[PATCH v4 3/8] t5520: test for failure if index has unresolved entries

[Paul Tan <pyokagan@gmail.com>]

Commit d38a30d (Be more user-friendly when refusing to do something
because of conflict., 2010-01-12) introduced code paths to git-pull
which will error out with user-friendly advices if the user is in the
middle of a merge or has unmerged files.

Implement tests to ensure that git-pull will not run, and will print
these advices, if the user is in the middle of a merge or has unmerged
files in the index.

Signed-off-by: Paul Tan <pyokagan@gmail.com>
---

* Use the stricter "Pull is not possible because you have unmerged files"
  instead of you have unmerged files" as git-merge will also raise a similar
  error "merge is not possible because you have unmerged files"

* Also, grep for "You have not concluded your merge" instead of "have not
  concluded your merge" as the latter reads weird to me personally.

 t/t5520-pull.sh | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/t/t5520-pull.sh b/t/t5520-pull.sh
index 4a2c0a1..3bc0594 100755
--- a/t/t5520-pull.sh
+++ b/t/t5520-pull.sh
@@ -164,6 +164,26 @@ test_expect_success 'fail if upstream branch does not exist' '
 	test "$(cat file)" = file
 '
 
+test_expect_success 'fail if the index has unresolved entries' '
+	git checkout -b third second^ &&
+	test_when_finished "git checkout -f copy && git branch -D third" &&
+	test "$(cat file)" = file &&
+	echo modified2 >file &&
+	git commit -a -m modified2 &&
+	test -z "$(git ls-files -u)" &&
+	test_must_fail git pull . second &&
+	test -n "$(git ls-files -u)" &&
+	cp file expected &&
+	test_must_fail git pull . second 2>err &&
+	test_i18ngrep "Pull is not possible because you have unmerged files" err &&
+	test_cmp expected file &&
+	git add file &&
+	test -z "$(git ls-files -u)" &&
+	test_must_fail git pull . second 2>err &&
+	test_i18ngrep "You have not concluded your merge" err &&
+	test_cmp expected file
+'
+
 test_expect_success '--rebase' '
 	git branch to-rebase &&
 	echo modified again > file &&
-- 
2.1.4