[PATCH v8 4/4] Add a test case for perf script -F +metric

[Andi Kleen <ak@linux.intel.com>]

Sample a noploop workload with cycles and instructions and check if
there is at least one metric being output by perf script.

The output is

% perf test -v 98
98: perf script tests
...
script metric test
[ perf record: Woken up 2 times to write data ]
[ perf record: Captured and wrote 0.429 MB /tmp/perf-test-script.nkvvuzMOla/perf.data (8174 samples) ]
       perf-exec  853636 3967843.162782:        metric:    0.15  insn per cycle
            perf  853636 3967843.163210:        metric:    0.87  insn per cycle
            perf  853636 3967843.163226:        metric:    0.84  insn per cycle
            perf  853636 3967843.163240:        metric:    0.88  insn per cycle
            perf  853636 3967843.163276:        metric:    1.06  insn per cycle
            perf  853636 3967843.163387:        metric:    1.09  insn per cycle
            perf  853636 3967843.163578:        metric:    1.17  insn per cycle
            perf  853636 3967843.164412:        metric:    4.53  insn per cycle
            perf  853636 3967843.164623:        metric:    1.18  insn per cycle
            perf  853636 3967843.164817:        metric:    1.25  insn per cycle
script metric test [Success]
...
%

Signed-off-by: Andi Kleen <ak@linux.intel.com>

----

v2: Avoid bashisms. Use noploop
v3: Avoid false positive in shellcheck
v4: Use :S in the test (Ian, Namhyung)
v5: Update commit message.
---
 tools/perf/tests/shell/script.sh | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tools/perf/tests/shell/script.sh b/tools/perf/tests/shell/script.sh
index c1a603653662..e69c3548583a 100755
--- a/tools/perf/tests/shell/script.sh
+++ b/tools/perf/tests/shell/script.sh
@@ -7,6 +7,7 @@ set -e
 temp_dir=$(mktemp -d /tmp/perf-test-script.XXXXXXXXXX)
 
 perfdatafile="${temp_dir}/perf.data"
+scriptoutput="${temp_dir}/script"
 db_test="${temp_dir}/db_test.py"
 
 err=0
@@ -88,8 +89,21 @@ test_parallel_perf()
 	echo "parallel-perf test [Success]"
 }
 
+test_metric()
+{
+	echo "script metric test"
+	if ! perf list | grep -q cycles ; then return ; fi
+	if ! perf list | grep -q instructions ; then return ; fi
+	perf record -e '{cycles,instructions}:S' -o "${perfdatafile}" perf test -w noploop
+	perf script -i "${perfdatafile}" -F +metric  > $scriptoutput
+	test "`grep -c metric $scriptoutput`" -gt 5
+	grep metric $scriptoutput | head
+	echo "script metric test [Success]"
+}
+
 test_db
 test_parallel_perf
+test_metric
 
 cleanup
 
-- 
2.45.2