace      change
 146         +white space in the middle
 147          whitespace at end__
 148          unchanged line
 149          CR at end
 150         EOF
 151         git diff --ignore-space-at-eol >out &&
 152         test_cmp expect out &&
 153
 154         git diff --ignore-space-at-eol --ignore-cr-at-eol >out &&
 155         test_cmp expect out &&
 156
 157         tr "Q_" "\015 " <<-\EOF >expect &&
 158         diff --git a/x b/x
 159         index_d99af23..22d9f73 100644
 160         --- a/x
 161         +++ b/x
 162         @@ -1,6 +1,6 @@
 163         -whitespace at beginning
 164         -whitespace change
 165         -whitespace in the middle
 166         -whitespace at end
 167         +_      whitespace at beginning
 168         +whitespace_    _change
 169         +white space in the middle
 170         +whitespace at end__
 171          unchanged line
 172          CR at end
 173         EOF
 174         git diff --ignore-cr-at-eol >out &&
 175         test_cmp expect out
 176 '
 177
 178 test_expect_success 'ignore-blank-lines: only new lines' '
 179         test_seq 5 >x &&
 180         git update-index x &&
 181         test_seq 5 | sed "/3/i\\
 182 " >x &&
 183         git diff --ignore-blank-lines >out &&
 184         test_must_be_empty out
 185 '
 186
 187 test_expect_success 'ignore-blank-lines: only new lines with space' '
 188         test_seq 5 >x &&
 189         git update-index x &&
 190         test_seq 5 | sed "/3/i\\
 191  " >x &&
 192         git diff -w --ignore-blank-lines >out &&
 193         test_must_be_empty out
 194 '
 195
 196 test_expect_success 'ignore-blank-lines: after change' '
 197         cat <<-\EOF >x &&
 198         1
 199         2
 200
 201         3
 202         4
 203         5
 204
 205         6
 206         7
 207         EOF
 208         git update-index x &&
 209         cat <<-\EOF >x &&
 210         change
 211
 212         1
 213         2
 214         3
 215         4
 216         5
 217         6
 218
 219         7
 220         EOF
 221         git diff --inter-hunk-context=100 --ignore-blank-lines >out.tmp &&
 222         cat <<-\EOF >expected &&
 223         diff --git a/x b/x
 224         --- a/x
 225         +++ b/x
 226         @@ -1,6 +1,7 @@
 227         +change
 228         +
 229          1
 230          2
 231         -
 232          3
 233          4
 234          5
 235         EOF
 236         compare_diff_patch expected out.tmp
 237 '
 238
 239 test_expect_success 'ignore-blank-lines: before change' '
 240         cat <<-\EOF >x &&
 241         1
 242         2
 243
 244         3
 245         4
 246         5
 247         6
 248         7
 249         EOF
 250         git update-index x &&
 251         cat <<-\EOF >x &&
 252
 253         1
 254         2
 255         3
 256         4
 257         5
 258
 259         6
 260         7
 261         change
 262         EOF
 263         git diff --inter-hunk-context=100 --ignore-blank-lines >out.tmp &&
 264         cat <<-\EOF >expected &&
 265         diff --git a/x b/x
 266         --- a/x
 267         +++ b/x
 268         @@ -4,5 +4,7 @@
 269          3
 270          4
 271          5
 272         +
 273          6
 274          7
 275         +change
 276         EOF
 277         compare_diff_patch expected out.tmp
 278 '
 279
 280 test_expect_success 'ignore-blank-lines: between changes' '
 281         cat <<-\EOF >x &&
 282         1
 283         2
 284         3
 285         4
 286         5
 287
 288
 289         6
 290         7
 291         8
 292         9
 293         10
 294         EOF
 295         git update-index x &&
 296         cat <<-\EOF >x &&
 297         change
 298         1
 299         2
 300
 301         3
 302         4
 303         5
 304         6
 305         7
 306         8
 307
 308         9
 309         10
 310         change
 311         EOF
 312         git diff --ignore-blank-lines >out.tmp &&
 313         cat <<-\EOF >expected &&
 314         diff --git a/x b/x
 315         --- a/x
 316         +++ b/x
 317         @@ -1,5 +1,7 @@
 318         +change
 319          1
 320          2
 321         +
 322          3
 323          4
 324          5
 325         @@ -8,5 +8,7 @@
 326          6
 327          7
 328          8
 329         +
 330          9
 331          10
 332         +change
 333         EOF
 334         compare_diff_patch expected out.tmp
 335 '
 336
 337 test_expect_success 'ignore-blank-lines: between changes (with interhunkctx)' '
 338         test_seq 10 >x &&
 339         git update-index x &&
 340         cat <<-\EOF >x &&
 341         change
 342         1
 343         2
 344
 345         3
 346         4
 347         5
 348
 349         6
 350         7
 351         8
 352         9
 353
 354         10
 355         change
 356         EOF
 357         git diff --inter-hunk-context=2 --ignore-blank-lines >out.tmp &&
 358         cat <<-\EOF >expected &&
 359         diff --git a/x b/x
 360         --- a/x
 361         +++ b/x
 362         @@ -1,10 +1,15 @@
 363         +change
 364          1
 365          2
 366         +
 367          3
 368          4
 369          5
 370         +
 371          6
 372          7
 373          8
 374          9
 375         +
 376          10
 377         +change
 378         EOF
 379         compare_diff_patch expected out.tmp
 380 '
 381
 382 test_expect_success 'ignore-blank-lines: scattered spaces' '
 383         test_seq 10 >x &&
 384         git update-index x &&
 385         cat <<-\EOF >x &&
 386         change
 387         1
 388         2
 389         3
 390
 391         4
 392
 393         5
 394
 395         6
 396
 397
 398         7
 399
 400         8
 401         9
 402         10
 403         change
 404         EOF
 405         git diff --inter-hunk-context=4 --ignore-blank-lines >out.tmp &&
 406         cat <<-\EOF >expected &&
 407         diff --git a/x b/x
 408         --- a/x
 409         +++ b/x
 410         @@ -1,3 +1,4 @@
 411         +change
 412          1
 413          2
 414          3
 415         @@ -8,3 +15,4 @@
 416          8
 417          9
 418          10
 419         +change
 420         EOF
 421         compare_diff_patch expected out.tmp
 422 '
 423
 424 test_expect_success 'ignore-blank-lines: spaces coalesce' '
 425         test_seq 6 >x &&
 426         git update-index x &&
 427         cat <<-\EOF >x &&
 428         change
 429         1
 430         2
 431         3
 432
 433         4
 434
 435         5
 436
 437         6
 438         change
 439         EOF
 440         git diff --inter-hunk-context=4 --ignore-blank-lines >out.tmp &&
 441         cat <<-\EOF >expected &&
 442         diff --git a/x b/x
 443         --- a/x
 444         +++ b/x
 445         @@ -1,6 +1,11 @@
 446         +change
 447          1
 448          2
 449          3
 450         +
 451          4
 452         +
 453          5
 454         +
 455          6
 456         +change
 457         EOF
 458         compare_diff_patch expected out.tmp
 459 '
 460
 461 test_expect_success 'ignore-blank-lines: mix changes and blank lines' '
 462         test_seq 16 >x &&
 463         git update-index x &&
 464         cat <<-\EOF >x &&
 465         change
 466         1
 467         2
 468
 469         3
 470         4
 471         5
 472         change
 473         6
 474         7
 475         8
 476
 477         9
 478         10
 479         11
 480         change
 481         12
 482         13
 483         14
 484
 485         15
 486         16
 487         change
 488         EOF
 489         git diff --ignore-blank-lines >out.tmp &&
 490         cat <<-\EOF >expected &&
 491         diff --git a/x b/x
 492         --- a/x
 493         +++ b/x
 494         @@ -1,8 +1,11 @@
 495         +change
 496          1
 497          2
 498         +
 499          3
 500          4
 501          5
 502         +change
 503          6
 504          7
 505          8
 506         @@ -9,8 +13,11 @@
 507          9
 508          10
 509          11
 510         +change
 511          12
 512          13
 513          14
 514         +
 515          15
 516          16
 517         +change
 518         EOF
 519         compare_diff_patch expected out.tmp
 520 '
 521
 522 test_expect_success 'check mixed spaces and tabs in indent' '
 523         # This is indented with SP HT SP.
 524         echo "   foo();" >x &&
 525         git diff --check | grep "space before tab in indent"
 526 '
 527
 528 test_expect_success 'check mixed tabs and spaces in indent' '
 529         # This is indented with HT SP HT.
