t1507: inline full_name()

Before, we were running `test_must_fail full_name`. However,
`test_must_fail` should only be used on git commands. Inline full_name()
so that we can use test_must_fail on the git command directly.

When full_name() was introduced in 28fb84382b (Introduce
<branch>@{upstream} notation, 2009-09-10), the `git -C` option wasn't
available yet (since it was introduced in 44e1e4d67d (git: run in a
directory given with -C option, 2013-09-09)). As a result, the helper
function removed the need to manually cd each time. However, since
`git -C` is available now, we can just use that instead and inline
full_name().

An alternate approach was taken where we taught full_name() to accept an
optional `!` arg to trigger test_must_fail behavior. However, this added
more unnecessary complexity than inlining so we inline instead.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t1507-rev-parse-upstream.sh

@@ -28,11 +28,6 @@ test_expect_success 'setup' '
 	)
 '
 
-full_name () {
-	(cd clone &&
-	 git rev-parse --symbolic-full-name "$@")
-}
-
 commit_subject () {
 	(cd clone &&
 	 git show -s --pretty=tformat:%s "$@")
@@ -45,50 +40,50 @@ error_message () {
 
 test_expect_success '@{upstream} resolves to correct full name' '
 	echo refs/remotes/origin/master >expect &&
-	full_name @{upstream} >actual &&
+	git -C clone rev-parse --symbolic-full-name @{upstream} >actual &&
 	test_cmp expect actual &&
-	full_name @{UPSTREAM} >actual &&
+	git -C clone rev-parse --symbolic-full-name @{UPSTREAM} >actual &&
 	test_cmp expect actual &&
-	full_name @{UpSTReam} >actual &&
+	git -C clone rev-parse --symbolic-full-name @{UpSTReam} >actual &&
 	test_cmp expect actual
 '
 
 test_expect_success '@{u} resolves to correct full name' '
 	echo refs/remotes/origin/master >expect &&
-	full_name @{u} >actual &&
+	git -C clone rev-parse --symbolic-full-name @{u} >actual &&
 	test_cmp expect actual &&
-	full_name @{U} >actual &&
+	git -C clone rev-parse --symbolic-full-name @{U} >actual &&
 	test_cmp expect actual
 '
 
 test_expect_success 'my-side@{upstream} resolves to correct full name' '
 	echo refs/remotes/origin/side >expect &&
-	full_name my-side@{u} >actual &&
+	git -C clone rev-parse --symbolic-full-name my-side@{u} >actual &&
 	test_cmp expect actual
 '
 
 test_expect_success 'upstream of branch with @ in middle' '
-	full_name fun@ny@{u} >actual &&
+	git -C clone rev-parse --symbolic-full-name fun@ny@{u} >actual &&
 	echo refs/remotes/origin/side >expect &&
 	test_cmp expect actual &&
-	full_name fun@ny@{U} >actual &&
+	git -C clone rev-parse --symbolic-full-name fun@ny@{U} >actual &&
 	test_cmp expect actual
 '
 
 test_expect_success 'upstream of branch with @ at start' '
-	full_name @funny@{u} >actual &&
+	git -C clone rev-parse --symbolic-full-name @funny@{u} >actual &&
 	echo refs/remotes/origin/side >expect &&
 	test_cmp expect actual
 '
 
 test_expect_success 'upstream of branch with @ at end' '
-	full_name funny@@{u} >actual &&
+	git -C clone rev-parse --symbolic-full-name funny@@{u} >actual &&
 	echo refs/remotes/origin/side >expect &&
 	test_cmp expect actual
 '
 
 test_expect_success 'refs/heads/my-side@{upstream} does not resolve to my-side{upstream}' '
-	test_must_fail full_name refs/heads/my-side@{upstream}
+	test_must_fail git -C clone rev-parse --symbolic-full-name refs/heads/my-side@{upstream}
 '
 
 test_expect_success 'my-side@{u} resolves to correct commit' '
@@ -103,9 +98,9 @@ test_expect_success 'my-side@{u} resolves to correct commit' '
 '
 
 test_expect_success 'not-tracking@{u} fails' '
-	test_must_fail full_name non-tracking@{u} &&
+	test_must_fail git -C clone rev-parse --symbolic-full-name non-tracking@{u} &&
 	(cd clone && git checkout --no-track -b non-tracking) &&
-	test_must_fail full_name non-tracking@{u}
+	test_must_fail git -C clone rev-parse --symbolic-full-name non-tracking@{u}
 '
 
 test_expect_success '<branch>@{u}@{1} resolves correctly' '
@@ -165,7 +160,7 @@ test_expect_success 'checkout other@{u}' '
 
 test_expect_success 'branch@{u} works when tracking a local branch' '
 	echo refs/heads/master >expect &&
-	full_name local-master@{u} >actual &&
+	git -C clone rev-parse --symbolic-full-name local-master@{u} >actual &&
 	test_cmp expect actual
 '
 
@@ -221,7 +216,7 @@ test_expect_success 'pull works when tracking a local branch' '
 # makes sense if the previous one succeeded
 test_expect_success '@{u} works when tracking a local branch' '
 	echo refs/heads/master >expect &&
-	full_name @{u} >actual &&
+	git -C clone rev-parse --symbolic-full-name @{u} >actual &&
 	test_cmp expect actual
 '