[PATCH v4 3/4] commit test: test_set_editor in each test

["" <caleb@calebthompson.io>]

t/t7507-commit-verbose.sh was using a global test_set_editor call to
build its environment.

Improve robustness against global state changes by having only tests
which intend to use the $EDITOR to check for presence of a diff in the
editor set up the test-editor to use check-for-diff rather than relying
upon the editor set once at script start.

Besides being in line with current practices, it also allows the tests
which set GIT_EDITOR=cat manually to avoid using a subshell and simplify
their logic.

Signed-off-by: Caleb Thompson <caleb@calebthompson.io>
---
 t/t7507-commit-verbose.sh | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/t/t7507-commit-verbose.sh b/t/t7507-commit-verbose.sh
index db09107..35a4d06 100755
--- a/t/t7507-commit-verbose.sh
+++ b/t/t7507-commit-verbose.sh
@@ -6,7 +6,6 @@ test_description='verbose commit template'
 write_script check-for-diff <<-'EOF'
	exec grep '^diff --git' "$1"
 EOF
-test_set_editor "$PWD/check-for-diff"

 cat >message <<'EOF'
 subject
@@ -21,6 +20,7 @@ test_expect_success 'setup' '
 '

 test_expect_success 'initial commit shows verbose diff' '
+	test_set_editor "$PWD/check-for-diff" &&
	git commit --amend -v
 '

@@ -36,11 +36,13 @@ check_message() {
 }

 test_expect_success 'verbose diff is stripped out' '
+	test_set_editor "$PWD/check-for-diff" &&
	git commit --amend -v &&
	check_message message
 '

 test_expect_success 'verbose diff is stripped out (mnemonicprefix)' '
+	test_set_editor "$PWD/check-for-diff" &&
	test_config diff.mnemonicprefix true &&
	git commit --amend -v &&
	check_message message
@@ -77,20 +79,14 @@ test_expect_success 'submodule log is stripped out too with -v' '
		echo "more" >>file &&
		git commit -a -m "submodule commit"
	) &&
-	(
-		GIT_EDITOR=cat &&
-		export GIT_EDITOR &&
-		test_must_fail git commit -a -v 2>err
-	) &&
+	test_set_editor cat &&
+	test_must_fail git commit -a -v 2>err &&
	test_i18ngrep "Aborting commit due to empty commit message." err
 '

 test_expect_success 'verbose diff is stripped out with set core.commentChar' '
-	(
-		GIT_EDITOR=cat &&
-		export GIT_EDITOR &&
-		test_must_fail git -c core.commentchar=";" commit -a -v 2>err
-	) &&
+	test_set_editor cat &&
+	test_must_fail git -c core.commentchar=";" commit -a -v 2>err &&
	test_i18ngrep "Aborting commit due to empty commit message." err
 '

--
2.0.0