#!/bin/sh

test_description='diff function context'

. ./test-lib.sh
. "$TEST_DIRECTORY"/diff-lib.sh


cat <<\EOF >hello.c
#include <stdio.h>

static int a(void)
{
        /*
         * Dummy.
         */
}

static int hello_world(void)
{
        /* Classic. */
        printf("Hello world.\n");

        /* Success! */
        return 0;
}
static int b(void)
{
        /*
         * Dummy, too.
         */
}

int main(int argc, char **argv)
{
        a();
        b();
        return hello_world();
}
EOF

test_expect_success 'setup' '
        git add hello.c &&
        test_tick &&
        git commit -m initial &&

        grep -v Classic <hello.c >hello.c.new &&
        mv hello.c.new hello.c
'

cat <<\EOF >expected
diff --git a/hello.c b/hello.c
--- a/hello.c
+++ b/hello.c
@@ -10,8 +10,7 @@ static int a(void)
 static int hello_world(void)
 {
-       /* Classic. */
        printf("Hello world.\n");
 
        /* Success! */
        return 0;
 }
EOF

test_expect_success 'diff -U0 -W' '
        git diff -U0 -W >actual &&
        compare_diff_patch actual expected
'

cat <<\EOF >expected
diff --git a/hello.c b/hello.c
--- a/hello.c
+++ b/hello.c
@@ -9,9 +9,8 @@ static int a(void)
 
 static int hello_world(void)
 {
-       /* Classic. */
        printf("Hello world.\n");
 
        /* Success! */
        return 0;
 }
EOF

test_expect_success 'diff -W' '
        git diff -W >actual &&
        compare_diff_patch actual expected
'

test_done