 530         echo "          foo();" >x &&
 531         git diff --check | grep "space before tab in indent"
 532 '
 533
 534 test_expect_success 'check with no whitespace errors' '
 535         git commit -m "snapshot" &&
 536         echo "foo();" >x &&
 537         git diff --check
 538 '
 539
 540 test_expect_success 'check with trailing whitespace' '
 541         echo "foo(); " >x &&
 542         test_must_fail git diff --check
 543 '
 544
 545 test_expect_success 'check with space before tab in indent' '
 546         # indent has space followed by hard tab
 547         echo "  foo();" >x &&
 548         test_must_fail git diff --check
 549 '
 550
 551 test_expect_success '--check and --exit-code are not exclusive' '
 552         git checkout x &&
 553         git diff --check --exit-code
 554 '
 555
 556 test_expect_success '--check and --quiet are not exclusive' '
 557         git diff --check --quiet
 558 '
 559
 560 test_expect_success 'check staged with no whitespace errors' '
 561         echo "foo();" >x &&
 562         git add x &&
 563         git diff --cached --check
 564 '
 565
 566 test_expect_success 'check staged with trailing whitespace' '
 567         echo "foo(); " >x &&
 568         git add x &&
 569         test_must_fail git diff --cached --check
 570 '
 571
 572 test_expect_success 'check staged with space before tab in indent' '
 573         # indent has space followed by hard tab
 574         echo "  foo();" >x &&
 575         git add x &&
 576         test_must_fail git diff --cached --check
 577 '
 578
 579 test_expect_success 'check with no whitespace errors (diff-index)' '
 580         echo "foo();" >x &&
 581         git add x &&
 582         git diff-index --check HEAD
 583 '
 584
 585 test_expect_success 'check with trailing whitespace (diff-index)' '
 586         echo "foo(); " >x &&
 587         git add x &&
 588         test_must_fail git diff-index --check HEAD
 589 '
 590
 591 test_expect_success 'check with space before tab in indent (diff-index)' '
 592         # indent has space followed by hard tab
 593         echo "  foo();" >x &&
 594         git add x &&
 595         test_must_fail git diff-index --check HEAD
 596 '
 597
 598 test_expect_success 'check staged with no whitespace errors (diff-index)' '
 599         echo "foo();" >x &&
 600         git add x &&
 601         git diff-index --cached --check HEAD
 602 '
 603
 604 test_expect_success 'check staged with trailing whitespace (diff-index)' '
 605         echo "foo(); " >x &&
 606         git add x &&
 607         test_must_fail git diff-index --cached --check HEAD
 608 '
 609
 610 test_expect_success 'check staged with space before tab in indent (diff-index)' '
 611         # indent has space followed by hard tab
 612         echo "  foo();" >x &&
 613         git add x &&
 614         test_must_fail git diff-index --cached --check HEAD
 615 '
 616
 617 test_expect_success 'check with no whitespace errors (diff-tree)' '
 618         echo "foo();" >x &&
 619         git commit -m "new commit" x &&
 620         git diff-tree --check HEAD^ HEAD
 621 '
 622
 623 test_expect_success 'check with trailing whitespace (diff-tree)' '
 624         echo "foo(); " >x &&
 625         git commit -m "another commit" x &&
 626         test_must_fail git diff-tree --check HEAD^ HEAD
 627 '
 628
 629 test_expect_success 'check with space before tab in indent (diff-tree)' '
 630         # indent has space followed by hard tab
 631         echo "  foo();" >x &&
 632         git commit -m "yet another" x &&
 633         test_must_fail git diff-tree --check HEAD^ HEAD
 634 '
 635
 636 test_expect_success 'check with ignored trailing whitespace attr (diff-tree)' '
 637         test_when_finished "git reset --hard HEAD^" &&
 638
 639         # create a whitespace error that should be ignored
 640         echo "* -whitespace" >.gitattributes &&
 641         git add .gitattributes &&
 642         echo "foo(); " >x &&
 643         git add x &&
 644         git commit -m "add trailing space" &&
 645
 646         # with a worktree diff-tree ignores the whitespace error
 647         git diff-tree --root --check HEAD &&
 648
 649         # without a worktree diff-tree still ignores the whitespace error
 650         git -C .git diff-tree --root --check HEAD
 651 '
 652
 653 test_expect_success 'check trailing whitespace (trailing-space: off)' '
 654         git config core.whitespace "-trailing-space" &&
 655         echo "foo ();   " >x &&
 656         git diff --check
 657 '
 658
 659 test_expect_success 'check trailing whitespace (trailing-space: on)' '
 660         git config core.whitespace "trailing-space" &&
 661         echo "foo ();   " >x &&
 662         test_must_fail git diff --check
 663 '
 664
 665 test_expect_success 'check space before tab in indent (space-before-tab: off)' '
 666         # indent contains space followed by HT
 667         git config core.whitespace "-space-before-tab" &&
 668         echo "  foo ();" >x &&
 669         git diff --check
 670 '
 671
 672 test_expect_success 'check space before tab in indent (space-before-tab: on)' '
 673         # indent contains space followed by HT
 674         git config core.whitespace "space-before-tab" &&
 675         echo "  foo ();   " >x &&
 676         test_must_fail git diff --check
 677 '
 678
 679 test_expect_success 'check spaces as indentation (indent-with-non-tab: off)' '
 680         git config core.whitespace "-indent-with-non-tab" &&
 681         echo "        foo ();" >x &&
 682         git diff --check
 683 '
 684
 685 test_expect_success 'check spaces as indentation (indent-with-non-tab: on)' '
 686         git config core.whitespace "indent-with-non-tab" &&
 687         echo "        foo ();" >x &&
 688         test_must_fail git diff --check
 689 '
 690
 691 test_expect_success 'ditto, but tabwidth=9' '
 692         git config core.whitespace "indent-with-non-tab,tabwidth=9" &&
 693         git diff --check
 694 '
 695
 696 test_expect_success 'check tabs and spaces as indentation (indent-with-non-tab: on)' '
 697         git config core.whitespace "indent-with-non-tab" &&
 698         echo "                  foo ();" >x &&
 699         test_must_fail git diff --check
 700 '
 701
 702 test_expect_success 'ditto, but tabwidth=10' '
 703         git config core.whitespace "indent-with-non-tab,tabwidth=10" &&
 704         test_must_fail git diff --check
 705 '
 706
 707 test_expect_success 'ditto, but tabwidth=20' '
 708         git config core.whitespace "indent-with-non-tab,tabwidth=20" &&
 709         git diff --check
 710 '
 711
 712 test_expect_success 'check tabs as indentation (tab-in-indent: off)' '
 713         git config core.whitespace "-tab-in-indent" &&
 714         echo "  foo ();" >x &&
 715         git diff --check
 716 '
 717
 718 test_expect_success 'check tabs as indentation (tab-in-indent: on)' '
 719         git config core.whitespace "tab-in-indent" &&
 720         echo "  foo ();" >x &&
 721         test_must_fail git diff --check
 722 '
 723
 724 test_expect_success 'check tabs and spaces as indentation (tab-in-indent: on)' '
 725         git config core.whitespace "tab-in-indent" &&
 726         echo "                  foo ();" >x &&
 727         test_must_fail git diff --check
 728 '
 729
 730 test_expect_success 'ditto, but tabwidth=1 (must be irrelevant)' '
 731         git config core.whitespace "tab-in-indent,tabwidth=1" &&
 732         test_must_fail git diff --check
 733 '
 734
 735 test_expect_success 'check tab-in-indent and indent-with-non-tab conflict' '
 736         git config core.whitespace "tab-in-indent,indent-with-non-tab" &&
 737         echo "foo ();" >x &&
 738         test_must_fail git diff --check
 739 '
 740
 741 test_expect_success 'check tab-in-indent excluded from wildcard whitespace attribute' '
 742         git config --unset core.whitespace &&
 743         echo "x whitespace" >.gitattributes &&
 744         echo "    foo ();" >x &&
 745         git diff --check &&
 746         rm -f .gitattributes
 747 '
 748
 749 test_expect_success 'line numbers in --check output are correct' '
 750         echo "" >x &&
 751         echo "foo(); " >>x &&
 752         git diff --check | grep "x:2:"
 753 '
 754
 755 test_expect_success 'checkdiff detects new trailing blank lines (1)' '
 756         echo "foo();" >x &&
 757         echo "" >>x &&
 758         git diff --check | grep "new blank line"
 759 '
 760
 761 test_expect_success 'checkdiff detects new trailing blank lines (2)' '
 762         { echo a; echo b; echo; echo; } >x &&
 763         git add x &&
 764         { echo a; echo; echo; echo; echo; } >x &&
 765         git diff --check | grep "new blank line"
 766 '
 767
 768 test_expect_success 'checkdiff allows new blank lines' '
 769         git checkout x &&
 770         mv x y &&
 771         (
 772                 echo "/* This is new */" &&
 773                 echo "" &&
 774                 cat y
 775         ) >x &&
 776         git diff --check
 777 '
 778
 779 test_expect_success 'whitespace-only changes not reported' '
 780         git reset --hard &&
 781         echo >x "hello world" &&
 782         git add x &&
 783         git commit -m "hello 1" &&
 784         echo >x "hello  world" &&
 785         git diff -b >actual &&
 786         test_must_be_empty actual
 787 '
 788
 789 cat <<EOF >expect
 790 diff --git a/x b/z
 791 similarity index NUM%
 792 rename from x
 793 rename to z
 794 index 380c32a..a97b785 100644
