[PATCH v2] tests: print failed test numbers at the end of the test run

[Jens Lehmann <Jens.Lehmann@web.de>]

On modern multi-core processors "make test" is often run in multiple jobs.
If one of them fails the test run does stop, but the concurrently running
tests finish their run. It is rather easy to find out which test failed by
doing a "ls -d t/trash*". But that only works when you don't use the "-i"
option to "make test" because you want to get an overview of all failing
tests. In that case all thrash directories are deleted end and the
information which tests failed is lost.

If one or more tests failed, print a list of them before the test summary:

failed test(s): t1000 t6500

fixed   0
success 7638
failed  3
broken  49
total   7723

This makes it possible to just run the test suite with -i and collect all
failed test scripts at the end for further examination.

Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
---

Am 24.07.2011 09:41, schrieb Junio C Hamano:
> Jens Lehmann <Jens.Lehmann@web.de> writes:
> 
>> Maybe I'm missing something completely obvious, but I always have a hard
>> time finding out which test scripts did fail in a test run with -j30.
> 
> I run "ls -d t/trash*" for that ;-)

Yup. But that won't work when you use "-i" to continue to run all tests
even when some fail, as all trash directories get deleted in the end. Or
did I manage to overlook an option which stops that? ;-)

I rephrased the commit message to make it clear my patch only changes the
behavior when "-i" is used and one or more tests fail, as the code in
question isn't executed otherwise.

>> +			if test $value != 0; then
>> +				testnum=$(echo $file | cut -b 14-18)
>> +				failed_tests="$failed_tests $testnum"
>> +			fi
> 
> Somehow "cut" here feels dirty, as it hardcodes a mysterious offset that
> cannot be guessed without knowing what string it is cutting from by
> looking at t/Makefile.
> 
> 	testnum=$(expr "$file" : 'test-results/\(t[0-9]*\)-')

Thanks, this version is using that expression.


 t/aggregate-results.sh |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/t/aggregate-results.sh b/t/aggregate-results.sh
index d206b7c..60465fa 100755
--- a/t/aggregate-results.sh
+++ b/t/aggregate-results.sh
@@ -1,5 +1,6 @@
 #!/bin/sh

+failed_tests=
 fixed=0
 success=0
 failed=0
@@ -18,7 +19,12 @@ do
 		success)
 			success=$(($success + $value)) ;;
 		failed)
-			failed=$(($failed + $value)) ;;
+			failed=$(($failed + $value))
+			if test $value != 0; then
+				testnum=$(expr "$file" : 'test-results/\(t[0-9]*\)-')
+				failed_tests="$failed_tests $testnum"
+			fi
+			;;
 		broken)
 			broken=$(($broken + $value)) ;;
 		total)
@@ -27,6 +33,10 @@ do
 	done <"$file"
 done

+if [ -n "$failed_tests" ]; then
+	printf "\nfailed test(s):$failed_tests\n\n"
+fi
+
 printf "%-8s%d\n" fixed $fixed
 printf "%-8s%d\n" success $success
 printf "%-8s%d\n" failed $failed
-- 
1.7.6.346.g940def.dirty