// The test is completely skipped if ISTIO_TEST_EXTRA_REVISIONS is not set
// To run, add each revision to test. eg `ISTIO_TEST_EXTRA_REVISIONS=canary,my-rev`.
func TestRevisionTraffic(t *testing.T) {
	rawExtraRevs, f := os.LookupEnv("ISTIO_TEST_EXTRA_REVISIONS")
	if !f {
		t.Skip("ISTIO_TEST_EXTRA_REVISIONS not specified")
	}
	extraRevs := strings.Split(rawExtraRevs, ",")