[GUILT v4 09/33] Test suite: properly check the exit status of commands.

[Per Cederqvist <cederp@opera.com>]

The "cmd" and "shouldfail" functions checked the exit status of the
replace_path function instead of the actual command that was running.
(The $? construct checks the exit status of the last command in a
pipeline, not the first command.)

Print an explicit error message if a command that should fail actually
succeeds.

Updated t-032.sh, which used "shouldfail" instead of "cmd" in one
place.  (The comment in the script makes it clear that the command is
expected to succeed.)

Signed-off-by: Per Cederqvist <cederp@opera.com>
---
 regression/scaffold | 23 ++++++++++++++++-------
 regression/t-032.sh |  2 +-
 2 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/regression/scaffold b/regression/scaffold
index 5c8b73e..2e04c83 100644
--- a/regression/scaffold
+++ b/regression/scaffold
@@ -51,19 +51,28 @@ function filter_dd
 function cmd
 {
 	echo "% $@"
-	"$@" 2>&1 | replace_path && return 0
-	return 1
+	if ! (
+		exec 3>&1
+		rv=`(("$@" 2>&1; echo $? >&4) | replace_path >&3 ) 4>&1`
+		exit $rv
+	) ; then
+		echo "% FAIL: The above command should succeed but failed."
+		exit 1
+	fi
 }
 
 # usage: shouldfail <cmd>..
 function shouldfail
 {
 	echo "% $@"
-	(
-		"$@" 2>&1 || return 0
-		return 1
-	) | replace_path
-	return $?
+	if (
+		exec 3>&1
+		rv=`(("$@" 2>&1; echo $? >&4) | replace_path >&3 ) 4>&1`
+		exit $rv
+	) ; then
+		echo "% FAIL: The above command should fail but succeeded."
+		exit 1
+	fi
 }
 
 # usage: list_files
diff --git a/regression/t-032.sh b/regression/t-032.sh
index b1d5f19..bba401e 100755
--- a/regression/t-032.sh
+++ b/regression/t-032.sh
@@ -28,7 +28,7 @@ shouldfail guilt import -P foo3 foo
 cmd guilt import -P foo2 foo
 
 # ok
-shouldfail guilt import foo
+cmd guilt import foo
 
 # duplicate patch name (implicit)
 shouldfail guilt import foo
-- 
1.8.3.1