Thread (1 message) 1 message, 1 author, 2016-06-15

Re: [PATCH v4 1/4] add function test_must_fail_or_sigpipe and use it to fix flaky tests

From: Junio C Hamano <hidden>
Date: 2016-06-15 23:07:12
Subsystem: the rest · Maintainer: Linus Torvalds

Possibly related (same subject, not in this thread)

Junio C Hamano [off-list ref] writes:
Adding the third variant in the way this patch does is making things
worse by inviting more mistakes.

How about doing something like the attached to consolidate the
existing two into one, and then build this third one on top?
Actually, I think this other variant I came up with is cleaner and
is more easily extensible.  It already has the support for sigpipe,
e.g. you can do

	test_must_fail ok=sigpipe git fetch ...

Of course, you can do

	test_must_fail_or_sigpipe () {
		test_must_fail ok=sigpipe "$@"
	}

if it is easier to read.  I do not have a very strong opinion either
way.

 t/test-lib-functions.sh | 28 +++++++++++++++++-----------
 1 file changed, 17 insertions(+), 11 deletions(-)
diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index e8d3c0f..b732f87 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -560,11 +560,26 @@ test_line_count () {
 # the failure could be due to a segv.  We want a controlled failure.
 
 test_must_fail () {
+	case "$1" in
+	ok=*)
+		_test_ok=${1#ok=}
+		shift
+		;;
+	*)
+		_test_ok=
+		;;
+	esac
 	"$@"
 	exit_code=$?
-	if test $exit_code = 0; then
+	if ! case ",$_test_ok," in *,success,*) false;; esac &&
+	   test $exit_code = 0
+	then
 		echo >&2 "test_must_fail: command succeeded: $*"
 		return 1
+	elif ! case ",$_test_ok," in *,sigpipe,*) false;; esac &&
+	   test $exit_code = 141
+	then
+		return 0
 	elif test $exit_code -gt 129 && test $exit_code -le 192; then
 		echo >&2 "test_must_fail: died by signal: $*"
 		return 1
@@ -590,16 +605,7 @@ test_must_fail () {
 # because we want to notice if it fails due to segv.
 
 test_might_fail () {
-	"$@"
-	exit_code=$?
-	if test $exit_code -gt 129 && test $exit_code -le 192; then
-		echo >&2 "test_might_fail: died by signal: $*"
-		return 1
-	elif test $exit_code = 127; then
-		echo >&2 "test_might_fail: command not found: $*"
-		return 1
-	fi
-	return 0
+	test_must_fail ok=success "$@"
 }
 
 # Similar to test_must_fail and test_might_fail, but check that a
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