vendor/k8s.io/kubernetes/pkg/kubectl/cmd/top/top_node_test.go - cloudstack-kubernetes-provider - Git at Google

 /*
 Copyright 2016 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 top

 import (
 	"bytes"
 	"fmt"
 	"io/ioutil"
 	"net/http"
 	"strings"
 	"testing"

 	"net/url"

 	"k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/cli-runtime/pkg/genericclioptions"
 	"k8s.io/client-go/rest/fake"
 	core "k8s.io/client-go/testing"
 	cmdtesting "k8s.io/kubernetes/pkg/kubectl/cmd/testing"
 	"k8s.io/kubernetes/pkg/kubectl/scheme"
 	metricsv1alpha1api "k8s.io/metrics/pkg/apis/metrics/v1alpha1"
 	metricsv1beta1api "k8s.io/metrics/pkg/apis/metrics/v1beta1"
 	metricsfake "k8s.io/metrics/pkg/client/clientset/versioned/fake"
 )

 const (
 	apiPrefix  = "api"
 	apiVersion = "v1"
 )

 func TestTopNodeAllMetrics(t *testing.T) {
 	cmdtesting.InitTestErrorHandler(t)
 	metrics, nodes := testNodeV1alpha1MetricsData()
 	expectedMetricsPath := fmt.Sprintf("%s/%s/nodes", baseMetricsAddress, metricsApiVersion)
 	expectedNodePath := fmt.Sprintf("/%s/%s/nodes", apiPrefix, apiVersion)

 	tf := cmdtesting.NewTestFactory().WithNamespace("test")
 	defer tf.Cleanup()

 	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
 	ns := scheme.Codecs

 	tf.Client = &fake.RESTClient{
 		NegotiatedSerializer: ns,
 		Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
 			switch p, m := req.URL.Path, req.Method; {
 			case p == "/api":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
 			case p == "/apis":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbody)))}, nil
 			case p == expectedMetricsPath && m == "GET":
 				body, err := marshallBody(metrics)
 				if err != nil {
 					t.Errorf("unexpected error: %v", err)
 				}
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: body}, nil
 			case p == expectedNodePath && m == "GET":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, nodes)}, nil
 			default:
 				t.Fatalf("unexpected request: %#v\nGot URL: %#v\nExpected path: %#v", req, req.URL, expectedMetricsPath)
 				return nil, nil
 			}
 		}),
 	}
 	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
 	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

 	cmd := NewCmdTopNode(tf, nil, streams)
 	cmd.Flags().Set("no-headers", "true")
 	cmd.Run(cmd, []string{})

 	// Check the presence of node names in the output.
 	result := buf.String()
 	for _, m := range metrics.Items {
 		if !strings.Contains(result, m.Name) {
 			t.Errorf("missing metrics for %s: \n%s", m.Name, result)
 		}
 	}
 	if strings.Contains(result, "MEMORY") {
 		t.Errorf("should not print headers with --no-headers option set:\n%s\n", result)
 	}
 }

 func TestTopNodeAllMetricsCustomDefaults(t *testing.T) {
 	customBaseHeapsterServiceAddress := "/api/v1/namespaces/custom-namespace/services/https:custom-heapster-service:/proxy"
 	customBaseMetricsAddress := customBaseHeapsterServiceAddress + "/apis/metrics"

 	cmdtesting.InitTestErrorHandler(t)
 	metrics, nodes := testNodeV1alpha1MetricsData()
 	expectedMetricsPath := fmt.Sprintf("%s/%s/nodes", customBaseMetricsAddress, metricsApiVersion)
 	expectedNodePath := fmt.Sprintf("/%s/%s/nodes", apiPrefix, apiVersion)

 	tf := cmdtesting.NewTestFactory().WithNamespace("test")
 	defer tf.Cleanup()

