[PATCH v2 2/3] branch: add test for -m renaming multiple config sections

[Sahil Dua <sahildua2305@gmail.com>]

From: Ævar Arnfjörð Bjarmason <avarab@gmail.com>

Add a test for how 'git branch -m' handles the renaming of multiple
config sections existing for one branch.

The config format we use is hybrid machine/human editable, and we do
our best to preserve the likes of comments and formatting when editing
the file with git-config.

This adds a test for the currently expected semantics in the face of
some rather obscure edge cases which are unlikely to occur in
practice.

Helped-by: Sahil Dua <sahildua2305@gmail.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Sahil Dua <sahildua2305@gmail.com>
---

Changes
  * Use 'sed -n -e' instead of 'grep -A'.
  * Add mixed indentation for different config sections to
    test that formatting of renamed sections is preserved.

Note (from Avar): I ended up not taking Junio's commentary to use
<<-\EOF with spaces. I think it's important that this codepath be
tested for the exact formatting of the config being preserved, so the
test now does that with more exhaustive checks for the formatting at
the trivial expense of making the test not look like the usual
test idiom.

 t/t3200-branch.sh | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index 10f8f02..5eb752c 100755
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -341,6 +341,47 @@ test_expect_success 'config information was renamed, too' '
 	test_must_fail git config branch.s/s.dummy
 '
 
+test_expect_success 'git branch -m correctly renames multiple config sections' '
+	test_when_finished "git checkout master" &&
+	git checkout -b source master &&
+
+	# Assert that a config file with multiple config sections has
+	# those sections preserved...
+	cat >expect <<-\EOF &&
+	branch.dest.key1=value1
+	some.gar.b=age
+	branch.dest.key2=value2
+	EOF
+	cat >config.branch <<\EOF &&
+;; Note the lack of -\EOF above & mixed indenting here. This is
+;; intentional, we are also testing that the formatting of copied
+;; sections is preserved.
+
+;; Comment for source. Tabs
+[branch "source"]
+	;; Comment for the source value
+	key1 = value1
+;; Comment for some.gar. Spaces
+[some "gar"]
+    ;; Comment for the some.gar value
+    b = age
+;; Comment for source, again. Mixed tabs/spaces.
+[branch "source"]
+    ;; Comment for the source value, again
+	key2 = value2
+EOF
+	cat config.branch >>.git/config &&
+	git branch -m source dest &&
+	git config -f .git/config -l | grep -F -e source -e dest -e some.gar >actual &&
+	test_cmp expect actual &&
+
+	# ...and that the comments for those sections are also
+	# preserved.
+	cat config.branch | sed "s/\"source\"/\"dest\"/" >expect &&
+	sed -n -e "/Note the lack/,\$p" .git/config >actual &&
+	test_cmp expect actual
+'
+
 test_expect_success 'deleting a symref' '
 	git branch target &&
 	git symbolic-ref refs/heads/symref refs/heads/target &&
-- 
2.7.4 (Apple Git-66)