test_cmp expected actual
'
+test_expect_success 'dashdash disambiguates rev as rev' '
+ test_when_finished "rm -f master" &&
+ echo content >master &&
+ echo master:hello.c >expect &&
+ git grep -l o master -- hello.c >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'dashdash disambiguates pathspec as pathspec' '
+ test_when_finished "git rm -f master" &&
+ echo content >master &&
+ git add master &&
+ echo master:content >expect &&
+ git grep o -- master >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'report bogus arg without dashdash' '
+ test_must_fail git grep o does-not-exist
+'
+
+test_expect_success 'report bogus rev with dashdash' '
+ test_must_fail git grep o hello.c --
+'
+
+test_expect_success 'allow non-existent path with dashdash' '
+ # We need a real match so grep exits with success.
+ tree=$(git ls-tree HEAD |
+ sed s/hello.c/not-in-working-tree/ |
+ git mktree) &&
+ git grep o "$tree" -- not-in-working-tree
+'
+
+test_expect_success 'grep --no-index pattern -- path' '
+ rm -fr non &&
+ mkdir -p non/git &&
+ (
+ GIT_CEILING_DIRECTORIES="$(pwd)/non" &&
+ export GIT_CEILING_DIRECTORIES &&
+ cd non/git &&
+ echo hello >hello &&
+ echo goodbye >goodbye &&
+ echo hello:hello >expect &&
+ git grep --no-index o -- hello >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'grep --no-index complains of revs' '
+ test_must_fail git grep --no-index o master -- 2>err &&
+ test_i18ngrep "cannot be used with revs" err
+'
+
+test_expect_success 'grep --no-index prefers paths to revs' '
+ test_when_finished "rm -f master" &&
+ echo content >master &&
+ echo master:content >expect &&
+ git grep --no-index o master >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'grep --no-index does not "diagnose" revs' '
+ test_must_fail git grep --no-index o :1:hello.c 2>err &&
+ test_i18ngrep ! -i "did you mean" err
+'
+
cat >expected <<EOF
hello.c:int main(int argc, const char **argv)
hello.c: printf("Hello world.\n");