 795 EOF
 796 test_expect_success 'whitespace-only changes reported across renames' '
 797         git reset --hard &&
 798         for i in 1 2 3 4 5 6 7 8 9; do echo "$i$i$i$i$i$i"; done >x &&
 799         git add x &&
 800         git commit -m "base" &&
 801         sed -e "5s/^/ /" x >z &&
 802         git rm x &&
 803         git add z &&
 804         git diff -w -M --cached |
 805         sed -e "/^similarity index /s/[0-9][0-9]*/NUM/" >actual &&
 806         test_cmp expect actual
 807 '
 808
 809 cat >expected <<\EOF
 810 diff --git a/empty b/void
 811 similarity index 100%
 812 rename from empty
 813 rename to void
 814 EOF
 815
 816 test_expect_success 'rename empty' '
 817         git reset --hard &&
 818         >empty &&
 819         git add empty &&
 820         git commit -m empty &&
 821         git mv empty void &&
 822         git diff -w --cached -M >current &&
 823         test_cmp expected current
 824 '
 825
 826 test_expect_success 'combined diff with autocrlf conversion' '
 827
 828         git reset --hard &&
 829         echo >x hello &&
 830         git commit -m "one side" x &&
 831         git checkout HEAD^ &&
 832         echo >x goodbye &&
 833         git commit -m "the other side" x &&
 834         git config core.autocrlf true &&
 835         test_must_fail git merge master &&
 836
 837         git diff | sed -e "1,/^@@@/d" >actual &&
 838         ! grep "^-" actual
 839
 840 '
 841
 842 # Start testing the colored format for whitespace checks
 843
 844 test_expect_success 'setup diff colors' '
 845         git config color.diff.plain normal &&
 846         git config color.diff.meta bold &&
 847         git config color.diff.frag cyan &&
 848         git config color.diff.func normal &&
 849         git config color.diff.old red &&
 850         git config color.diff.new green &&
 851         git config color.diff.commit yellow &&
 852         git config color.diff.whitespace blue &&
 853
 854         git config core.autocrlf false
 855 '
 856
 857 test_expect_success 'diff that introduces a line with only tabs' '
 858         git config core.whitespace blank-at-eol &&
 859         git reset --hard &&
 860         echo "test" >x &&
 861         git commit -m "initial" x &&
 862         echo "{NTN}" | tr "NT" "\n\t" >>x &&
 863         git diff --color | test_decode_color >current &&
 864
 865         cat >expected <<-\EOF &&
 866         <BOLD>diff --git a/x b/x<RESET>
 867         <BOLD>index 9daeafb..2874b91 100644<RESET>
 868         <BOLD>--- a/x<RESET>
 869         <BOLD>+++ b/x<RESET>
 870         <CYAN>@@ -1 +1,4 @@<RESET>
 871          test<RESET>
 872         <GREEN>+<RESET><GREEN>{<RESET>
 873         <GREEN>+<RESET><BLUE>   <RESET>
 874         <GREEN>+<RESET><GREEN>}<RESET>
 875         EOF
 876
 877         test_cmp expected current
 878 '
 879
 880 test_expect_success 'diff that introduces and removes ws breakages' '
 881         git reset --hard &&
 882         {
 883                 echo "0. blank-at-eol " &&
 884                 echo "1. blank-at-eol "
 885         } >x &&
 886         git commit -a --allow-empty -m preimage &&
 887         {
 888                 echo "0. blank-at-eol " &&
 889                 echo "1. still-blank-at-eol " &&
 890                 echo "2. and a new line "
 891         } >x &&
 892
 893         git diff --color |
 894         test_decode_color >current &&
 895
 896         cat >expected <<-\EOF &&
 897         <BOLD>diff --git a/x b/x<RESET>
 898         <BOLD>index d0233a2..700886e 100644<RESET>
 899         <BOLD>--- a/x<RESET>
 900         <BOLD>+++ b/x<RESET>
 901         <CYAN>@@ -1,2 +1,3 @@<RESET>
 902          0. blank-at-eol <RESET>
 903         <RED>-1. blank-at-eol <RESET>
 904         <GREEN>+<RESET><GREEN>1. still-blank-at-eol<RESET><BLUE> <RESET>
 905         <GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
 906         EOF
 907
 908         test_cmp expected current
 909 '
 910
 911 test_expect_success 'ws-error-highlight test setup' '
 912
 913         git reset --hard &&
 914         {
 915                 echo "0. blank-at-eol " &&
 916                 echo "1. blank-at-eol "
 917         } >x &&
 918         git commit -a --allow-empty -m preimage &&
 919         {
 920                 echo "0. blank-at-eol " &&
 921                 echo "1. still-blank-at-eol " &&
 922                 echo "2. and a new line "
 923         } >x &&
 924
 925         cat >expect.default-old <<-\EOF &&
 926         <BOLD>diff --git a/x b/x<RESET>
 927         <BOLD>index d0233a2..700886e 100644<RESET>
 928         <BOLD>--- a/x<RESET>
 929         <BOLD>+++ b/x<RESET>
 930         <CYAN>@@ -1,2 +1,3 @@<RESET>
 931          0. blank-at-eol <RESET>
 932         <RED>-<RESET><RED>1. blank-at-eol<RESET><BLUE> <RESET>
 933         <GREEN>+<RESET><GREEN>1. still-blank-at-eol<RESET><BLUE> <RESET>
 934         <GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
 935         EOF
 936
 937         cat >expect.all <<-\EOF &&
 938         <BOLD>diff --git a/x b/x<RESET>
 939         <BOLD>index d0233a2..700886e 100644<RESET>
 940         <BOLD>--- a/x<RESET>
 941         <BOLD>+++ b/x<RESET>
 942         <CYAN>@@ -1,2 +1,3 @@<RESET>
 943          <RESET>0. blank-at-eol<RESET><BLUE> <RESET>
 944         <RED>-<RESET><RED>1. blank-at-eol<RESET><BLUE> <RESET>
 945         <GREEN>+<RESET><GREEN>1. still-blank-at-eol<RESET><BLUE> <RESET>
 946         <GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
 947         EOF
 948
 949         cat >expect.none <<-\EOF
 950         <BOLD>diff --git a/x b/x<RESET>
 951         <BOLD>index d0233a2..700886e 100644<RESET>
 952         <BOLD>--- a/x<RESET>
 953         <BOLD>+++ b/x<RESET>
 954         <CYAN>@@ -1,2 +1,3 @@<RESET>
 955          0. blank-at-eol <RESET>
 956         <RED>-1. blank-at-eol <RESET>
 957         <GREEN>+1. still-blank-at-eol <RESET>
 958         <GREEN>+2. and a new line <RESET>
 959         EOF
 960
 961 '
 962
 963 test_expect_success 'test --ws-error-highlight option' '
 964
 965         git diff --color --ws-error-highlight=default,old |
 966         test_decode_color >current &&
 967         test_cmp expect.default-old current &&
 968
 969         git diff --color --ws-error-highlight=all |
 970         test_decode_color >current &&
 971         test_cmp expect.all current &&
 972
 973         git diff --color --ws-error-highlight=none |
 974         test_decode_color >current &&
 975         test_cmp expect.none current
 976
 977 '
 978
 979 test_expect_success 'test diff.wsErrorHighlight config' '
 980
 981         git -c diff.wsErrorHighlight=default,old diff --color |
 982         test_decode_color >current &&
 983         test_cmp expect.default-old current &&
 984
 985         git -c diff.wsErrorHighlight=all diff --color |
 986         test_decode_color >current &&
 987         test_cmp expect.all current &&
 988
 989         git -c diff.wsErrorHighlight=none diff --color |
 990         test_decode_color >current &&
 991         test_cmp expect.none current
 992
 993 '
 994
 995 test_expect_success 'option overrides diff.wsErrorHighlight' '
 996
 997         git -c diff.wsErrorHighlight=none \
 998                 diff --color --ws-error-highlight=default,old |
 999         test_decode_color >current &&
1000         test_cmp expect.default-old current &&
1001
1002         git -c diff.wsErrorHighlight=default \
1003                 diff --color --ws-error-highlight=all |
1004         test_decode_color >current &&
1005         test_cmp expect.all current &&
1006
1007         git -c diff.wsErrorHighlight=all \
1008                 diff --color --ws-error-highlight=none |
1009         test_decode_color >current &&
1010         test_cmp expect.none current
1011
1012 '
1013
1014 test_expect_success 'detect moved code, complete file' '
1015         git reset --hard &&
1016         cat <<-\EOF >test.c &&
1017         #include<stdio.h>
1018         main()
1019         {
1020         printf("Hello World");
1021         }
1022         EOF
1023         git add test.c &&
1024         git commit -m "add main function" &&
1025         git mv test.c main.c &&
1026         test_config color.diff.oldMoved "normal red" &&
1027         test_config color.diff.newMoved "normal green" &&
1028         git diff HEAD --color-moved=zebra --color --no-renames | test_decode_color >actual &&
1029         cat >expected <<-\EOF &&
1030         <BOLD>diff --git a/main.c b/main.c<RESET>
1031         <BOLD>new file mode 100644<RESET>
1032         <BOLD>index 0000000..a986c57<RESET>
1033         <BOLD>--- /dev/null<RESET>
1034         <BOLD>+++ b/main.c<RESET>
1035         <CYAN>@@ -0,0 +1,5 @@<RESET>
1036         <BGREEN>+<RESET><BGREEN>#include<stdio.h><RESET>
1037         <BGREEN>+<RESET><BGREEN>main()<RESET>
1038         <BGREEN>+<RESET><BGREEN>{<RESET>
1039         <BGREEN>+<RESET><BGREEN>printf("Hello World");<RESET>
1040         <BGREEN>+<RESET><BGREEN>}<RESET>
1041         <BOLD>diff --git a/test.c b/test.c<RESET>
1042         <BOLD>deleted file mode 100644<RESET>
1043         <BOLD>index a986c57..0000000<RESET>
1044         <BOLD>--- a/test.c<RESET>
1045         <BOLD>+++ /dev/null<RESET>
1046         <CYAN>@@ -1,5 +0,0 @@<RESET>
1047         <BRED>-#include<stdio.h><RESET>
1048         <BRED>-main()<RESET>
1049         <BRED>-{<RESET>
1050         <BRED>-printf("Hello World");<RESET>
1051         <BRED>-}<RESET>
1052         EOF
1053
1054         test_cmp expected actual
