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// Copyright 2014 Google Inc. 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 container_test
import (
"testing"
"github.com/google/cadvisor/container"
containertest "github.com/google/cadvisor/container/testing"
"github.com/google/cadvisor/watcher"
"github.com/stretchr/testify/mock"
)
type mockContainerHandlerFactory struct {
mock.Mock
Name string
CanHandleValue bool
CanAcceptValue bool
}
func (f *mockContainerHandlerFactory) String() string {
return f.Name
}
func (f *mockContainerHandlerFactory) DebugInfo() map[string][]string {
return map[string][]string{}
}
func (f *mockContainerHandlerFactory) CanHandleAndAccept(name string) (bool, bool, error) {
return f.CanHandleValue, f.CanAcceptValue, nil
}
func (f *mockContainerHandlerFactory) NewContainerHandler(name string, isHostNamespace bool) (container.ContainerHandler, error) {
args := f.Called(name)
return args.Get(0).(container.ContainerHandler), args.Error(1)
}
const testContainerName = "/test"
var mockFactory containertest.FactoryForMockContainerHandler
func TestNewContainerHandler_FirstMatches(t *testing.T) {
container.ClearContainerHandlerFactories()
// Register one allways yes factory.
allwaysYes := &mockContainerHandlerFactory{
Name: "yes",
CanHandleValue: true,
CanAcceptValue: true,
}
container.RegisterContainerHandlerFactory(allwaysYes, []watcher.ContainerWatchSource{watcher.Raw})
// The yes factory should be asked to create the ContainerHandler.
mockContainer, err := mockFactory.NewContainerHandler(testContainerName, true)
if err != nil {
t.Error(err)
}
allwaysYes.On("NewContainerHandler", testContainerName).Return(mockContainer, nil)
cont, _, err := container.NewContainerHandler(testContainerName, watcher.Raw, true)
if err != nil {
t.Error(err)
}
if cont == nil {
t.Error("Expected container to not be nil")
}
}
func TestNewContainerHandler_SecondMatches(t *testing.T) {
container.ClearContainerHandlerFactories()
// Register one allways no and one always yes factory.
allwaysNo := &mockContainerHandlerFactory{
Name: "no",
CanHandleValue: false,
CanAcceptValue: true,
}
container.RegisterContainerHandlerFactory(allwaysNo, []watcher.ContainerWatchSource{watcher.Raw})
allwaysYes := &mockContainerHandlerFactory{
Name: "yes",
CanHandleValue: true,
CanAcceptValue: true,
}
container.RegisterContainerHandlerFactory(allwaysYes, []watcher.ContainerWatchSource{watcher.Raw})
// The yes factory should be asked to create the ContainerHandler.
mockContainer, err := mockFactory.NewContainerHandler(testContainerName, true)
if err != nil {
t.Error(err)
}
allwaysYes.On("NewContainerHandler", testContainerName).Return(mockContainer, nil)
cont, _, err := container.NewContainerHandler(testContainerName, watcher.Raw, true)
if err != nil {
t.Error(err)
}
if cont == nil {
t.Error("Expected container to not be nil")
}
}
func TestNewContainerHandler_NoneMatch(t *testing.T) {
container.ClearContainerHandlerFactories()
// Register two allways no factories.
allwaysNo1 := &mockContainerHandlerFactory{
Name: "no",
CanHandleValue: false,
CanAcceptValue: true,
}
container.RegisterContainerHandlerFactory(allwaysNo1, []watcher.ContainerWatchSource{watcher.Raw})
allwaysNo2 := &mockContainerHandlerFactory{
Name: "no",
CanHandleValue: false,
CanAcceptValue: true,
}
container.RegisterContainerHandlerFactory(allwaysNo2, []watcher.ContainerWatchSource{watcher.Raw})
_, _, err := container.NewContainerHandler(testContainerName, watcher.Raw, true)
if err == nil {
t.Error("Expected NewContainerHandler to fail")
}
}
func TestNewContainerHandler_Accept(t *testing.T) {
container.ClearContainerHandlerFactories()
// Register handler that can handle the container, but can't accept it.
cannotHandle := &mockContainerHandlerFactory{
Name: "no",
CanHandleValue: false,
CanAcceptValue: true,
}
container.RegisterContainerHandlerFactory(cannotHandle, []watcher.ContainerWatchSource{watcher.Raw})
cannotAccept := &mockContainerHandlerFactory{
Name: "no",
CanHandleValue: true,
CanAcceptValue: false,
}
container.RegisterContainerHandlerFactory(cannotAccept, []watcher.ContainerWatchSource{watcher.Raw})
_, accept, err := container.NewContainerHandler(testContainerName, watcher.Raw, true)
if err != nil {
t.Error("Expected NewContainerHandler to succeed")
}
if accept == true {
t.Error("Expected NewContainerHandler to ignore the container.")
}
}
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