e2e: Quick and simple test case.

Author: runkecheng

test/e2e/README.md

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+# How to run e2e test
+
+## Prerequisites
+
+Prepare a client connected to K8S.
+
+## Hands-on Lab
+
+### Step 1: Configure environment variables
+
+```
+export KUBECONFIG=$HOME/.kube/config
+```
+
+### Step 2: Run test
+
+```
+make e2e-local
+```
+Example output of simplecase:
+```
+$ make e2e-local
+=== RUN   TestE2E
+STEP: Creating framework with timeout: 1200
+Running Suite: MySQL Operator E2E Suite
+=======================================
+Random Seed: 1640785115 - Will randomize all specs
+Will run 1 of 1 specs
+
+Namespece test 
+  test list namespace
+  /home/runkecheng/goCode/src/radondb-mysql-kubernetes/test/e2e/simplecase/list_namespace.go:38
+[BeforeEach] Namespece test
+  /home/runkecheng/goCode/src/radondb-mysql-kubernetes/test/e2e/framework/framework.go:62
+STEP: creating a kubernetes client
+STEP: create a namespace api object (e2e-mc-1-cnkbs)
+[BeforeEach] Namespece test
+  /home/runkecheng/goCode/src/radondb-mysql-kubernetes/test/e2e/simplecase/list_namespace.go:34
+STEP: before each
+[It] test list namespace
+  /home/runkecheng/goCode/src/radondb-mysql-kubernetes/test/e2e/simplecase/list_namespace.go:38
+default
+kube-public
+kube-system
+kubesphere-controls-system
+kubesphere-devops-system
+kubesphere-devops-worker
+kubesphere-monitoring-federated
+kubesphere-monitoring-system
+kubesphere-system
+radondb-mysql
+radondb-mysql-kubernetes-system
+[AfterEach] Namespece test
+  /home/runkecheng/goCode/src/radondb-mysql-kubernetes/test/e2e/framework/framework.go:63
+STEP: Collecting logs
+STEP: Run cleanup actions
+STEP: Delete testing namespace
+•
+Ran 1 of 1 Specs in 0.743 seconds
+SUCCESS! -- 1 Passed | 0 Failed | 0 Pending | 0 Skipped
+```

test/e2e/simplecase/list_namespace.go

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+/*
+Copyright 2021 RadonDB.
+
+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 simplecase
+
+import (
+	"context"
+	"fmt"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	"github.com/radondb/radondb-mysql-kubernetes/test/e2e/framework"
+)
+
+// Simple and quick test case, used to verify that the E2E framework is available.
+var _ = Describe("Namespece test", func() {
+	f := framework.NewFramework("mc-1")
+
+	BeforeEach(func() {
+		By("before each")
+	})
+
+	It("test list namespace", func() {
+		namespaces, err := f.ClientSet.CoreV1().Namespaces().List(context.TODO(), metav1.ListOptions{})
+		Expect(err).Should(BeNil())
+		Expect(len(namespaces.Items)).ShouldNot(BeZero())
+		for _, ns := range namespaces.Items {
+			fmt.Fprintln(GinkgoWriter, ns.Name)
+		}
+	})
+})