First commit

pkg/registry/replication_controller_test.go

@@ -0,0 +1,311 @@
+/*
+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 registry
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http/httptest"
+	"reflect"
+	"testing"
+
+	. "github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	. "github.com/GoogleCloudPlatform/kubernetes/pkg/client"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
+	"github.com/coreos/go-etcd/etcd"
+)
+
+// TODO: Move this to a common place, it's needed in multiple tests.
+var apiPath = "/api/v1beta1"
+
+func makeUrl(suffix string) string {
+	return apiPath + suffix
+}
+
+type FakeTaskControl struct {
+	controllerSpec []ReplicationController
+	deleteTaskID   []string
+}
+
+func (f *FakeTaskControl) createReplica(spec ReplicationController) {
+	f.controllerSpec = append(f.controllerSpec, spec)
+}
+
+func (f *FakeTaskControl) deleteTask(taskID string) error {
+	f.deleteTaskID = append(f.deleteTaskID, taskID)
+	return nil
+}
+
+func makeReplicationController(replicas int) ReplicationController {
+	return ReplicationController{
+		DesiredState: ReplicationControllerState{
+			Replicas: replicas,
+			TaskTemplate: TaskTemplate{
+				DesiredState: TaskState{
+					Manifest: ContainerManifest{
+						Containers: []Container{
+							Container{
+								Image: "foo/bar",
+							},
+						},
+					},
+				},
+				Labels: map[string]string{
+					"name": "foo",
+					"type": "production",
+				},
+			},
+		},
+	}
+}
+
+func makeTaskList(count int) TaskList {
+	tasks := []Task{}
+	for i := 0; i < count; i++ {
+		tasks = append(tasks, Task{
+			JSONBase: JSONBase{
+				ID: fmt.Sprintf("task%d", i),
+			},
+		})
+	}
+	return TaskList{
+		Items: tasks,
+	}
+}
+
+func validateSyncReplication(t *testing.T, fakeTaskControl *FakeTaskControl, expectedCreates, expectedDeletes int) {
+	if len(fakeTaskControl.controllerSpec) != expectedCreates {
+		t.Errorf("Unexpected number of creates.  Expected %d, saw %d\n", expectedCreates, len(fakeTaskControl.controllerSpec))
+	}
+	if len(fakeTaskControl.deleteTaskID) != expectedDeletes {
+		t.Errorf("Unexpected number of deletes.  Expected %d, saw %d\n", expectedDeletes, len(fakeTaskControl.deleteTaskID))
+	}
+}
+
+func TestSyncReplicationControllerDoesNothing(t *testing.T) {
+	body, _ := json.Marshal(makeTaskList(2))
+	fakeHandler := util.FakeHandler{
+		StatusCode:   200,
+		ResponseBody: string(body),
+	}
+	testServer := httptest.NewTLSServer(&fakeHandler)
+	client := Client{
+		Host: testServer.URL,
+	}
+
+	fakeTaskControl := FakeTaskControl{}
+
+	manager := MakeReplicationManager(nil, &client)
+	manager.taskControl = &fakeTaskControl
+
+	controllerSpec := makeReplicationController(2)
+
+	manager.syncReplicationController(controllerSpec)
+	validateSyncReplication(t, &fakeTaskControl, 0, 0)
+}
+
+func TestSyncReplicationControllerDeletes(t *testing.T) {
+	body, _ := json.Marshal(makeTaskList(2))
+	fakeHandler := util.FakeHandler{
+		StatusCode:   200,
+		ResponseBody: string(body),
+	}
+	testServer := httptest.NewTLSServer(&fakeHandler)
+	client := Client{
+		Host: testServer.URL,
+	}
+
+	fakeTaskControl := FakeTaskControl{}
+
+	manager := MakeReplicationManager(nil, &client)
+	manager.taskControl = &fakeTaskControl
+
+	controllerSpec := makeReplicationController(1)
+
+	manager.syncReplicationController(controllerSpec)
+	validateSyncReplication(t, &fakeTaskControl, 0, 1)
+}
+
+func TestSyncReplicationControllerCreates(t *testing.T) {
+	body := "{ \"items\": [] }"
+	fakeHandler := util.FakeHandler{
+		StatusCode:   200,
+		ResponseBody: string(body),
+	}
+	testServer := httptest.NewTLSServer(&fakeHandler)
+	client := Client{
+		Host: testServer.URL,
+	}
+
+	fakeTaskControl := FakeTaskControl{}
+
+	manager := MakeReplicationManager(nil, &client)
+	manager.taskControl = &fakeTaskControl
+
+	controllerSpec := makeReplicationController(2)
+
+	manager.syncReplicationController(controllerSpec)
+	validateSyncReplication(t, &fakeTaskControl, 2, 0)
+}
+
+func TestCreateReplica(t *testing.T) {
+	body := "{}"
+	fakeHandler := util.FakeHandler{
+		StatusCode:   200,
+		ResponseBody: string(body),
+	}
+	testServer := httptest.NewTLSServer(&fakeHandler)
+	client := Client{
+		Host: testServer.URL,
+	}
+
+	taskControl := RealTaskControl{
+		kubeClient: client,
+	}
+
+	controllerSpec := ReplicationController{
+		DesiredState: ReplicationControllerState{
+			TaskTemplate: TaskTemplate{
+				DesiredState: TaskState{
+					Manifest: ContainerManifest{
+						Containers: []Container{
+							Container{
+								Image: "foo/bar",
+							},
+						},
+					},
+				},
+				Labels: map[string]string{
+					"name": "foo",
+					"type": "production",
+				},
+			},
+		},
+	}
+
+	taskControl.createReplica(controllerSpec)
+
+	//expectedTask := Task{
+	//	Labels:       controllerSpec.DesiredState.TaskTemplate.Labels,
+	//	DesiredState: controllerSpec.DesiredState.TaskTemplate.DesiredState,
+	//}
+	// TODO: fix this so that it validates the body.
