fix test command for helm 3 (#1080)

pkg/app/app.go

@@ -168,6 +168,11 @@ func (a *App) Destroy(c DestroyConfigProvider) error {
 }
 
 func (a *App) Test(c TestConfigProvider) error {
+	if c.Cleanup() && a.helmExecer.IsHelm3() {
+		a.Logger.Warnf("warn: requested cleanup will not be applied. " +
+			"To clean up test resources with Helm 3, you have to remove them manually " +
+			"or set helm.sh/hook-delete-policy\n")
+	}
 	return a.ForEachStateFiltered(func(run *Run) []error {
 		return run.Test(c)
 	})

pkg/state/state.go

@@ -1206,7 +1206,10 @@ func (st *HelmState) TestReleases(helm helmexec.Interface, cleanup bool, timeout
 		}
 
 		flags := []string{}
-		if cleanup {
+		if helm.IsHelm3() && release.Namespace != "" {
+			flags = append(flags, "--namespace", release.Namespace)
+		}
+		if cleanup && !helm.IsHelm3() {
 			flags = append(flags, "--cleanup")
 		}
 		duration := strconv.Itoa(timeout)