Add WIP okratest

Author: mumoshu

Diff for: pkg/okratest/exampleapp.go

@@ -0,0 +1,90 @@
+package okratest
+
+import (
+	"context"
+	"io"
+
+	"github.com/mumoshu/okra/pkg/clclient"
+	"github.com/mumoshu/okra/pkg/okraerror"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/kubernetes"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+)
+
+type ExampleApp struct {
+	// Image is the "repo:tag" of the contaimer image
+	Image string
+
+	ClientSet kubernetes.Interface
+	Client    client.Client
+
+	ClusterName, Namespace, ServiceName string
+}
+
+func NewExampleApp(ctx context.Context, clusterName, ns, serviceName string) (*ExampleApp, error) {
+	clientset, err := clclient.NewClientSet()
+	if err != nil {
+		return nil, okraerror.New(err)
+	}
+
+	secret, err := clientset.CoreV1().Secrets(ns).Get(ctx, clusterName, metav1.GetOptions{})
+	if err != nil {
+		return nil, okraerror.New(err)
+	}
+
+	// for k, v := range secret.Data {
+	// 	fmt.Fprintf(os.Stderr, "%s=%s\n", k, v)
+	// }
+
+	client, err := clclient.NewFromClusterSecret(*secret)
+	if err != nil {
+		return nil, err
+	}
+
+	image := "mumoshu/okra-exampleapp:latest"
+
+	return &ExampleApp{
+		Image:       image,
+		ClientSet:   clientset,
+		Client:      client,
+		ClusterName: clusterName,
+		Namespace:   ns,
+		ServiceName: serviceName,
+	}, nil
+}
+
+func (a *ExampleApp) Start(ctx context.Context) error {
+	for _, o := range a.ResourceObjects() {
+		if err := a.Client.Create(ctx, o, client.FieldOwner("okratest")); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (a *ExampleApp) ResourceObjects() []runtime.Object {
+	return nil
+}
+
+func (a *ExampleApp) WriteManifests(out io.Writer) error {
+	return nil
+}
+
+func (a *ExampleApp) Get(path string) error {
+	return nil
+}
+
+func (a *ExampleApp) Wait() error {
+	return nil
+}
+
+func (a *ExampleApp) Stop(ctx context.Context) error {
+	for _, o := range a.ResourceObjects() {
+		if err := a.Client.Delete(ctx, o); err != nil {
+			return err
+		}
+	}
+	return nil
+}