.git/COMMIT_EDITMSG
'
+test_expect_success 'message shows date when it is explicitly set' '
+ git commit --allow-empty -e -m foo --date="2010-01-02T03:04:05" &&
+ test_i18ngrep \
+ "^# Date: *Sat Jan 2 03:04:05 2010 +0000" \
+ .git/COMMIT_EDITMSG
+'
+
test_expect_success AUTOIDENT 'message shows committer when it is automatic' '
echo >>negative &&
test_i18ngrep "^; Changes to be committed:" .git/COMMIT_EDITMSG
'
+test_expect_success 'switch core.commentchar' '
+ test_commit "#foo" foo &&
+ GIT_EDITOR=.git/FAKE_EDITOR git -c core.commentChar=auto commit --amend &&
+ test_i18ngrep "^; Changes to be committed:" .git/COMMIT_EDITMSG
+'
+
+test_expect_success 'switch core.commentchar but out of options' '
+ cat >text <<\EOF &&
+# 1
+; 2
+@ 3
+! 4
+$ 5
+% 6
+^ 7
+& 8
+| 9
+: 10
+EOF
+ git commit --amend -F text &&
+ (
+ test_set_editor .git/FAKE_EDITOR &&
+ test_must_fail git -c core.commentChar=auto commit --amend
+ )
+'
+
test_done