add TestPopReleaseLock

pkg/controller/framework/processor_listener_test.go

+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 framework
+
+import (
+	"testing"
+	"time"
+
+	"k8s.io/kubernetes/pkg/util/wait"
+)
+
+// TestPopReleaseLock tests that when processor listener blocks on chan,
+// it should release the lock for pendingNotifications.
+func TestPopReleaseLock(t *testing.T) {
+	pl := newProcessListener(nil)
+	stopCh := make(chan struct{})
+	defer close(stopCh)
+	// make pop() block on nextCh: waiting for receiver to get notification.
+	pl.add(1)
+	go pl.pop(stopCh)
+
+	resultCh := make(chan struct{})
+	go func() {
+		pl.lock.Lock()
+		close(resultCh)
+	}()
+
+	select {
+	case <-resultCh:
+	case <-time.After(wait.ForeverTestTimeout):
+		t.Errorf("Timeout after %v", wait.ForeverTestTimeout)
+	}
+	pl.lock.Unlock()
+}