Integration test skeleton (kubernetes-sigs#800)

Introduces an skeleton for integration tests
using the events generated by the test provider.
Signed-off-by: Pablo Chacin <[email protected]>

scripts/fetch_ext_bins.sh

@@ -31,7 +31,7 @@ k8s_version=1.11.0
 goarch=amd64
 goos="unknown"
 
-if [[ "$OSTYPE" == "linux-gnu" ]]; then
+if [[ "$OSTYPE" == "linux"* ]]; then
   goos="linux"
 elif [[ "$OSTYPE" == "darwin"* ]]; then
   goos="darwin"

test/integration/cluster/BUILD.bazel

@@ -0,0 +1,19 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_test")
+
+go_test(
+    name = "go_default_test",
+    srcs = ["cluster_test.go"],
+    deps = [
+        "//pkg/apis/cluster/v1alpha1:go_default_library",
+        "//pkg/client/clientset_generated/clientset:go_default_library",
+        "//pkg/client/clientset_generated/clientset/typed/cluster/v1alpha1:go_default_library",
+        "//vendor/github.com/onsi/ginkgo:go_default_library",
+        "//vendor/github.com/onsi/gomega:go_default_library",
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+        "//vendor/k8s.io/client-go/informers:go_default_library",
+        "//vendor/k8s.io/client-go/kubernetes:go_default_library",
+        "//vendor/k8s.io/client-go/tools/cache:go_default_library",
+        "//vendor/k8s.io/client-go/tools/clientcmd:go_default_library",
+    ],
+)

test/integration/cluster/cluster_test.go

@@ -0,0 +1,129 @@
+/*
+Copyright 2019 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 integration
+
+import (
+	"os"
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	informers "k8s.io/client-go/informers"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/cache"
+	"k8s.io/client-go/tools/clientcmd"
+	clusterv1alpha1 "sigs.k8s.io/cluster-api/pkg/apis/cluster/v1alpha1"
+	clientset "sigs.k8s.io/cluster-api/pkg/client/clientset_generated/clientset"
+	client "sigs.k8s.io/cluster-api/pkg/client/clientset_generated/clientset/typed/cluster/v1alpha1"
+)
+
+var clusterSpec = &clusterv1alpha1.ClusterSpec{
+	ClusterNetwork: clusterv1alpha1.ClusterNetworkingConfig{
+		ServiceDomain: "mydomain.com",
+		Services: clusterv1alpha1.NetworkRanges{
+			CIDRBlocks: []string{"10.96.0.0/12"},
+		},
+		Pods: clusterv1alpha1.NetworkRanges{
+			CIDRBlocks: []string{"192.168.0.0/16"},
+		},
+	},
+}
+
+// Timeout for waiting events in seconds
+const TIMEOUT = 60
+
+func TestCluster(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Cluster-Controller")
+}
+
+var _ = Describe("Cluster-Controller", func() {
+	var clusterapi client.ClusterInterface
+	var client *kubernetes.Clientset
+	var stopper chan struct{}
+	var informer cache.SharedIndexInformer
+	var testNamespace string
+
+	BeforeEach(func() {
+		// Load configuration
+		kubeconfig := os.Getenv("KUBECONFIG")
+		config, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
+		Expect(err).ShouldNot(HaveOccurred())
+
+		// Create kubernetes client
+		client, err = kubernetes.NewForConfig(config)
+		Expect(err).ShouldNot(HaveOccurred())
+
+		// Create namespace for test
+		ns := &corev1.Namespace{ObjectMeta: metav1.ObjectMeta{GenerateName: "clusterapi-test-"}}
+		ns, err = client.Core().Namespaces().Create(ns)
+		Expect(err).ShouldNot(HaveOccurred())
+		testNamespace = ns.ObjectMeta.Name
+
+		// Create  informer for events in the namespace
+		factory := informers.NewSharedInformerFactoryWithOptions(client, 0, informers.WithNamespace(testNamespace))
+		informer = factory.Core().V1().Events().Informer()
+		stopper = make(chan struct{})
+
+		// Create clusterapi client
+		cs, err := clientset.NewForConfig(config)
+		Expect(err).ShouldNot(HaveOccurred())
+		clusterapi = cs.ClusterV1alpha1().Clusters(testNamespace)
+	})
+
+	AfterEach(func() {
+		close(stopper)
+		client.Core().Namespaces().Delete(testNamespace, &metav1.DeleteOptions{})
+	})
+
+	Describe("Create Cluster", func() {
+		It("Should trigger an event", func(done Done) {
+			// Register handler for cluster events
+			events := make(chan *corev1.Event, 0)
+			informer.AddEventHandler(cache.ResourceEventHandlerFuncs{
+				AddFunc: func(obj interface{}) {
+					// Guard against miscofigured informer not listening to Events
+					Expect(obj).Should(BeAssignableToTypeOf(&corev1.Event{}))
+
+					e := obj.(*corev1.Event)
+					if e.InvolvedObject.Kind == "Cluster" {
+						events <- e
+					}
+				},
+			})
+			go informer.Run(stopper)
+			Expect(cache.WaitForCacheSync(stopper, informer.HasSynced)).To(BeTrue())
+
+			// Create Cluster
+			cluster := &clusterv1alpha1.Cluster{
+				ObjectMeta: metav1.ObjectMeta{
+					GenerateName: "cluster-",
+					Namespace:    testNamespace,
+				},
+				Spec: *clusterSpec.DeepCopy(),
+			}
+			_, err := clusterapi.Create(cluster)
+			Expect(err).ShouldNot(HaveOccurred())
+
+			Expect(<-events).ShouldNot(BeNil())
+
+			close(done)
+		}, TIMEOUT)
+	})
+})