Add unit test.

Signed-off-by: Lantao Liu <lantaol@google.com>

pkg/server/events_test.go

@@ -0,0 +1,154 @@
+/*
+Copyright 2017 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 server
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/containerd/containerd/api/services/execution"
+	"github.com/containerd/containerd/api/types/container"
+	"github.com/stretchr/testify/assert"
+	"golang.org/x/net/context"
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+
+	"github.com/kubernetes-incubator/cri-containerd/pkg/metadata"
+	servertesting "github.com/kubernetes-incubator/cri-containerd/pkg/server/testing"
+)
+
+func TestHandleEvent(t *testing.T) {
+	testID := "test-id"
+	testPid := uint32(1234)
+	testCreatedAt := time.Now().UnixNano()
+	testStartedAt := time.Now().UnixNano()
+	// Container metadata in running state.
+	testMetadata := metadata.ContainerMetadata{
+		ID:        testID,
+		Name:      "test-name",
+		SandboxID: "test-sandbox-id",
+		Pid:       testPid,
+		CreatedAt: testCreatedAt,
+		StartedAt: testStartedAt,
+	}
+	testExitedAt := time.Now()
+	testExitEvent := container.Event{
+		ID:         testID,
+		Type:       container.Event_EXIT,
+		Pid:        testPid,
+		ExitStatus: 1,
+		ExitedAt:   testExitedAt,
+	}
+	testFinishedMetadata := metadata.ContainerMetadata{
+		ID:         testID,
+		Name:       "test-name",
+		SandboxID:  "test-sandbox-id",
+		Pid:        0,
+		CreatedAt:  testCreatedAt,
+		StartedAt:  testStartedAt,
+		FinishedAt: testExitedAt.UnixNano(),
+		ExitCode:   1,
+	}
+	assert.Equal(t, runtime.ContainerState_CONTAINER_RUNNING, testMetadata.State())
+	testContainerdContainer := container.Container{
+		ID:     testID,
+		Pid:    testPid,
+		Status: container.Status_RUNNING,
+	}
+
+	for desc, test := range map[string]struct {
+		event               *container.Event
+		metadata            *metadata.ContainerMetadata
+		containerdContainer *container.Container
+		containerdErr       error
+		expected            *metadata.ContainerMetadata
+	}{
+		"should not update state when no corresponding metadata for event": {
+			event:    &testExitEvent,
+			expected: nil,
+		},
+		"should not update state when exited process is not init process": {
+			event: &container.Event{
+				ID:         testID,
+				Type:       container.Event_EXIT,
+				Pid:        9999,
+				ExitStatus: 1,
+				ExitedAt:   testExitedAt,
+			},
+			metadata:            &testMetadata,
+			containerdContainer: &testContainerdContainer,
+			expected:            &testMetadata,
+		},
+		"should not update state when fail to delete containerd container": {
+			event:               &testExitEvent,
+			metadata:            &testMetadata,
+			containerdContainer: &testContainerdContainer,
+			containerdErr:       fmt.Errorf("random error"),
+			expected:            &testMetadata,
+		},
+		"should not update state for non-exited events": {
+			event: &container.Event{
+				ID:         testID,
+				Type:       container.Event_OOM,
+				Pid:        testPid,
+				ExitStatus: 1,
+				ExitedAt:   testExitedAt,
+			},
+			metadata:            &testMetadata,
+			containerdContainer: &testContainerdContainer,
+			expected:            &testMetadata,
+		},
+		"should update state when containerd container is already deleted": {
+			event:    &testExitEvent,
+			metadata: &testMetadata,
+			expected: &testFinishedMetadata,
+		},
+		"should update state when delete containerd container successfully": {
+			event:               &testExitEvent,
+			metadata:            &testMetadata,
+			containerdContainer: &testContainerdContainer,
+			expected:            &testFinishedMetadata,
+		},
+	} {
+		t.Logf("TestCase %q", desc)
+		c := newTestCRIContainerdService()
+		fake := c.containerService.(*servertesting.FakeExecutionClient)
+		e, err := fake.Events(context.Background(), &execution.EventsRequest{})
+		assert.NoError(t, err)
+		fakeEvents := e.(*servertesting.EventClient)
+		// Inject event.
+		if test.event != nil {
+			fakeEvents.Events <- test.event
+		}
+		// Inject metadata.
+		if test.metadata != nil {
+			// Make sure that original data will not be changed.
+			assert.NoError(t, c.containerStore.Create(*test.metadata))
+		}
+		// Inject containerd container.
+		if test.containerdContainer != nil {
+			fake.SetFakeContainers([]container.Container{*test.containerdContainer})
+		}
+		// Inject containerd delete error.
+		if test.containerdErr != nil {
+			fake.InjectError("delete", test.containerdErr)
+		}
+		c.handleEventStream(e)
+		got, _ := c.containerStore.Get(testID)
+		assert.Equal(t, test.expected, got)
+	}
+}