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1 #!/bin/sh
2
3 test_description='
4 The general idea is that we have a single file whose lines come from
5 multiple other files, and those individual files were modified in the same
6 commits. That means that we will see the same commit in multiple contexts,
7 and each one should be attributed to the correct file.
8
9 Note that we need to use "blame -C" to find the commit for all lines. We will
10 not bother testing that the non-C case fails to find it. That is how blame
11 behaves now, but it is not a property we want to make sure is retained.
12 '
13 . ./test-lib.sh
14
15 # help avoid typing and reading long strings of similar lines
16 # in the tests below
17 generate_expect () {
18 while read nr data
19 do
20 i=0
21 while test $i -lt $nr
22 do
23 echo $data
24 i=$((i + 1))
25 done
26 done
27 }
28
29 test_expect_success 'setup split file case' '
30 # use lines long enough to trigger content detection
31 test_seq 1000 1010 >one &&
32 test_seq 2000 2010 >two &&
33 git add one two &&
34 test_commit base &&
35
36 sed "6s/^/modified /" <one >one.tmp &&
37 mv one.tmp one &&
38 sed "6s/^/modified /" <two >two.tmp &&
39 mv two.tmp two &&
40 git add -u &&
41 test_commit modified &&
42
43 cat one two >combined &&
44 git add combined &&
45 git rm one two &&
46 test_commit combined
47 '
48
49 test_expect_success 'setup simulated porcelain' '
50 # This just reads porcelain-ish output and tries
51 # to output the value of a given field for each line (either by
52 # reading the field that accompanies this line, or referencing
53 # the information found last time the commit was mentioned).
54 cat >read-porcelain.pl <<-\EOF
55 my $field = shift;
56 while (<>) {
57 if (/^[0-9a-f]{40} /) {
58 flush();
59 $hash = $&;
60 } elsif (/^$field (.*)/) {
61 $cache{$hash} = $1;
62 }
63 }
64 flush();
65
66 sub flush {
67 return unless defined $hash;
68 if (defined $cache{$hash}) {
69 print "$cache{$hash}\n";
70 } else {
71 print "NONE\n";
72 }
73 }
74 EOF
75 '
76
77 for output in porcelain line-porcelain
78 do
79 test_expect_success "generate --$output output" '
80 git blame --root -C --$output combined >output
81 '
82
83 test_expect_success "$output output finds correct commits" '
84 generate_expect >expect <<-\EOF &&
85 5 base
86 1 modified
87 10 base
88 1 modified
89 5 base
90 EOF
91 perl read-porcelain.pl summary <output >actual &&
92 test_cmp expect actual
93 '
94
95 test_expect_success "$output output shows correct filenames" '
96 generate_expect >expect <<-\EOF &&
97 11 one
98 11 two
99 EOF
100 perl read-porcelain.pl filename <output >actual &&
101 test_cmp expect actual
102 '
103
104 test_expect_success "$output output shows correct previous pointer" '
105 generate_expect >expect <<-EOF &&
106 5 NONE
107 1 $(git rev-parse modified^) one
108 10 NONE
109 1 $(git rev-parse modified^) two
110 5 NONE
111 EOF
112 perl read-porcelain.pl previous <output >actual &&
113 test_cmp expect actual
114 '
115 done
116
117 test_done