add test_cmp function for test scripts
Many scripts compare actual and expected output using
"diff -u". This is nicer than "cmp" because the output shows
how the two differ. However, not all versions of diff
understand -u, leading to unnecessary test failure.
This adds a test_cmp function to the test scripts and
switches all "diff -u" invocations to use it. The function
uses the contents of "$GIT_TEST_CMP" to compare its
arguments; the default is "diff -u".
On systems with a less-capable diff, you can do:
GIT_TEST_CMP=cmp make test
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t8003-blame.sh b/t/t8003-blame.sh
index db51b3a..966bb0a 100755
--- a/t/t8003-blame.sh
+++ b/t/t8003-blame.sh
@@ -112,7 +112,7 @@
echo mouse-Second
echo mouse-Third
} >expected &&
- diff -u expected current
+ test_cmp expected current
'
@@ -125,7 +125,7 @@
echo cow-Fifth
echo mouse-Third
} >expected &&
- diff -u expected current
+ test_cmp expected current
'
