implement test_might_fail using a refactored test_must_fail

Add an (optional) first parameter "ok=<special case>" to test_must_fail
and return success for "<special case>". Add "success" as
"<special case>" and use it to implement "test_might_fail". This removes
redundancies in test-lib-function.sh.

You can pass multiple <special case> arguments divided by comma (e.g.
"test_must_fail ok=success,something")

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Jeff King <peff@peff.net>

diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 73e37a1f6c23d00371dbd3f10aee1648e8b947bc..6e954068b87681a2f2cb91929ef48e84882550d9 100644 (file)
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -569,6 +569,21 @@ test_line_count () {
        fi
 }
 
+# Returns success if a comma separated string of keywords ($1) contains a
+# given keyword ($2).
+# Examples:
+# `list_contains "foo,bar" bar` returns 0
+# `list_contains "foo" bar` returns 1
+
+list_contains () {
+       case ",$1," in
+       *,$2,*)
+               return 0
+               ;;
+       esac
+       return 1
+}
+
 # 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:
 #
@@ -582,18 +597,31 @@ 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 test $exit_code -eq 0 && ! list_contains "$_test_ok" success
+       then
                echo >&2 "test_must_fail: command succeeded: $*"
                return 1
-       elif test $exit_code -gt 129 && test $exit_code -le 192; then
+       elif test $exit_code -gt 129 && test $exit_code -le 192
+       then
                echo >&2 "test_must_fail: died by signal: $*"
                return 1
-       elif test $exit_code = 127; then
+       elif test $exit_code -eq 127
+       then
                echo >&2 "test_must_fail: command not found: $*"
                return 1
-       elif test $exit_code = 126; then
+       elif test $exit_code -eq 126
+       then
                echo >&2 "test_must_fail: valgrind error: $*"
                return 1
        fi
@@ -612,16 +640,7 @@ 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