1055 '
1056
1057 test_expect_success 'detect malicious moved code, inside file' '
1058         test_config color.diff.oldMoved "normal red" &&
1059         test_config color.diff.newMoved "normal green" &&
1060         test_config color.diff.oldMovedAlternative "blue" &&
1061         test_config color.diff.newMovedAlternative "yellow" &&
1062         git reset --hard &&
1063         cat <<-\EOF >main.c &&
1064                 #include<stdio.h>
1065                 int stuff()
1066                 {
1067                         printf("Hello ");
1068                         printf("World\n");
1069                 }
1070
1071                 int secure_foo(struct user *u)
1072                 {
1073                         if (!u->is_allowed_foo)
1074                                 return;
1075                         foo(u);
1076                 }
1077
1078                 int main()
1079                 {
1080                         foo();
1081                 }
1082         EOF
1083         cat <<-\EOF >test.c &&
1084                 #include<stdio.h>
1085                 int bar()
1086                 {
1087                         printf("Hello World, but different\n");
1088                 }
1089
1090                 int another_function()
1091                 {
1092                         bar();
1093                 }
1094         EOF
1095         git add main.c test.c &&
1096         git commit -m "add main and test file" &&
1097         cat <<-\EOF >main.c &&
1098                 #include<stdio.h>
1099                 int stuff()
1100                 {
1101                         printf("Hello ");
1102                         printf("World\n");
1103                 }
1104
1105                 int main()
1106                 {
1107                         foo();
1108                 }
1109         EOF
1110         cat <<-\EOF >test.c &&
1111                 #include<stdio.h>
1112                 int bar()
1113                 {
1114                         printf("Hello World, but different\n");
1115                 }
1116
1117                 int secure_foo(struct user *u)
1118                 {
1119                         foo(u);
1120                         if (!u->is_allowed_foo)
1121                                 return;
1122                 }
1123
1124                 int another_function()
1125                 {
1126                         bar();
1127                 }
1128         EOF
1129         git diff HEAD --no-renames --color-moved=zebra --color | test_decode_color >actual &&
1130         cat <<-\EOF >expected &&
1131         <BOLD>diff --git a/main.c b/main.c<RESET>
1132         <BOLD>index 27a619c..7cf9336 100644<RESET>
1133         <BOLD>--- a/main.c<RESET>
1134         <BOLD>+++ b/main.c<RESET>
1135         <CYAN>@@ -5,13 +5,6 @@<RESET> <RESET>printf("Hello ");<RESET>
1136          printf("World\n");<RESET>
1137          }<RESET>
1138          <RESET>
1139         <BRED>-int secure_foo(struct user *u)<RESET>
1140         <BRED>-{<RESET>
1141         <BLUE>-if (!u->is_allowed_foo)<RESET>
1142         <BLUE>-return;<RESET>
1143         <RED>-foo(u);<RESET>
1144         <RED>-}<RESET>
1145         <RED>-<RESET>
1146          int main()<RESET>
1147          {<RESET>
1148          foo();<RESET>
1149         <BOLD>diff --git a/test.c b/test.c<RESET>
1150         <BOLD>index 1dc1d85..2bedec9 100644<RESET>
1151         <BOLD>--- a/test.c<RESET>
1152         <BOLD>+++ b/test.c<RESET>
1153         <CYAN>@@ -4,6 +4,13 @@<RESET> <RESET>int bar()<RESET>
1154          printf("Hello World, but different\n");<RESET>
1155          }<RESET>
1156          <RESET>
1157         <BGREEN>+<RESET><BGREEN>int secure_foo(struct user *u)<RESET>
1158         <BGREEN>+<RESET><BGREEN>{<RESET>
1159         <GREEN>+<RESET><GREEN>foo(u);<RESET>
1160         <BGREEN>+<RESET><BGREEN>if (!u->is_allowed_foo)<RESET>
1161         <BGREEN>+<RESET><BGREEN>return;<RESET>
1162         <GREEN>+<RESET><GREEN>}<RESET>
1163         <GREEN>+<RESET>
1164          int another_function()<RESET>
1165          {<RESET>
1166          bar();<RESET>
1167         EOF
1168
1169         test_cmp expected actual
1170 '
1171
1172 test_expect_success 'plain moved code, inside file' '
1173         test_config color.diff.oldMoved "normal red" &&
1174         test_config color.diff.newMoved "normal green" &&
1175         test_config color.diff.oldMovedAlternative "blue" &&
1176         test_config color.diff.newMovedAlternative "yellow" &&
1177         # needs previous test as setup
1178         git diff HEAD --no-renames --color-moved=plain --color | test_decode_color >actual &&
1179         cat <<-\EOF >expected &&
1180         <BOLD>diff --git a/main.c b/main.c<RESET>
1181         <BOLD>index 27a619c..7cf9336 100644<RESET>
1182         <BOLD>--- a/main.c<RESET>
1183         <BOLD>+++ b/main.c<RESET>
1184         <CYAN>@@ -5,13 +5,6 @@<RESET> <RESET>printf("Hello ");<RESET>
1185          printf("World\n");<RESET>
1186          }<RESET>
1187          <RESET>
1188         <BRED>-int secure_foo(struct user *u)<RESET>
1189         <BRED>-{<RESET>
1190         <BRED>-if (!u->is_allowed_foo)<RESET>
1191         <BRED>-return;<RESET>
1192         <BRED>-foo(u);<RESET>
1193         <BRED>-}<RESET>
1194         <BRED>-<RESET>
1195          int main()<RESET>
1196          {<RESET>
1197          foo();<RESET>
1198         <BOLD>diff --git a/test.c b/test.c<RESET>
1199         <BOLD>index 1dc1d85..2bedec9 100644<RESET>
1200         <BOLD>--- a/test.c<RESET>
1201         <BOLD>+++ b/test.c<RESET>
1202         <CYAN>@@ -4,6 +4,13 @@<RESET> <RESET>int bar()<RESET>
1203          printf("Hello World, but different\n");<RESET>
1204          }<RESET>
1205          <RESET>
1206         <BGREEN>+<RESET><BGREEN>int secure_foo(struct user *u)<RESET>
1207         <BGREEN>+<RESET><BGREEN>{<RESET>
1208         <BGREEN>+<RESET><BGREEN>foo(u);<RESET>
1209         <BGREEN>+<RESET><BGREEN>if (!u->is_allowed_foo)<RESET>
1210         <BGREEN>+<RESET><BGREEN>return;<RESET>
1211         <BGREEN>+<RESET><BGREEN>}<RESET>
1212         <BGREEN>+<RESET>
1213          int another_function()<RESET>
1214          {<RESET>
1215          bar();<RESET>
1216         EOF
1217
1218         test_cmp expected actual
1219 '
1220
1221 test_expect_success 'detect blocks of moved code' '
1222         git reset --hard &&
1223         cat <<-\EOF >lines.txt &&
1224                 long line 1
1225                 long line 2
1226                 long line 3
1227                 line 4
1228                 line 5
1229                 line 6
1230                 line 7
1231                 line 8
1232                 line 9
1233                 line 10
1234                 line 11
1235                 line 12
1236                 line 13
1237                 long line 14
1238                 long line 15
1239                 long line 16
1240         EOF
1241         git add lines.txt &&
1242         git commit -m "add poetry" &&
1243         cat <<-\EOF >lines.txt &&
1244                 line 4
1245                 line 5
1246                 line 6
1247                 line 7
1248                 line 8
1249                 line 9
1250                 long line 1
1251                 long line 2
1252                 long line 3
1253                 long line 14
1254                 long line 15
1255                 long line 16
1256                 line 10
1257                 line 11
1258                 line 12
1259                 line 13
1260         EOF
1261         test_config color.diff.oldMoved "magenta" &&
1262         test_config color.diff.newMoved "cyan" &&
1263         test_config color.diff.oldMovedAlternative "blue" &&
1264         test_config color.diff.newMovedAlternative "yellow" &&
1265         test_config color.diff.oldMovedDimmed "normal magenta" &&
1266         test_config color.diff.newMovedDimmed "normal cyan" &&
1267         test_config color.diff.oldMovedAlternativeDimmed "normal blue" &&
1268         test_config color.diff.newMovedAlternativeDimmed "normal yellow" &&
1269         git diff HEAD --no-renames --color-moved=blocks --color >actual.raw &&
1270         grep -v "index" actual.raw | test_decode_color >actual &&
1271         cat <<-\EOF >expected &&
1272         <BOLD>diff --git a/lines.txt b/lines.txt<RESET>
1273         <BOLD>--- a/lines.txt<RESET>
1274         <BOLD>+++ b/lines.txt<RESET>
1275         <CYAN>@@ -1,16 +1,16 @@<RESET>
1276         <MAGENTA>-long line 1<RESET>
1277         <MAGENTA>-long line 2<RESET>
1278         <MAGENTA>-long line 3<RESET>
1279          line 4<RESET>
1280          line 5<RESET>
1281          line 6<RESET>
1282          line 7<RESET>
1283          line 8<RESET>
1284          line 9<RESET>
1285         <CYAN>+<RESET><CYAN>long line 1<RESET>
1286         <CYAN>+<RESET><CYAN>long line 2<RESET>
1287         <CYAN>+<RESET><CYAN>long line 3<RESET>
1288         <CYAN>+<RESET><CYAN>long line 14<RESET>
1289         <CYAN>+<RESET><CYAN>long line 15<RESET>
1290         <CYAN>+<RESET><CYAN>long line 16<RESET>
1291          line 10<RESET>
1292          line 11<RESET>
1293          line 12<RESET>
1294          line 13<RESET>
1295         <MAGENTA>-long line 14<RESET>
1296         <MAGENTA>-long line 15<RESET>
1297         <MAGENTA>-long line 16<RESET>
1298         EOF
1299         test_cmp expected actual
1300
1301 '
1302
1303 test_expect_success 'detect permutations inside moved code -- dimmed-zebra' '
1304         # reuse setup from test before!
