t5510: add tests for fetch --prune

The failures will be fixed in later commits.

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t5510-fetch.sh

@@ -76,6 +76,56 @@ test_expect_success "fetch test for-merge" '
 	cut -f -2 .git/FETCH_HEAD >actual &&
 	test_cmp expected actual'
 
+test_expect_success 'fetch --prune on its own works as expected' '
+	cd "$D" &&
+	git clone . prune &&
+	cd prune &&
+	git fetch origin refs/heads/master:refs/remotes/origin/extrabranch &&
+
+	git fetch --prune origin &&
+	test_must_fail git rev-parse origin/extrabranch
+'
+
+test_expect_failure 'fetch --prune with a branch name keeps branches' '
+	cd "$D" &&
+	git clone . prune-branch &&
+	cd prune-branch &&
+	git fetch origin refs/heads/master:refs/remotes/origin/extrabranch &&
+
+	git fetch --prune origin master &&
+	git rev-parse origin/extrabranch
+'
+
+test_expect_failure 'fetch --prune with a namespace keeps other namespaces' '
+	cd "$D" &&
+	git clone . prune-namespace &&
+	cd prune-namespace &&
+
+	git fetch --prune origin refs/heads/a/*:refs/remotes/origin/a/* &&
+	git rev-parse origin/master
+'
+
+test_expect_failure 'fetch --prune --tags does not delete the remote-tracking branches' '
+	cd "$D" &&
+	git clone . prune-tags &&
+	cd prune-tags &&
+	git fetch origin refs/heads/master:refs/tags/sometag &&
+
+	git fetch --prune --tags origin &&
+	git rev-parse origin/master &&
+	test_must_fail git rev-parse somebranch
+'
+
+test_expect_failure 'fetch --prune --tags with branch does not delete other remote-tracking branches' '
+	cd "$D" &&
+	git clone . prune-tags-branch &&
+	cd prune-tags-branch &&
+	git fetch origin refs/heads/master:refs/remotes/origin/extrabranch &&
+
+	git fetch --prune --tags origin master &&
+	git rev-parse origin/extrabranch
+'
+
 test_expect_success 'fetch tags when there is no tags' '
 
     cd "$D" &&