test-lib: add test_config_global variant

The point of test_config is to simultaneously set a config
variable and register its cleanup handler, like:

  test_config core.foo bar

However, it stupidly assumes that $1 contained the name of
the variable, which means it won't work for:

  test_config --global core.foo bar

We could try to parse the command-line ourselves and figure
out which parts need to be fed to test_unconfig. But since
this is likely the most common variant, it's much simpler
and less error-prone to simply add a new function.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/t/test-lib.sh b/t/test-lib.sh
index bdd9513b8..160479b81 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -379,6 +379,11 @@ test_config () {
 	git config "$@"
 }
 
+test_config_global () {
+	test_when_finished "test_unconfig --global '$1'" &&
+	git config --global "$@"
+}
+
 # Use test_set_prereq to tell that a particular prerequisite is available.
 # The prerequisite can later be checked for in two ways:
 #