1305         test_config color.diff.oldMoved "magenta" &&
1306         test_config color.diff.newMoved "cyan" &&
1307         test_config color.diff.oldMovedAlternative "blue" &&
1308         test_config color.diff.newMovedAlternative "yellow" &&
1309         test_config color.diff.oldMovedDimmed "normal magenta" &&
1310         test_config color.diff.newMovedDimmed "normal cyan" &&
1311         test_config color.diff.oldMovedAlternativeDimmed "normal blue" &&
1312         test_config color.diff.newMovedAlternativeDimmed "normal yellow" &&
1313         git diff HEAD --no-renames --color-moved=dimmed-zebra --color >actual.raw &&
1314         grep -v "index" actual.raw | test_decode_color >actual &&
1315         cat <<-\EOF >expected &&
1316         <BOLD>diff --git a/lines.txt b/lines.txt<RESET>
1317         <BOLD>--- a/lines.txt<RESET>
1318         <BOLD>+++ b/lines.txt<RESET>
1319         <CYAN>@@ -1,16 +1,16 @@<RESET>
1320         <BMAGENTA>-long line 1<RESET>
1321         <BMAGENTA>-long line 2<RESET>
1322         <BMAGENTA>-long line 3<RESET>
1323          line 4<RESET>
1324          line 5<RESET>
1325          line 6<RESET>
1326          line 7<RESET>
1327          line 8<RESET>
1328          line 9<RESET>
1329         <BCYAN>+<RESET><BCYAN>long line 1<RESET>
1330         <BCYAN>+<RESET><BCYAN>long line 2<RESET>
1331         <CYAN>+<RESET><CYAN>long line 3<RESET>
1332         <YELLOW>+<RESET><YELLOW>long line 14<RESET>
1333         <BYELLOW>+<RESET><BYELLOW>long line 15<RESET>
1334         <BYELLOW>+<RESET><BYELLOW>long line 16<RESET>
1335          line 10<RESET>
1336          line 11<RESET>
1337          line 12<RESET>
1338          line 13<RESET>
1339         <BMAGENTA>-long line 14<RESET>
1340         <BMAGENTA>-long line 15<RESET>
1341         <BMAGENTA>-long line 16<RESET>
1342         EOF
1343         test_cmp expected actual
1344 '
1345
1346 test_expect_success 'cmd option assumes configured colored-moved' '
1347         test_config color.diff.oldMoved "magenta" &&
1348         test_config color.diff.newMoved "cyan" &&
1349         test_config color.diff.oldMovedAlternative "blue" &&
1350         test_config color.diff.newMovedAlternative "yellow" &&
1351         test_config color.diff.oldMovedDimmed "normal magenta" &&
1352         test_config color.diff.newMovedDimmed "normal cyan" &&
1353         test_config color.diff.oldMovedAlternativeDimmed "normal blue" &&
1354         test_config color.diff.newMovedAlternativeDimmed "normal yellow" &&
1355         test_config diff.colorMoved zebra &&
1356         git diff HEAD --no-renames --color-moved --color >actual.raw &&
1357         grep -v "index" actual.raw | test_decode_color >actual &&
1358         cat <<-\EOF >expected &&
1359         <BOLD>diff --git a/lines.txt b/lines.txt<RESET>
1360         <BOLD>--- a/lines.txt<RESET>
1361         <BOLD>+++ b/lines.txt<RESET>
1362         <CYAN>@@ -1,16 +1,16 @@<RESET>
1363         <MAGENTA>-long line 1<RESET>
1364         <MAGENTA>-long line 2<RESET>
1365         <MAGENTA>-long line 3<RESET>
1366          line 4<RESET>
1367          line 5<RESET>
1368          line 6<RESET>
1369          line 7<RESET>
1370          line 8<RESET>
1371          line 9<RESET>
1372         <CYAN>+<RESET><CYAN>long line 1<RESET>
1373         <CYAN>+<RESET><CYAN>long line 2<RESET>
1374         <CYAN>+<RESET><CYAN>long line 3<RESET>
1375         <YELLOW>+<RESET><YELLOW>long line 14<RESET>
1376         <YELLOW>+<RESET><YELLOW>long line 15<RESET>
1377         <YELLOW>+<RESET><YELLOW>long line 16<RESET>
1378          line 10<RESET>
1379          line 11<RESET>
1380          line 12<RESET>
1381          line 13<RESET>
1382         <MAGENTA>-long line 14<RESET>
1383         <MAGENTA>-long line 15<RESET>
1384         <MAGENTA>-long line 16<RESET>
1385         EOF
1386         test_cmp expected actual
1387 '
1388
1389 test_expect_success 'no effect from --color-moved with --word-diff' '
1390         cat <<-\EOF >text.txt &&
1391         Lorem Ipsum is simply dummy text of the printing and typesetting industry.
1392         EOF
1393         git add text.txt &&
1394         git commit -a -m "clean state" &&
1395         cat <<-\EOF >text.txt &&
1396         simply Lorem Ipsum dummy is text of the typesetting and printing industry.
1397         EOF
1398         git diff --color-moved --word-diff >actual &&
1399         git diff --word-diff >expect &&
1400         test_cmp expect actual
1401 '
1402
1403 test_expect_success 'set up whitespace tests' '
1404         git reset --hard &&
1405         # Note that these lines have no leading or trailing whitespace.
