test-lib-functions.sh: add lf_to_nul helper

diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 90856d67e52dcdaabd13e78abd29c7c3d3949643..fdaeb3a96bed361f53030cb6ea5c6bdde445163f 100644 (file)
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -81,6 +81,10 @@ test_decode_color () {
        '
 }
 
+lf_to_nul () {
+       perl -pe 'y/\012/\000/'
+}
+
 nul_to_q () {
        perl -pe 'y/\000/Q/'
 }
@@ -612,7 +616,7 @@ test_must_fail () {
        then
                echo >&2 "test_must_fail: command succeeded: $*"
                return 1
-       elif test $exit_code -eq 141 && list_contains "$_test_ok" sigpipe
+       elif test_match_signal 13 $exit_code && list_contains "$_test_ok" sigpipe
        then
                return 0
        elif test $exit_code -gt 129 && test $exit_code -le 192
@@ -962,6 +966,21 @@ test_env () {
        )
 }
 
+# Returns true if the numeric exit code in "$2" represents the expected signal
+# in "$1". Signals should be given numerically.
+test_match_signal () {
+       if test "$2" = "$((128 + $1))"
+       then
+               # POSIX
+               return 0
+       elif test "$2" = "$((256 + $1))"
+       then
+               # ksh
+               return 0
+       fi
+       return 1
+}
+
 # Read up to "$1" bytes (or to EOF) from stdin and write them to stdout.
 test_copy_bytes () {
        perl -e '