helm/cmd/helm/installer/install_test.go

/*
Copyright 2016 The Kubernetes Authors 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 installer // import "k8s.io/helm/cmd/helm/installer"

import (
	"reflect"
	"testing"

	"github.com/ghodss/yaml"
	"k8s.io/kubernetes/pkg/api"
	"k8s.io/kubernetes/pkg/api/errors"
	"k8s.io/kubernetes/pkg/apis/extensions"
	"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
	testcore "k8s.io/kubernetes/pkg/client/testing/core"
	"k8s.io/kubernetes/pkg/runtime"

	"k8s.io/helm/pkg/version"
)

func TestDeploymentManifest(t *testing.T) {

	tests := []struct {
		name            string
		image           string
		canary          bool
		expect          string
		imagePullPolicy api.PullPolicy
	}{
		{"default", "", false, "gcr.io/kubernetes-helm/tiller:" + version.Version, "IfNotPresent"},
		{"canary", "example.com/tiller", true, "gcr.io/kubernetes-helm/tiller:canary", "Always"},
		{"custom", "example.com/tiller:latest", false, "example.com/tiller:latest", "IfNotPresent"},
	}

	for _, tt := range tests {
		o, err := DeploymentManifest(&Options{Namespace: api.NamespaceDefault, ImageSpec: tt.image, UseCanary: tt.canary})
		if err != nil {
			t.Fatalf("%s: error %q", tt.name, err)
		}
		var dep extensions.Deployment
		if err := yaml.Unmarshal([]byte(o), &dep); err != nil {
			t.Fatalf("%s: error %q", tt.name, err)
		}

		if got := dep.Spec.Template.Spec.Containers[0].Image; got != tt.expect {
			t.Errorf("%s: expected image %q, got %q", tt.name, tt.expect, got)
		}

		if got := dep.Spec.Template.Spec.Containers[0].ImagePullPolicy; got != tt.imagePullPolicy {
			t.Errorf("%s: expected imagePullPolicy %q, got %q", tt.name, tt.imagePullPolicy, got)
		}

		if got := dep.Spec.Template.Spec.Containers[0].Env[0].Value; got != api.NamespaceDefault {
			t.Errorf("%s: expected namespace %q, got %q", tt.name, api.NamespaceDefault, got)
		}
	}
}

func TestServiceManifest(t *testing.T) {
	o, err := ServiceManifest(api.NamespaceDefault)
	if err != nil {
		t.Fatalf("error %q", err)
	}
	var svc api.Service
	if err := yaml.Unmarshal([]byte(o), &svc); err != nil {
		t.Fatalf("error %q", err)
	}

	if got := svc.ObjectMeta.Namespace; got != api.NamespaceDefault {
		t.Errorf("expected namespace %s, got %s", api.NamespaceDefault, got)
	}
}

func TestInstall(t *testing.T) {
	image := "gcr.io/kubernetes-helm/tiller:v2.0.0"

	fc := &fake.Clientset{}
	fc.AddReactor("create", "deployments", func(action testcore.Action) (bool, runtime.Object, error) {
		obj := action.(testcore.CreateAction).GetObject().(*extensions.Deployment)
		l := obj.GetLabels()
		if reflect.DeepEqual(l, map[string]string{"app": "helm"}) {
			t.Errorf("expected labels = '', got '%s'", l)
		}
		i := obj.Spec.Template.Spec.Containers[0].Image
		if i != image {
			t.Errorf("expected image = '%s', got '%s'", image, i)
		}
		return true, obj, nil
	})
	fc.AddReactor("create", "services", func(action testcore.Action) (bool, runtime.Object, error) {
		obj := action.(testcore.CreateAction).GetObject().(*api.Service)
		l := obj.GetLabels()
		if reflect.DeepEqual(l, map[string]string{"app": "helm"}) {
			t.Errorf("expected labels = '', got '%s'", l)
		}
		n := obj.ObjectMeta.Namespace
		if n != api.NamespaceDefault {
			t.Errorf("expected namespace = '%s', got '%s'", api.NamespaceDefault, n)
		}
		return true, obj, nil
	})

	opts := &Options{Namespace: api.NamespaceDefault, ImageSpec: image}
	if err := Install(fc, opts); err != nil {
		t.Errorf("unexpected error: %#+v", err)
	}

	if actions := fc.Actions(); len(actions) != 2 {
		t.Errorf("unexpected actions: %v, expected 2 actions got %d", actions, len(actions))
	}
}

