Refactoring runner

pkg/util/async/runner_test.go

@@ -0,0 +1,55 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"fmt"
+	"sync"
+	"testing"
+)
+
+func TestRunner(t *testing.T) {
+	var (
+		lock   sync.Mutex
+		events []string
+		funcs  []func(chan struct{})
+	)
+	done := make(chan struct{}, 20)
+	for i := 0; i < 10; i++ {
+		iCopy := i
+		funcs = append(funcs, func(c chan struct{}) {
+			lock.Lock()
+			events = append(events, fmt.Sprintf("%v starting\n", iCopy))
+			lock.Unlock()
+			<-c
+			lock.Lock()
+			events = append(events, fmt.Sprintf("%v stopping\n", iCopy))
+			lock.Unlock()
+			done <- struct{}{}
+		})
+	}
+
+	r := NewRunner(funcs...)
+	r.Start()
+	r.Stop()
+	for i := 0; i < 10; i++ {
+		<-done
+	}
+	if len(events) != 20 {
+		t.Errorf("expected 20 events, but got:\n%v\n", events)
+	}
+}