1406         cat <<-\EOF >lines.txt &&
1407         line 1
1408         line 2
1409         line 3
1410         line 4
1411         line 5
1412         long line 6
1413         long line 7
1414         long line 8
1415         long line 9
1416         EOF
1417         git add lines.txt &&
1418         git commit -m "add poetry" &&
1419         git config color.diff.oldMoved "magenta" &&
1420         git config color.diff.newMoved "cyan"
1421 '
1422
1423 test_expect_success 'move detection ignoring whitespace ' '
1424         q_to_tab <<-\EOF >lines.txt &&
1425         Qlong line 6
1426         Qlong line 7
1427         Qlong line 8
1428         Qchanged long line 9
1429         line 1
1430         line 2
1431         line 3
1432         line 4
1433         line 5
1434         EOF
1435         git diff HEAD --no-renames --color-moved --color >actual.raw &&
1436         grep -v "index" actual.raw | test_decode_color >actual &&
1437         cat <<-\EOF >expected &&
1438         <BOLD>diff --git a/lines.txt b/lines.txt<RESET>
1439         <BOLD>--- a/lines.txt<RESET>
1440         <BOLD>+++ b/lines.txt<RESET>
1441         <CYAN>@@ -1,9 +1,9 @@<RESET>
1442         <GREEN>+<RESET> <GREEN>long line 6<RESET>
1443         <GREEN>+<RESET> <GREEN>long line 7<RESET>
1444         <GREEN>+<RESET> <GREEN>long line 8<RESET>
1445         <GREEN>+<RESET> <GREEN>changed long line 9<RESET>
1446          line 1<RESET>
1447          line 2<RESET>
1448          line 3<RESET>
1449          line 4<RESET>
1450          line 5<RESET>
1451         <RED>-long line 6<RESET>
1452         <RED>-long line 7<RESET>
1453         <RED>-long line 8<RESET>
1454         <RED>-long line 9<RESET>
1455         EOF
1456         test_cmp expected actual &&
1457
1458         git diff HEAD --no-renames --color-moved --color \
1459                 --color-moved-ws=ignore-all-space >actual.raw &&
1460         grep -v "index" actual.raw | test_decode_color >actual &&
1461         cat <<-\EOF >expected &&
1462         <BOLD>diff --git a/lines.txt b/lines.txt<RESET>
1463         <BOLD>--- a/lines.txt<RESET>
1464         <BOLD>+++ b/lines.txt<RESET>
1465         <CYAN>@@ -1,9 +1,9 @@<RESET>
1466         <CYAN>+<RESET>  <CYAN>long line 6<RESET>
1467         <CYAN>+<RESET>  <CYAN>long line 7<RESET>
1468         <CYAN>+<RESET>  <CYAN>long line 8<RESET>
1469         <GREEN>+<RESET> <GREEN>changed long line 9<RESET>
1470          line 1<RESET>
1471          line 2<RESET>
1472          line 3<RESET>
1473          line 4<RESET>
1474          line 5<RESET>
1475         <MAGENTA>-long line 6<RESET>
1476         <MAGENTA>-long line 7<RESET>
1477         <MAGENTA>-long line 8<RESET>
1478         <RED>-long line 9<RESET>
1479         EOF
1480         test_cmp expected actual
1481 '
1482
1483 test_expect_success 'move detection ignoring whitespace changes' '
1484         git reset --hard &&
1485         # Lines 6-8 have a space change, but 9 is new whitespace
1486         q_to_tab <<-\EOF >lines.txt &&
1487         longQline 6
1488         longQline 7
1489         longQline 8
1490         long liQne 9
1491         line 1
1492         line 2
1493         line 3
1494         line 4
1495         line 5
1496         EOF
1497
1498         git diff HEAD --no-renames --color-moved --color >actual.raw &&
1499         grep -v "index" actual.raw | test_decode_color >actual &&
1500         cat <<-\EOF >expected &&
1501         <BOLD>diff --git a/lines.txt b/lines.txt<RESET>
1502         <BOLD>--- a/lines.txt<RESET>
1503         <BOLD>+++ b/lines.txt<RESET>
1504         <CYAN>@@ -1,9 +1,9 @@<RESET>
1505         <GREEN>+<RESET><GREEN>long      line 6<RESET>
1506         <GREEN>+<RESET><GREEN>long      line 7<RESET>
1507         <GREEN>+<RESET><GREEN>long      line 8<RESET>
1508         <GREEN>+<RESET><GREEN>long li   ne 9<RESET>
1509          line 1<RESET>
1510          line 2<RESET>
1511          line 3<RESET>
1512          line 4<RESET>
1513          line 5<RESET>
1514         <RED>-long line 6<RESET>
1515         <RED>-long line 7<RESET>
1516         <RED>-long line 8<RESET>
1517         <RED>-long line 9<RESET>
1518         EOF
1519         test_cmp expected actual &&
1520
1521         git diff HEAD --no-renames --color-moved --color \
1522                 --color-moved-ws=ignore-space-change >actual.raw &&
1523         grep -v "index" actual.raw | test_decode_color >actual &&
1524         cat <<-\EOF >expected &&
1525         <BOLD>diff --git a/lines.txt b/lines.txt<RESET>
1526         <BOLD>--- a/lines.txt<RESET>
1527         <BOLD>+++ b/lines.txt<RESET>
1528         <CYAN>@@ -1,9 +1,9 @@<RESET>
1529         <CYAN>+<RESET><CYAN>long        line 6<RESET>
1530         <CYAN>+<RESET><CYAN>long        line 7<RESET>
1531         <CYAN>+<RESET><CYAN>long        line 8<RESET>
1532         <GREEN>+<RESET><GREEN>long li   ne 9<RESET>
1533          line 1<RESET>
1534          line 2<RESET>
1535          line 3<RESET>
1536          line 4<RESET>
1537          line 5<RESET>
1538         <MAGENTA>-long line 6<RESET>
1539         <MAGENTA>-long line 7<RESET>
1540         <MAGENTA>-long line 8<RESET>
1541         <RED>-long line 9<RESET>
1542         EOF
1543         test_cmp expected actual
1544 '
1545
1546 test_expect_success 'move detection ignoring whitespace at eol' '
1547         git reset --hard &&
1548         # Lines 6-9 have new eol whitespace, but 9 also has it in the middle
1549         q_to_tab <<-\EOF >lines.txt &&
1550         long line 6Q
1551         long line 7Q
1552         long line 8Q
1553         longQline 9Q
1554         line 1
1555         line 2
1556         line 3
1557         line 4
1558         line 5
1559         EOF
1560
1561         # avoid cluttering the output with complaints about our eol whitespace
1562         test_config core.whitespace -blank-at-eol &&
1563
1564         git diff HEAD --no-renames --color-moved --color >actual.raw &&
1565         grep -v "index" actual.raw | test_decode_color >actual &&
1566         cat <<-\EOF >expected &&
1567         <BOLD>diff --git a/lines.txt b/lines.txt<RESET>
1568         <BOLD>--- a/lines.txt<RESET>
1569         <BOLD>+++ b/lines.txt<RESET>
1570         <CYAN>@@ -1,9 +1,9 @@<RESET>
1571         <GREEN>+<RESET><GREEN>long line 6       <RESET>
1572         <GREEN>+<RESET><GREEN>long line 7       <RESET>
1573         <GREEN>+<RESET><GREEN>long line 8       <RESET>
1574         <GREEN>+<RESET><GREEN>long      line 9  <RESET>
1575          line 1<RESET>
1576          line 2<RESET>
1577          line 3<RESET>
1578          line 4<RESET>
1579          line 5<RESET>
1580         <RED>-long line 6<RESET>
1581         <RED>-long line 7<RESET>
1582         <RED>-long line 8<RESET>
1583         <RED>-long line 9<RESET>
1584         EOF
1585         test_cmp expected actual &&
1586
1587         git diff HEAD --no-renames --color-moved --color \
1588                 --color-moved-ws=ignore-space-at-eol >actual.raw &&
1589         grep -v "index" actual.raw | test_decode_color >actual &&
1590         cat <<-\EOF >expected &&
1591         <BOLD>diff --git a/lines.txt b/lines.txt<RESET>
1592         <BOLD>--- a/lines.txt<RESET>
1593         <BOLD>+++ b/lines.txt<RESET>
1594         <CYAN>@@ -1,9 +1,9 @@<RESET>
1595         <CYAN>+<RESET><CYAN>long line 6 <RESET>
1596         <CYAN>+<RESET><CYAN>long line 7 <RESET>
1597         <CYAN>+<RESET><CYAN>long line 8 <RESET>
1598         <GREEN>+<RESET><GREEN>long      line 9  <RESET>
1599          line 1<RESET>
1600          line 2<RESET>
1601          line 3<RESET>
1602          line 4<RESET>
1603          line 5<RESET>
1604         <MAGENTA>-long line 6<RESET>
1605         <MAGENTA>-long line 7<RESET>
1606         <MAGENTA>-long line 8<RESET>
1607         <RED>-long line 9<RESET>
1608         EOF
1609         test_cmp expected actual
1610 '
1611
1612 test_expect_success 'clean up whitespace-test colors' '
1613         git config --unset color.diff.oldMoved &&
1614         git config --unset color.diff.newMoved
1615 '
1616
1617 test_expect_success '--color-moved block at end of diff output respects MIN_ALNUM_COUNT' '
1618         git reset --hard &&
1619         >bar &&
1620         cat <<-\EOF >foo &&
1621         irrelevant_line
1622         line1
1623         EOF
1624         git add foo bar &&
1625         git commit -m x &&
1626
1627         cat <<-\EOF >bar &&
1628         line1
1629         EOF
1630         cat <<-\EOF >foo &&
1631         irrelevant_line
1632         EOF
1633