func TestInstall_canary(t *testing.T) {
	fc := &fake.Clientset{}
	fc.AddReactor("create", "deployments", func(action testcore.Action) (bool, runtime.Object, error) {
		obj := action.(testcore.CreateAction).GetObject().(*extensions.Deployment)
		i := obj.Spec.Template.Spec.Containers[0].Image
		if i != "gcr.io/kubernetes-helm/tiller:canary" {
			t.Errorf("expected canary image, got '%s'", i)
		}
		return true, obj, nil
	})
	fc.AddReactor("create", "services", func(action testcore.Action) (bool, runtime.Object, error) {
		obj := action.(testcore.CreateAction).GetObject().(*api.Service)
		return true, obj, nil
	})

	opts := &Options{Namespace: api.NamespaceDefault, UseCanary: true}
	if err := Install(fc, opts); err != nil {
		t.Errorf("unexpected error: %#+v", err)
	}

	if actions := fc.Actions(); len(actions) != 2 {
		t.Errorf("unexpected actions: %v, expected 2 actions got %d", actions, len(actions))
	}
}

func TestUpgrade(t *testing.T) {
	image := "gcr.io/kubernetes-helm/tiller:v2.0.0"

	existingDeployment := deployment(&Options{
		Namespace: api.NamespaceDefault,
		ImageSpec: "imageToReplace",
		UseCanary: false,
	})
	existingService := service(api.NamespaceDefault)

	fc := &fake.Clientset{}
	fc.AddReactor("get", "deployments", func(action testcore.Action) (bool, runtime.Object, error) {
		return true, existingDeployment, nil
	})
	fc.AddReactor("update", "deployments", func(action testcore.Action) (bool, runtime.Object, error) {
		obj := action.(testcore.UpdateAction).GetObject().(*extensions.Deployment)
		i := obj.Spec.Template.Spec.Containers[0].Image
		if i != image {
			t.Errorf("expected image = '%s', got '%s'", image, i)
		}
		return true, obj, nil
	})
	fc.AddReactor("get", "services", func(action testcore.Action) (bool, runtime.Object, error) {
		return true, existingService, nil
	})

	opts := &Options{Namespace: api.NamespaceDefault, ImageSpec: image}
	if err := Upgrade(fc, opts); err != nil {
		t.Errorf("unexpected error: %#+v", err)
	}

	if actions := fc.Actions(); len(actions) != 3 {
		t.Errorf("unexpected actions: %v, expected 3 actions got %d", actions, len(actions))
	}
}

func TestUpgrade_serviceNotFound(t *testing.T) {
	image := "gcr.io/kubernetes-helm/tiller:v2.0.0"

	existingDeployment := deployment(&Options{
		Namespace: api.NamespaceDefault,
		ImageSpec: "imageToReplace",
		UseCanary: false,
	})

	fc := &fake.Clientset{}
	fc.AddReactor("get", "deployments", func(action testcore.Action) (bool, runtime.Object, error) {
		return true, existingDeployment, nil
	})
	fc.AddReactor("update", "deployments", func(action testcore.Action) (bool, runtime.Object, error) {
		obj := action.(testcore.UpdateAction).GetObject().(*extensions.Deployment)
		i := obj.Spec.Template.Spec.Containers[0].Image
		if i != image {
			t.Errorf("expected image = '%s', got '%s'", image, i)
		}
		return true, obj, nil
	})
	fc.AddReactor("get", "services", func(action testcore.Action) (bool, runtime.Object, error) {
		return true, nil, errors.NewNotFound(api.Resource("services"), "1")
	})
	fc.AddReactor("create", "services", func(action testcore.Action) (bool, runtime.Object, error) {
		obj := action.(testcore.CreateAction).GetObject().(*api.Service)
		n := obj.ObjectMeta.Namespace
		if n != api.NamespaceDefault {
			t.Errorf("expected namespace = '%s', got '%s'", api.NamespaceDefault, n)
		}
		return true, obj, nil
	})

	opts := &Options{Namespace: api.NamespaceDefault, ImageSpec: image}
	if err := Upgrade(fc, opts); err != nil {
		t.Errorf("unexpected error: %#+v", err)
	}

	if actions := fc.Actions(); len(actions) != 4 {
		t.Errorf("unexpected actions: %v, expected 4 actions got %d", actions, len(actions))
	}
}