vendor files

vendor/k8s.io/kubernetes/test/e2e/common/events.go

@@ -0,0 +1,152 @@
+/*
+Copyright 2016 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 common
+
+import (
+	"fmt"
+	"sync"
+	"time"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/fields"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/util/wait"
+	"k8s.io/apimachinery/pkg/watch"
+	"k8s.io/client-go/tools/cache"
+	"k8s.io/kubernetes/test/e2e/framework"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+type Action func() error
+
+// Returns true if a node update matching the predicate was emitted from the
+// system after performing the supplied action.
+func ObserveNodeUpdateAfterAction(f *framework.Framework, nodeName string, nodePredicate func(*v1.Node) bool, action Action) (bool, error) {
+	observedMatchingNode := false
+	nodeSelector := fields.OneTermEqualSelector("metadata.name", nodeName)
+	informerStartedChan := make(chan struct{})
+	var informerStartedGuard sync.Once
+
+	_, controller := cache.NewInformer(
+		&cache.ListWatch{
+			ListFunc: func(options metav1.ListOptions) (runtime.Object, error) {
+				options.FieldSelector = nodeSelector.String()
+				ls, err := f.ClientSet.CoreV1().Nodes().List(options)
+				return ls, err
+			},
+			WatchFunc: func(options metav1.ListOptions) (watch.Interface, error) {
+				// Signal parent goroutine that watching has begun.
+				defer informerStartedGuard.Do(func() { close(informerStartedChan) })
+				options.FieldSelector = nodeSelector.String()
+				w, err := f.ClientSet.CoreV1().Nodes().Watch(options)
+				return w, err
+			},
+		},
+		&v1.Node{},
+		0,
+		cache.ResourceEventHandlerFuncs{
+			UpdateFunc: func(oldObj, newObj interface{}) {
+				n, ok := newObj.(*v1.Node)
+				Expect(ok).To(Equal(true))
+				if nodePredicate(n) {
+					observedMatchingNode = true
+				}
+			},
+		},
+	)
+
+	// Start the informer and block this goroutine waiting for the started signal.
+	informerStopChan := make(chan struct{})
+	defer func() { close(informerStopChan) }()
+	go controller.Run(informerStopChan)
+	<-informerStartedChan
+
+	// Invoke the action function.
+	err := action()
+	if err != nil {
+		return false, err
+	}
+
+	// Poll whether the informer has found a matching node update with a timeout.
+	// Wait up 2 minutes polling every second.
+	timeout := 2 * time.Minute
+	interval := 1 * time.Second
+	err = wait.Poll(interval, timeout, func() (bool, error) {
+		return observedMatchingNode, nil
+	})
+	return err == nil, err
+}
+
+// Returns true if an event matching the predicate was emitted from the system
+// after performing the supplied action.
+func ObserveEventAfterAction(f *framework.Framework, eventPredicate func(*v1.Event) bool, action Action) (bool, error) {
+	observedMatchingEvent := false
+	informerStartedChan := make(chan struct{})
+	var informerStartedGuard sync.Once
+
+	// Create an informer to list/watch events from the test framework namespace.
+	_, controller := cache.NewInformer(
+		&cache.ListWatch{
+			ListFunc: func(options metav1.ListOptions) (runtime.Object, error) {
+				ls, err := f.ClientSet.CoreV1().Events(f.Namespace.Name).List(options)
+				return ls, err
+			},
+			WatchFunc: func(options metav1.ListOptions) (watch.Interface, error) {
+				// Signal parent goroutine that watching has begun.
+				defer informerStartedGuard.Do(func() { close(informerStartedChan) })
+				w, err := f.ClientSet.CoreV1().Events(f.Namespace.Name).Watch(options)
+				return w, err
+			},
+		},
+		&v1.Event{},
+		0,
+		cache.ResourceEventHandlerFuncs{
+			AddFunc: func(obj interface{}) {
+				e, ok := obj.(*v1.Event)
+				By(fmt.Sprintf("Considering event: \nType = [%s], Name = [%s], Reason = [%s], Message = [%s]", e.Type, e.Name, e.Reason, e.Message))
+				Expect(ok).To(Equal(true))
+				if ok && eventPredicate(e) {
+					observedMatchingEvent = true
+				}
+			},
+		},
+	)
+
+	// Start the informer and block this goroutine waiting for the started signal.
+	informerStopChan := make(chan struct{})
+	defer func() { close(informerStopChan) }()
+	go controller.Run(informerStopChan)
+	<-informerStartedChan
+
+	// Invoke the action function.
+	err := action()
+	if err != nil {
+		return false, err
+	}
+
+	// Poll whether the informer has found a matching event with a timeout.
+	// Wait up 2 minutes polling every second.
+	timeout := 2 * time.Minute
+	interval := 1 * time.Second
+	err = wait.Poll(interval, timeout, func() (bool, error) {
+		return observedMatchingEvent, nil
+	})
+	return err == nil, err
+}