+	fakeHandler.ValidateRequest(t, makeUrl("/tasks"), "POST", nil)
+}
+
+func TestHandleWatchResponseNotSet(t *testing.T) {
+	body, _ := json.Marshal(makeTaskList(2))
+	fakeHandler := util.FakeHandler{
+		StatusCode:   200,
+		ResponseBody: string(body),
+	}
+	testServer := httptest.NewTLSServer(&fakeHandler)
+	client := Client{
+		Host: testServer.URL,
+	}
+
+	fakeTaskControl := FakeTaskControl{}
+
+	manager := MakeReplicationManager(nil, &client)
+	manager.taskControl = &fakeTaskControl
+	_, err := manager.handleWatchResponse(&etcd.Response{
+		Action: "delete",
+	})
+	expectNoError(t, err)
+}
+
+func TestHandleWatchResponseNoNode(t *testing.T) {
+	body, _ := json.Marshal(makeTaskList(2))
+	fakeHandler := util.FakeHandler{
+		StatusCode:   200,
+		ResponseBody: string(body),
+	}
+	testServer := httptest.NewTLSServer(&fakeHandler)
+	client := Client{
+		Host: testServer.URL,
+	}
+
+	fakeTaskControl := FakeTaskControl{}
+
+	manager := MakeReplicationManager(nil, &client)
+	manager.taskControl = &fakeTaskControl
+	_, err := manager.handleWatchResponse(&etcd.Response{
+		Action: "set",
+	})
+	if err == nil {
+		t.Error("Unexpected non-error")
+	}
+}
+
+func TestHandleWatchResponseBadData(t *testing.T) {
+	body, _ := json.Marshal(makeTaskList(2))
+	fakeHandler := util.FakeHandler{
+		StatusCode:   200,
+		ResponseBody: string(body),
+	}
+	testServer := httptest.NewTLSServer(&fakeHandler)
+	client := Client{
+		Host: testServer.URL,
+	}
+
+	fakeTaskControl := FakeTaskControl{}
+
+	manager := MakeReplicationManager(nil, &client)
+	manager.taskControl = &fakeTaskControl
+	_, err := manager.handleWatchResponse(&etcd.Response{
+		Action: "set",
+		Node: &etcd.Node{
+			Value: "foobar",
+		},
+	})
+	if err == nil {
+		t.Error("Unexpected non-error")
+	}
+}
+
+func TestHandleWatchResponse(t *testing.T) {
+	body, _ := json.Marshal(makeTaskList(2))
+	fakeHandler := util.FakeHandler{
+		StatusCode:   200,
+		ResponseBody: string(body),
+	}
+	testServer := httptest.NewTLSServer(&fakeHandler)
+	client := Client{
+		Host: testServer.URL,
+	}
+
+	fakeTaskControl := FakeTaskControl{}
+
+	manager := MakeReplicationManager(nil, &client)
+	manager.taskControl = &fakeTaskControl
+
+	controller := makeReplicationController(2)
+
+	data, err := json.Marshal(controller)
+	expectNoError(t, err)
+	controllerOut, err := manager.handleWatchResponse(&etcd.Response{
+		Action: "set",
+		Node: &etcd.Node{
+			Value: string(data),
+		},
+	})
+	if err != nil {
+		t.Errorf("Unexpected error: %#v", err)
+	}
+	if !reflect.DeepEqual(controller, *controllerOut) {
+		t.Errorf("Unexpected mismatch.  Expected %#v, Saw: %#v", controller, controllerOut)
+	}
+}