1634         git diff HEAD --color-moved=zebra --color --no-renames >actual.raw &&
1635         grep -v "index" actual.raw | test_decode_color >actual &&
1636         cat >expected <<-\EOF &&
1637         <BOLD>diff --git a/bar b/bar<RESET>
1638         <BOLD>--- a/bar<RESET>
1639         <BOLD>+++ b/bar<RESET>
1640         <CYAN>@@ -0,0 +1 @@<RESET>
1641         <GREEN>+<RESET><GREEN>line1<RESET>
1642         <BOLD>diff --git a/foo b/foo<RESET>
1643         <BOLD>--- a/foo<RESET>
1644         <BOLD>+++ b/foo<RESET>
1645         <CYAN>@@ -1,2 +1 @@<RESET>
1646          irrelevant_line<RESET>
1647         <RED>-line1<RESET>
1648         EOF
1649
1650         test_cmp expected actual
1651 '
1652
1653 test_expect_success '--color-moved respects MIN_ALNUM_COUNT' '
1654         git reset --hard &&
1655         cat <<-\EOF >foo &&
1656         nineteen chars 456789
1657         irrelevant_line
1658         twenty chars 234567890
1659         EOF
1660         >bar &&
1661         git add foo bar &&
1662         git commit -m x &&
1663
1664         cat <<-\EOF >foo &&
1665         irrelevant_line
1666         EOF
1667         cat <<-\EOF >bar &&
1668         twenty chars 234567890
1669         nineteen chars 456789
1670         EOF
1671
1672         git diff HEAD --color-moved=zebra --color --no-renames >actual.raw &&
1673         grep -v "index" actual.raw | test_decode_color >actual &&
1674         cat >expected <<-\EOF &&
1675         <BOLD>diff --git a/bar b/bar<RESET>
1676         <BOLD>--- a/bar<RESET>
1677         <BOLD>+++ b/bar<RESET>
1678         <CYAN>@@ -0,0 +1,2 @@<RESET>
1679         <BOLD;CYAN>+<RESET><BOLD;CYAN>twenty chars 234567890<RESET>
1680         <GREEN>+<RESET><GREEN>nineteen chars 456789<RESET>
1681         <BOLD>diff --git a/foo b/foo<RESET>
1682         <BOLD>--- a/foo<RESET>
1683         <BOLD>+++ b/foo<RESET>
1684         <CYAN>@@ -1,3 +1 @@<RESET>
1685         <RED>-nineteen chars 456789<RESET>
1686          irrelevant_line<RESET>
1687         <BOLD;MAGENTA>-twenty chars 234567890<RESET>
1688         EOF
1689
1690         test_cmp expected actual
1691 '
1692
1693 test_expect_success '--color-moved treats adjacent blocks as separate for MIN_ALNUM_COUNT' '
1694         git reset --hard &&
1695         cat <<-\EOF >foo &&
1696         7charsA
1697         irrelevant_line
1698         7charsB
1699         7charsC
1700         EOF
1701         >bar &&
1702         git add foo bar &&
1703         git commit -m x &&
1704
1705         cat <<-\EOF >foo &&
1706         irrelevant_line
1707         EOF
1708         cat <<-\EOF >bar &&
1709         7charsB
1710         7charsC
1711         7charsA
1712         EOF
1713
1714         git diff HEAD --color-moved=zebra --color --no-renames >actual.raw &&
1715         grep -v "index" actual.raw | test_decode_color >actual &&
1716         cat >expected <<-\EOF &&
1717         <BOLD>diff --git a/bar b/bar<RESET>
1718         <BOLD>--- a/bar<RESET>
1719         <BOLD>+++ b/bar<RESET>
1720         <CYAN>@@ -0,0 +1,3 @@<RESET>
1721         <GREEN>+<RESET><GREEN>7charsB<RESET>
1722         <GREEN>+<RESET><GREEN>7charsC<RESET>
1723         <GREEN>+<RESET><GREEN>7charsA<RESET>
1724         <BOLD>diff --git a/foo b/foo<RESET>
1725         <BOLD>--- a/foo<RESET>
1726         <BOLD>+++ b/foo<RESET>
1727         <CYAN>@@ -1,4 +1 @@<RESET>
1728         <RED>-7charsA<RESET>
1729          irrelevant_line<RESET>
1730         <RED>-7charsB<RESET>
1731         <RED>-7charsC<RESET>
1732         EOF
1733
1734         test_cmp expected actual
1735 '
1736
1737 test_expect_success 'move detection with submodules' '
1738         test_create_repo bananas &&
1739         echo ripe >bananas/recipe &&
1740         git -C bananas add recipe &&
1741         test_commit fruit &&
1742         test_commit -C bananas recipe &&
1743         git submodule add ./bananas &&
1744         git add bananas &&
1745         git commit -a -m "bananas are like a heavy library?" &&
1746         echo foul >bananas/recipe &&
1747         echo ripe >fruit.t &&
1748
1749         git diff --submodule=diff --color-moved --color >actual &&
1750
1751         # no move detection as the moved line is across repository boundaries.
1752         test_decode_color <actual >decoded_actual &&
1753         ! grep BGREEN decoded_actual &&
1754         ! grep BRED decoded_actual &&
1755
1756         # nor did we mess with it another way
1757         git diff --submodule=diff --color | test_decode_color >expect &&
1758         test_cmp expect decoded_actual &&
1759         rm -rf bananas &&
1760         git submodule deinit bananas
1761 '
1762
1763 test_expect_success 'only move detection ignores white spaces' '
1764         git reset --hard &&
1765         q_to_tab <<-\EOF >text.txt &&
1766                 a long line to exceed per-line minimum
1767                 another long line to exceed per-line minimum
1768                 original file
1769         EOF
1770         git add text.txt &&
1771         git commit -m "add text" &&
1772         q_to_tab <<-\EOF >text.txt &&
1773                 Qa long line to exceed per-line minimum
1774                 Qanother long line to exceed per-line minimum
1775                 new file
1776         EOF
1777
1778         # Make sure we get a different diff using -w
1779         git diff --color --color-moved -w >actual.raw &&
1780         grep -v "index" actual.raw | test_decode_color >actual &&
1781         q_to_tab <<-\EOF >expected &&
1782         <BOLD>diff --git a/text.txt b/text.txt<RESET>
1783         <BOLD>--- a/text.txt<RESET>
1784         <BOLD>+++ b/text.txt<RESET>
1785         <CYAN>@@ -1,3 +1,3 @@<RESET>
1786          Qa long line to exceed per-line minimum<RESET>
1787          Qanother long line to exceed per-line minimum<RESET>
1788         <RED>-original file<RESET>
1789         <GREEN>+<RESET><GREEN>new file<RESET>
1790         EOF
1791         test_cmp expected actual &&
1792
1793         # And now ignoring white space only in the move detection
1794         git diff --color --color-moved \
1795                 --color-moved-ws=ignore-all-space,ignore-space-change,ignore-space-at-eol >actual.raw &&
1796         grep -v "index" actual.raw | test_decode_color >actual &&
1797         q_to_tab <<-\EOF >expected &&
1798         <BOLD>diff --git a/text.txt b/text.txt<RESET>
1799         <BOLD>--- a/text.txt<RESET>
1800         <BOLD>+++ b/text.txt<RESET>
1801         <CYAN>@@ -1,3 +1,3 @@<RESET>
1802         <BOLD;MAGENTA>-a long line to exceed per-line minimum<RESET>
1803         <BOLD;MAGENTA>-another long line to exceed per-line minimum<RESET>
1804         <RED>-original file<RESET>
1805         <BOLD;CYAN>+<RESET>Q<BOLD;CYAN>a long line to exceed per-line minimum<RESET>
1806         <BOLD;CYAN>+<RESET>Q<BOLD;CYAN>another long line to exceed per-line minimum<RESET>
1807         <GREEN>+<RESET><GREEN>new file<RESET>
1808         EOF
1809         test_cmp expected actual
1810 '
1811
1812 test_expect_success 'compare whitespace delta across moved blocks' '
1813
1814         git reset --hard &&
1815         q_to_tab <<-\EOF >text.txt &&
1816         QIndented
1817         QText across
1818         Qsome lines
1819         QBut! <- this stands out
1820         QAdjusting with
1821         QQdifferent starting
1822         Qwhite spaces
1823         QAnother outlier
1824         QQQIndented
1825         QQQText across
1826         QQQfive lines
1827         QQQthat has similar lines
1828         QQQto previous blocks, but with different indent
1829         QQQYetQAnotherQoutlierQ
1830         QLine with internal w h i t e s p a c e change
1831         EOF
1832
1833         git add text.txt &&
1834         git commit -m "add text.txt" &&
1835
1836         q_to_tab <<-\EOF >text.txt &&
1837         QQIndented
1838         QQText across
1839         QQsome lines
1840         QQQBut! <- this stands out
1841         Adjusting with
1842         Qdifferent starting
1843         white spaces
1844         AnotherQoutlier
1845         QQIndented
1846         QQText across
1847         QQfive lines
1848         QQthat has similar lines
1849         QQto previous blocks, but with different indent
1850         QQYetQAnotherQoutlier
1851         QLine with internal whitespace change
1852         EOF
1853
1854         git diff --color --color-moved --color-moved-ws=allow-indentation-change >actual.raw &&
1855         grep -v "index" actual.raw | test_decode_color >actual &&
1856
1857         q_to_tab <<-\EOF >expected &&
