Enable `helmfile test` testing only enabled and selected releases (#1486)

Resolves #1483

pkg/app/app.go

@@ -390,7 +390,7 @@ func (a *App) Test(c TestConfigProvider) error {
 		err := run.withPreparedCharts("test", state.ChartPrepareOptions{
 			SkipRepos: true,
 		}, func() {
-			errs = run.Test(c)
+			errs = a.test(run, c)
 		})
 
 		if err != nil {

pkg/app/run.go

@@ -161,14 +161,29 @@ func (a *App) diff(r *Run, c DiffConfigProvider) (*string, bool, bool, []error)
 	return infoMsg, true, len(deleted) > 0 || len(updated) > 0, errs
 }
 
-func (r *Run) Test(c TestConfigProvider) []error {
+func (a *App) test(r *Run, c TestConfigProvider) []error {
 	cleanup := c.Cleanup()
 	timeout := c.Timeout()
 	concurrency := c.Concurrency()
 
+	st := r.state
+
+	toTest, err := a.getSelectedReleases(r)
+	if err != nil {
+		return []error{err}
+	}
+
+	if len(toTest) == 0 {
+		return nil
+	}
+
+	// Do test only on selected releases, because that's what the user intended
+	// with conditions and selectors
+	st.Releases = toTest
+
 	r.helm.SetExtraArgs(argparser.GetArgs(c.Args(), r.state)...)
 
-	return r.state.TestReleases(r.helm, cleanup, timeout, concurrency)
+	return st.TestReleases(r.helm, cleanup, timeout, concurrency)
 }
 
 func (r *Run) Lint(c LintConfigProvider) []error {