Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/k8s.io/kubernetes/pkg/kubelet/container/cache_test.go

@@ -0,0 +1,210 @@
+/*
+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 container
+
+import (
+	"fmt"
+	"strconv"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"k8s.io/apimachinery/pkg/types"
+)
+
+func newTestCache() *cache {
+	c := NewCache()
+	return c.(*cache)
+}
+
+func TestCacheNotInitialized(t *testing.T) {
+	cache := newTestCache()
+	// If the global timestamp is not set, always return nil.
+	d := cache.getIfNewerThan(types.UID("1234"), time.Time{})
+	assert.True(t, d == nil, "should return nil since cache is not initialized")
+}
+
+func getTestPodIDAndStatus(numContainers int) (types.UID, *PodStatus) {
+	id := types.UID(strconv.FormatInt(time.Now().UnixNano(), 10))
+	name := fmt.Sprintf("cache-foo-%s", string(id))
+	namespace := "ns"
+	var status *PodStatus
+	if numContainers > 0 {
+		status = &PodStatus{ID: id, Name: name, Namespace: namespace}
+	} else {
+		status = &PodStatus{ID: id}
+	}
+	for i := 0; i < numContainers; i++ {
+		status.ContainerStatuses = append(status.ContainerStatuses, &ContainerStatus{Name: string(i)})
+	}
+	return id, status
+}
+
+func TestGetIfNewerThanWhenPodExists(t *testing.T) {
+	cache := newTestCache()
+	timestamp := time.Now()
+
+	cases := []struct {
+		cacheTime time.Time
+		modified  time.Time
+		expected  bool
+	}{
+		{
+			// Both the global cache timestamp and the modified time are newer
+			// than the timestamp.
+			cacheTime: timestamp.Add(time.Second),
+			modified:  timestamp,
+			expected:  true,
+		},
+		{
+			// Global cache timestamp is newer, but the pod entry modified
+			// time is older than the given timestamp. This means that the
+			// entry is up-to-date even though it hasn't changed for a while.
+			cacheTime: timestamp.Add(time.Second),
+			modified:  timestamp.Add(-time.Second * 10),
+			expected:  true,
+		},
+		{
+			// Global cache timestamp is older, but the pod entry modified
+			// time is newer than the given timestamp. This means that the
+			// entry is up-to-date but the rest of the cache are still being
+			// updated.
+			cacheTime: timestamp.Add(-time.Second),
+			modified:  timestamp.Add(time.Second * 3),
+			expected:  true,
+		},
+		{
+			// Both the global cache timestamp and the modified time are older
+			// than the given timestamp.
+			cacheTime: timestamp.Add(-time.Second),
+			modified:  timestamp.Add(-time.Second),
+			expected:  false,
+		},
+	}
+	for i, c := range cases {
+		podID, status := getTestPodIDAndStatus(2)
+		cache.UpdateTime(c.cacheTime)
+		cache.Set(podID, status, nil, c.modified)
+		d := cache.getIfNewerThan(podID, timestamp)
+		assert.Equal(t, c.expected, d != nil, "test[%d]", i)
+	}
+}
+
+func TestGetPodNewerThanWhenPodDoesNotExist(t *testing.T) {
+	cache := newTestCache()
+	cacheTime := time.Now()
+	cache.UpdateTime(cacheTime)
+	podID := types.UID("1234")
+
+	cases := []struct {
+		timestamp time.Time
+		expected  bool
+	}{
+		{
+			timestamp: cacheTime.Add(-time.Second),
+			expected:  true,
+		},
+		{
+			timestamp: cacheTime.Add(time.Second),
+			expected:  false,
+		},
+	}
+	for i, c := range cases {
+		d := cache.getIfNewerThan(podID, c.timestamp)
+		assert.Equal(t, c.expected, d != nil, "test[%d]", i)
+	}
+}
+
+func TestCacheSetAndGet(t *testing.T) {
+	cache := NewCache()
+	cases := []struct {
+		numContainers int
+		error         error
+	}{
+		{numContainers: 3, error: nil},
+		{numContainers: 2, error: fmt.Errorf("unable to get status")},
+		{numContainers: 0, error: nil},
+	}
+	for i, c := range cases {
+		podID, status := getTestPodIDAndStatus(c.numContainers)
+		cache.Set(podID, status, c.error, time.Time{})
+		// Read back the status and error stored in cache and make sure they
+		// match the original ones.
+		actualStatus, actualErr := cache.Get(podID)
+		assert.Equal(t, status, actualStatus, "test[%d]", i)
+		assert.Equal(t, c.error, actualErr, "test[%d]", i)
+	}
+}
+
+func TestCacheGetPodDoesNotExist(t *testing.T) {
+	cache := NewCache()
+	podID, status := getTestPodIDAndStatus(0)
+	// If the pod does not exist in cache, cache should return an status
+	// object with id filled.
+	actualStatus, actualErr := cache.Get(podID)
+	assert.Equal(t, status, actualStatus)
+	assert.Equal(t, nil, actualErr)
+}
+
+func TestDelete(t *testing.T) {
+	cache := &cache{pods: map[types.UID]*data{}}
+	// Write a new pod status into the cache.
+	podID, status := getTestPodIDAndStatus(3)
+	cache.Set(podID, status, nil, time.Time{})
+	actualStatus, actualErr := cache.Get(podID)
+	assert.Equal(t, status, actualStatus)
+	assert.Equal(t, nil, actualErr)
+	// Delete the pod from cache, and verify that we get an empty status.
+	cache.Delete(podID)
+	expectedStatus := &PodStatus{ID: podID}
+	actualStatus, actualErr = cache.Get(podID)
+	assert.Equal(t, expectedStatus, actualStatus)
+	assert.Equal(t, nil, actualErr)
+}
+
+func verifyNotification(t *testing.T, ch chan *data, expectNotification bool) {
+	if expectNotification {
+		assert.True(t, len(ch) > 0, "Did not receive notification")
+	} else {
+		assert.True(t, len(ch) < 1, "Should not have triggered the notification")
+	}
+	// Drain the channel.
+	for i := 0; i < len(ch); i++ {
+		<-ch
+	}
+}
+
+func TestRegisterNotification(t *testing.T) {
+	cache := newTestCache()
+	cacheTime := time.Now()
+	cache.UpdateTime(cacheTime)
+
+	podID, status := getTestPodIDAndStatus(1)
+	ch := cache.subscribe(podID, cacheTime.Add(time.Second))
+	verifyNotification(t, ch, false)
+	cache.Set(podID, status, nil, cacheTime.Add(time.Second))
+	// The Set operation should've triggered the notification.
+	verifyNotification(t, ch, true)
+
+	podID, _ = getTestPodIDAndStatus(1)
+
+	ch = cache.subscribe(podID, cacheTime.Add(time.Second))
+	verifyNotification(t, ch, false)
+	cache.UpdateTime(cacheTime.Add(time.Second * 2))
+	// The advance of cache timestamp should've triggered the notification.
+	verifyNotification(t, ch, true)
+}