added a simple test suite

diff --git a/test.sh b/test.sh
new file mode 100755 (executable)
index 0000000..ca8a4dc
--- /dev/null
+++ b/test.sh
@@ -0,0 +1,191 @@
+#!/bin/sh
+
+COMPILER=cc
+CCACHE=../ccache
+TESTDIR=test.$$
+
+
+test_failed() {
+    reason="$1"
+    echo $1
+    $CCACHE -s
+    cd ..
+    rm -rf $TESTDIR
+    echo TEST FAILED
+    exit 1
+}
+
+randcode() {
+    outfile="$1"
+    nlines=`expr $RANDOM % 100`
+    i=0;
+    (
+    while [ $i -lt $nlines ]; do
+       echo "int foo$i(int x) { return x; }"
+       i=`expr $i + 1`
+    done
+    ) > "$outfile"
+}
+
+
+getstat() {
+    stat="$1"
+    value=`$CCACHE -s | grep "$stat" | cut -c34-40`
+    echo $value
+}
+
+checkstat() {
+    stat="$1"
+    expected_value="$2"
+    value=`getstat "$stat"`
+    if [ "$expected_value" != "$value" ]; then
+       test_failed "Expected $stat to be $expected_value - got $value"
+    fi
+}
+
+
+basetests() {
+    $CCACHE -z > /dev/null
+    checkstat 'cache hit' 0
+    checkstat 'cache miss' 0
+
+    randcode test1.c
+    randcode test2.c
+    
+    $CCACHE_COMPILE -c test1.c
+    checkstat 'cache hit' 0
+    checkstat 'cache miss' 1
+    
+    $CCACHE_COMPILE -c test1.c
+    checkstat 'cache hit' 1
+    checkstat 'cache miss' 1
+    
+    $CCACHE_COMPILE -c test1.c -g
+    checkstat 'cache hit' 1
+    checkstat 'cache miss' 2
+    
+    $CCACHE_COMPILE -c test1.c -g
+    checkstat 'cache hit' 2
+    checkstat 'cache miss' 2
+    
+    $CCACHE_COMPILE -c test1.c -o foo.o
+    checkstat 'cache hit' 3
+    checkstat 'cache miss' 2
+
+    $CCACHE_COMPILE test1.c -o test 2> /dev/null
+    checkstat 'called for link' 1
+
+    $CCACHE_COMPILE -c test1.c test2.c
+    checkstat 'multiple source files' 1
+
+    $CCACHE blahblah -c test1.c 2> /dev/null
+    checkstat "couldn't find the compiler" 1 
+
+    $CCACHE_COMPILE -c test1.c -I 2> /dev/null
+    checkstat 'bad compiler arguments' 1
+
+    ln -f test1.c test1.ccc
+    $CCACHE_COMPILE -c test1.ccc 2> /dev/null
+    checkstat 'not a C/C++ file' 1
+
+    $CCACHE_COMPILE -M foo -c test1.c > /dev/null 2>&1
+    checkstat 'unsupported compiler option' 1
+
+    $CCACHE echo foo -c test1.c > /dev/null
+    checkstat 'compiler produced stdout' 1
+
+    $CCACHE_COMPILE -o /dev/zero -c test1.c
+    checkstat 'output to a non-regular file' 1
+
+    $CCACHE_COMPILE -c -O2 2> /dev/null
+    checkstat 'no input file' 1
+
+
+    CCACHE_DISABLE=1 $CCACHE_COMPILE -c test1.c 2> /dev/null
+    checkstat 'cache hit' 3
+
+    $CCACHE_COMPILE -c test1.c 2> /dev/null
+    checkstat 'cache hit' 4
+
+    CCACHE_CPP2=1 $CCACHE_COMPILE -c test1.c -O -Wall
+    checkstat 'cache hit' 4
+    checkstat 'cache miss' 3
+
+    CCACHE_CPP2=1 $CCACHE_COMPILE -c test1.c -O -Wall
+    checkstat 'cache hit' 5
+    checkstat 'cache miss' 3
+
+    CCACHE_NOSTATS=1 $CCACHE_COMPILE -c test1.c -O -Wall
+    checkstat 'cache hit' 5
+    checkstat 'cache miss' 3
+
+    CCACHE_RECACHE=1 $CCACHE_COMPILE -c test1.c -O -Wall
+    checkstat 'cache hit' 5
+    checkstat 'cache miss' 4
+
+    # strictly speaking should be 6 - RECACHE causes a double counting!
+    checkstat 'files in cache' 8
+    $CCACHE -c > /dev/null
+    checkstat 'files in cache' 6
+
+    CCACHE_HASHDIR=1 $CCACHE_COMPILE -c test1.c -O -Wall
+    checkstat 'cache hit' 5
+    checkstat 'cache miss' 5
+
+    CCACHE_HASHDIR=1 $CCACHE_COMPILE -c test1.c -O -Wall
+    checkstat 'cache hit' 6
+    checkstat 'cache miss' 5
+
+    checkstat 'files in cache' 8
+    
+    echo '/* a silly comment */' >> test1.c
+    $CCACHE_COMPILE -c test1.c
+    checkstat 'cache hit' 6
+    checkstat 'cache miss' 6
+
+    echo 'possible unify bug?'
+#    echo '/* another comment */' >> test1.c
+#    CCACHE_UNIFY=1 $CCACHE_COMPILE -c test1.c 2> /dev/null
+#    checkstat 'cache hit' 7
+#    checkstat 'cache miss' 6
+
+
+    echo 'possible -F bug?'
+#    $CCACHE -F 2 -c
+#    $CCACHE -c
+#    checkstat 'files in cache' 2
+
+    checkstat 'files in cache' 10
+
+    $CCACHE -z > /dev/null
+    checkstat 'cache hit' 0
+    checkstat 'cache miss' 0
+
+    $CCACHE -C > /dev/null
+    checkstat 'files in cache' 0
+
+
+    rm -f test1.c
+}
+
+######
+# main program
+rm -rf $TESTDIR
+mkdir $TESTDIR
+cd $TESTDIR
+mkdir .ccache
+export CCACHE_DIR=.ccache
+
+CCACHE_COMPILE="$CCACHE $COMPILER"
+basetests
+
+ln -s ../ccache $COMPILER
+CCACHE_COMPILE="./$COMPILER"
+basetests
+
+
+
+cd ..
+rm -rf $TESTDIR
+echo test done - OK
+exit 0