[PATCH 2/6] Fix tests to work with core.autocrlf=true

[Don Slutz <Don.Slutz@SierraAtlantic.com>]

test-lib changes.

Run the tests via:

  GIT_TEST_AUTO_CRLF=true make test

Change the default value of GIT_TEST_CMP to ignore whitespace changes
when core.autocrlf=true

Add support functions: test_external_with_only_warning, test_eq_cat,
test_cat_eq, and test_ne_cat all of which will ignore CR if it is in
the file.

Signed-off-by: Don Slutz <Don.Slutz@SierraAtlantic.com>
---
 t/test-lib.sh |   59 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 58 insertions(+), 1 deletions(-)

diff --git a/t/test-lib.sh b/t/test-lib.sh
index 218bd82..84846cd 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -59,7 +59,6 @@ export GIT_MERGE_VERBOSITY
 export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
 export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
 export EDITOR VISUAL
-GIT_TEST_CMP=${GIT_TEST_CMP:-diff -u}
 
 # Protect ourselves from common misconfiguration to export
 # CDPATH into the environment
@@ -129,6 +128,11 @@ case $(uname -s) in
 *)
 	;;
 esac
+if test ! -z $GIT_TEST_AUTO_CRLF && test $GIT_TEST_AUTO_CRLF = true; then
+	GIT_TEST_CMP=${GIT_TEST_CMP:-diff -uw}
+else
+	GIT_TEST_CMP=${GIT_TEST_CMP:-diff -u}
+fi
 
 if test -n "$color"; then
 	say_color () {
@@ -459,6 +463,35 @@ test_external_without_stderr () {
 	fi
 }
 
+# Like test_external, but in addition tests that the command generated
+# only "warning: LF will be replaced by CRLF" output on stderr.
+test_external_with_only_warning () {
+	# The temporary file has no (and must have no) security
+	# implications.
+	tmp="$TMPDIR"; if [ -z "$tmp" ]; then tmp=/tmp; fi
+	stderr="$tmp/git-external-stderr.$$.tmp"
+	test_external "$@" 4> "$stderr"
+	[ -f "$stderr" ] || error "Internal error: $stderr disappeared."
+	descr="only warning: $1"
+	shift
+	say >&3 "expecting only warnings from previous command"
+	output=$(grep -v "warning: LF will be replaced by CRLF in" $stderr)
+	test_debug "echo non-warning: $output"
+	if [ -z "$output" ]; then
+		rm "$stderr"
+		test_ok_ "$descr"
+	else
+		if [ "$verbose" = t ]; then
+			output=`echo; echo Stderr is:; cat "$stderr"`
+		else
+			output=
+		fi
+		# rm first in case test_failure exits.
+		rm "$stderr"
+		test_failure_ "$descr" "$@" "$output"
+	fi
+}
+
 # This is not among top-level (test_expect_success | test_expect_failure)
 # but is a prefix that can be used in the test script, like:
 #
@@ -493,6 +526,30 @@ test_cmp() {
 	$GIT_TEST_CMP "$@"
 }
 
+# test_eq_cat is a helper function to compare a 1 word file
+# with a string.
+# It almost the same as: test foo = $(cat bar)
+# for: test_eq_cat foo bar
+#
+# However it works when core.autocrlf = true.
+
+test_eq_cat() {
+	test "$1" = "$(tr '\015' '\012' < "$2")"
+}
+
+# the but not-equal -- may not catch all cases
+
+test_ne_cat() {
+	test "$1" != "$(tr '\015' '\012' < "$2")"
+}
+
+# the same as test_eq_cat, but file is 1st.
+
+test_cat_eq() {
+	test "$(tr '\015' '\012' < "$1")" = "$2"
+}
+
+
 # Most tests can use the created repository, but some may need to create more.
 # Usage: test_create_repo <directory>
 test_create_repo () {
-- 
1.6.3.15.g49878