1858                 <BOLD>diff --git a/text.txt b/text.txt<RESET>
1859                 <BOLD>--- a/text.txt<RESET>
1860                 <BOLD>+++ b/text.txt<RESET>
1861                 <CYAN>@@ -1,15 +1,15 @@<RESET>
1862                 <BOLD;MAGENTA>-QIndented<RESET>
1863                 <BOLD;MAGENTA>-QText across<RESET>
1864                 <BOLD;MAGENTA>-Qsome lines<RESET>
1865                 <RED>-QBut! <- this stands out<RESET>
1866                 <BOLD;MAGENTA>-QAdjusting with<RESET>
1867                 <BOLD;MAGENTA>-QQdifferent starting<RESET>
1868                 <BOLD;MAGENTA>-Qwhite spaces<RESET>
1869                 <RED>-QAnother outlier<RESET>
1870                 <BOLD;MAGENTA>-QQQIndented<RESET>
1871                 <BOLD;MAGENTA>-QQQText across<RESET>
1872                 <BOLD;MAGENTA>-QQQfive lines<RESET>
1873                 <BOLD;MAGENTA>-QQQthat has similar lines<RESET>
1874                 <BOLD;MAGENTA>-QQQto previous blocks, but with different indent<RESET>
1875                 <RED>-QQQYetQAnotherQoutlierQ<RESET>
1876                 <RED>-QLine with internal w h i t e s p a c e change<RESET>
1877                 <BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>Indented<RESET>
1878                 <BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>Text across<RESET>
1879                 <BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>some lines<RESET>
1880                 <GREEN>+<RESET>QQQ<GREEN>But! <- this stands out<RESET>
1881                 <BOLD;CYAN>+<RESET><BOLD;CYAN>Adjusting with<RESET>
1882                 <BOLD;CYAN>+<RESET>Q<BOLD;CYAN>different starting<RESET>
1883                 <BOLD;CYAN>+<RESET><BOLD;CYAN>white spaces<RESET>
1884                 <GREEN>+<RESET><GREEN>AnotherQoutlier<RESET>
1885                 <BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>Indented<RESET>
1886                 <BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>Text across<RESET>
1887                 <BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>five lines<RESET>
1888                 <BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>that has similar lines<RESET>
1889                 <BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>to previous blocks, but with different indent<RESET>
1890                 <GREEN>+<RESET>QQ<GREEN>YetQAnotherQoutlier<RESET>
1891                 <GREEN>+<RESET>Q<GREEN>Line with internal whitespace change<RESET>
1892         EOF
1893
1894         test_cmp expected actual
1895 '
1896
1897 test_expect_success 'bogus settings in move detection erroring out' '
1898         test_must_fail git diff --color-moved=bogus 2>err &&
1899         test_i18ngrep "must be one of" err &&
1900         test_i18ngrep bogus err &&
1901
1902         test_must_fail git -c diff.colormoved=bogus diff 2>err &&
1903         test_i18ngrep "must be one of" err &&
1904         test_i18ngrep "from command-line config" err &&
1905
1906         test_must_fail git diff --color-moved-ws=bogus 2>err &&
1907         test_i18ngrep "possible values" err &&
1908         test_i18ngrep bogus err &&
1909
1910         test_must_fail git -c diff.colormovedws=bogus diff 2>err &&
1911         test_i18ngrep "possible values" err &&
1912         test_i18ngrep "from command-line config" err
1913 '
1914
1915 test_expect_success 'compare whitespace delta incompatible with other space options' '
1916         test_must_fail git diff \
1917                 --color-moved-ws=allow-indentation-change,ignore-all-space \
1918                 2>err &&
1919         test_i18ngrep allow-indentation-change err
1920 '
1921
1922 EMPTY=''
1923 test_expect_success 'compare mixed whitespace delta across moved blocks' '
1924
1925         git reset --hard &&
1926         tr Q_ "\t " <<-EOF >text.txt &&
1927         ${EMPTY}
1928         ____too short without
1929         ${EMPTY}
1930         ___being grouped across blank line
1931         ${EMPTY}
1932         context
1933         lines
1934         to
1935         anchor
1936         ____Indented text to
1937         _Q____be further indented by four spaces across
1938         ____Qseveral lines
1939         QQ____These two lines have had their
1940         ____indentation reduced by four spaces
1941         Qdifferent indentation change
1942         ____too short
1943         EOF
1944
1945         git add text.txt &&
1946         git commit -m "add text.txt" &&
1947
1948         tr Q_ "\t " <<-EOF >text.txt &&
1949         context
1950         lines
1951         to
1952         anchor
1953         QIndented text to
1954         QQbe further indented by four spaces across
1955         Q____several lines
1956         ${EMPTY}
1957         QQtoo short without
1958         ${EMPTY}
1959         Q_______being grouped across blank line
1960         ${EMPTY}
1961         Q_QThese two lines have had their
1962         indentation reduced by four spaces
1963         QQdifferent indentation change
1964         __Qtoo short
1965         EOF
1966
1967         git -c color.diff.whitespace="normal red" \
1968                 -c core.whitespace=space-before-tab \
1969                 diff --color --color-moved --ws-error-highlight=all \
1970                 --color-moved-ws=allow-indentation-change >actual.raw &&
1971         grep -v "index" actual.raw | test_decode_color >actual &&
1972
1973         cat <<-\EOF >expected &&
1974         <BOLD>diff --git a/text.txt b/text.txt<RESET>
1975         <BOLD>--- a/text.txt<RESET>
1976         <BOLD>+++ b/text.txt<RESET>
1977         <CYAN>@@ -1,16 +1,16 @@<RESET>
1978         <BOLD;MAGENTA>-<RESET>
1979         <BOLD;MAGENTA>-<RESET><BOLD;MAGENTA>    too short without<RESET>
1980         <BOLD;MAGENTA>-<RESET>
1981         <BOLD;MAGENTA>-<RESET><BOLD;MAGENTA>   being grouped across blank line<RESET>
1982         <BOLD;MAGENTA>-<RESET>
1983          <RESET>context<RESET>
1984          <RESET>lines<RESET>
1985          <RESET>to<RESET>
1986          <RESET>anchor<RESET>
1987         <BOLD;MAGENTA>-<RESET><BOLD;MAGENTA>    Indented text to<RESET>
1988         <BOLD;MAGENTA>-<RESET><BRED> <RESET>    <BOLD;MAGENTA>    be further indented by four spaces across<RESET>
1989         <BOLD;MAGENTA>-<RESET><BRED>    <RESET> <BOLD;MAGENTA>several lines<RESET>
1990         <BOLD;BLUE>-<RESET>             <BOLD;BLUE>    These two lines have had their<RESET>
1991         <BOLD;BLUE>-<RESET><BOLD;BLUE>    indentation reduced by four spaces<RESET>
1992         <BOLD;MAGENTA>-<RESET>  <BOLD;MAGENTA>different indentation change<RESET>
1993         <RED>-<RESET><RED>    too short<RESET>
1994         <BOLD;CYAN>+<RESET>     <BOLD;CYAN>Indented text to<RESET>
1995         <BOLD;CYAN>+<RESET>             <BOLD;CYAN>be further indented by four spaces across<RESET>
1996         <BOLD;CYAN>+<RESET>     <BOLD;CYAN>    several lines<RESET>
1997         <BOLD;YELLOW>+<RESET>
1998         <BOLD;YELLOW>+<RESET>           <BOLD;YELLOW>too short without<RESET>
1999         <BOLD;YELLOW>+<RESET>
2000         <BOLD;YELLOW>+<RESET>   <BOLD;YELLOW>       being grouped across blank line<RESET>
2001         <BOLD;YELLOW>+<RESET>
2002         <BOLD;CYAN>+<RESET>     <BRED> <RESET>  <BOLD;CYAN>These two lines have had their<RESET>
2003         <BOLD;CYAN>+<RESET><BOLD;CYAN>indentation reduced by four spaces<RESET>
2004         <BOLD;YELLOW>+<RESET>           <BOLD;YELLOW>different indentation change<RESET>
2005         <GREEN>+<RESET><BRED>  <RESET>  <GREEN>too short<RESET>
2006         EOF
2007
2008         test_cmp expected actual
2009 '
2010
2011 # Note that the "6" in the expected hunk header below is funny, since we only
2012 # show 5 lines (the missing one was blank and thus ignored). This is how
2013 # --ignore-blank-lines behaves even without --function-context, and this test
2014 # is just checking the interaction of the two features. Don't take it as an
2015 # endorsement of that output.
2016 test_expect_success 'combine --ignore-blank-lines with --function-context' '
2017         test_write_lines 1 "" 2 3 4 5 >a &&
2018         test_write_lines 1    2 3 4   >b &&
2019         test_must_fail git diff --no-index \
2020                 --ignore-blank-lines --function-context a b >actual.raw &&
2021         sed -n "/@@/,\$p" <actual.raw >actual &&
2022         cat <<-\EOF >expect &&
2023         @@ -1,6 +1,4 @@
2024          1
2025          2
2026          3
2027          4
2028         -5
2029         EOF
2030         test_cmp expect actual
2031 '
2032
2033 test_done