t1300: document some aesthetic failures of the config editor

diff --git a/t/t1300-repo-config.sh b/t/t1300-repo-config.sh
index 3c96fda548709835e10f283df8cab667c280af81..c4a7d84f46fd218af1824ac1f78a1e9f4cb15cec 100755 (executable)
--- a/t/t1300-repo-config.sh
+++ b/t/t1300-repo-config.sh
@@ -1087,4 +1087,39 @@ test_expect_success 'barf on incomplete string' '
        grep " line 3 " error
 '
 
+# good section hygiene
+test_expect_failure 'unsetting the last key in a section removes header' '
+       cat >.git/config <<-\EOF &&
+       # some generic comment on the configuration file itself
+       # a comment specific to this "section" section.
+       [section]
+       # some intervening lines
+       # that should also be dropped
+
+       key = value
+       # please be careful when you update the above variable
+       EOF
+
+       cat >expect <<-\EOF &&
+       # some generic comment on the configuration file itself
+       EOF
+
+       git config --unset section.key &&
+       test_cmp expect .git/config
+'
+
+test_expect_failure 'adding a key into an empty section reuses header' '
+       cat >.git/config <<-\EOF &&
+       [section]
+       EOF
+
+       q_to_tab >expect <<-\EOF &&
+       [section]
+       Qkey = value
+       EOF
+
+       git config section.key value
+       test_cmp expect .git/config
+'
+
 test_done