Move docker client code from dockertools to dockershim/dockerlib

The code affected include DockerInterface (renamed to Interface),
FakeDockerClient, etc.

pkg/kubelet/dockershim/libdocker/kube_docker_client_test.go

@@ -0,0 +1,33 @@
+/*
+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 libdocker
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIsContainerNotFoundError(t *testing.T) {
+	// Expected error message from docker.
+	containerNotFoundError := fmt.Errorf("Error response from daemon: No such container: 96e914f31579e44fe49b239266385330a9b2125abeb9254badd9fca74580c95a")
+	otherError := fmt.Errorf("Error response from daemon: Other errors")
+
+	assert.True(t, IsContainerNotFoundError(containerNotFoundError))
+	assert.False(t, IsContainerNotFoundError(otherError))
+}