 	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
 	ns := scheme.Codecs

 	tf.Client = &fake.RESTClient{
 		NegotiatedSerializer: ns,
 		Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
 			switch p, m := req.URL.Path, req.Method; {
 			case p == "/api":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
 			case p == "/apis":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbody)))}, nil
 			case p == expectedMetricsPath && m == "GET":
 				body, err := marshallBody(metrics)
 				if err != nil {
 					t.Errorf("unexpected error: %v", err)
 				}
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: body}, nil
 			case p == expectedNodePath && m == "GET":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, nodes)}, nil
 			default:
 				t.Fatalf("unexpected request: %#v\nGot URL: %#v\nExpected path: %#v", req, req.URL, expectedMetricsPath)
 				return nil, nil
 			}
 		}),
 	}
 	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
 	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

 	opts := &TopNodeOptions{
 		HeapsterOptions: HeapsterTopOptions{
 			Namespace: "custom-namespace",
 			Scheme:    "https",
 			Service:   "custom-heapster-service",
 		},
 		IOStreams: streams,
 	}
 	cmd := NewCmdTopNode(tf, opts, streams)
 	cmd.Run(cmd, []string{})

 	// Check the presence of node names in the output.
 	result := buf.String()
 	for _, m := range metrics.Items {
 		if !strings.Contains(result, m.Name) {
 			t.Errorf("missing metrics for %s: \n%s", m.Name, result)
 		}
 	}
 }

 func TestTopNodeWithNameMetrics(t *testing.T) {
 	cmdtesting.InitTestErrorHandler(t)
 	metrics, nodes := testNodeV1alpha1MetricsData()
 	expectedMetrics := metrics.Items[0]
 	expectedNode := nodes.Items[0]
 	nonExpectedMetrics := metricsv1alpha1api.NodeMetricsList{
 		ListMeta: metrics.ListMeta,
 		Items:    metrics.Items[1:],
 	}
 	expectedPath := fmt.Sprintf("%s/%s/nodes/%s", baseMetricsAddress, metricsApiVersion, expectedMetrics.Name)
 	expectedNodePath := fmt.Sprintf("/%s/%s/nodes/%s", apiPrefix, apiVersion, expectedMetrics.Name)

 	tf := cmdtesting.NewTestFactory().WithNamespace("test")
 	defer tf.Cleanup()

 	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
 	ns := scheme.Codecs

 	tf.Client = &fake.RESTClient{
 		NegotiatedSerializer: ns,
 		Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
 			switch p, m := req.URL.Path, req.Method; {
 			case p == "/api":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
 			case p == "/apis":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbody)))}, nil
 			case p == expectedPath && m == "GET":
 				body, err := marshallBody(expectedMetrics)
 				if err != nil {
 					t.Errorf("unexpected error: %v", err)
 				}
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: body}, nil
 			case p == expectedNodePath && m == "GET":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, &expectedNode)}, nil
 			default:
 				t.Fatalf("unexpected request: %#v\nGot URL: %#v\nExpected path: %#v", req, req.URL, expectedPath)
 				return nil, nil
 			}
 		}),
 	}
 	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
 	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

 	cmd := NewCmdTopNode(tf, nil, streams)
 	cmd.Run(cmd, []string{expectedMetrics.Name})

 	// Check the presence of node names in the output.
 	result := buf.String()
 	if !strings.Contains(result, expectedMetrics.Name) {
 		t.Errorf("missing metrics for %s: \n%s", expectedMetrics.Name, result)
 	}
 	for _, m := range nonExpectedMetrics.Items {
 		if strings.Contains(result, m.Name) {
 			t.Errorf("unexpected metrics for %s: \n%s", m.Name, result)
 		}
 	}
 }

 func TestTopNodeWithLabelSelectorMetrics(t *testing.T) {
 	cmdtesting.InitTestErrorHandler(t)
 	metrics, nodes := testNodeV1alpha1MetricsData()
 	expectedMetrics := metricsv1alpha1api.NodeMetricsList{
 		ListMeta: metrics.ListMeta,
 		Items:    metrics.Items[0:1],
 	}
 	expectedNodes := v1.NodeList{
 		ListMeta: nodes.ListMeta,
 		Items:    nodes.Items[0:1],
 	}
 	nonExpectedMetrics := metricsv1alpha1api.NodeMetricsList{
 		ListMeta: metrics.ListMeta,
 		Items:    metrics.Items[1:],
 	}
 	label := "key=value"
 	expectedPath := fmt.Sprintf("%s/%s/nodes", baseMetricsAddress, metricsApiVersion)
 	expectedQuery := fmt.Sprintf("labelSelector=%s", url.QueryEscape(label))
 	expectedNodePath := fmt.Sprintf("/%s/%s/nodes", apiPrefix, apiVersion)

 	tf := cmdtesting.NewTestFactory().WithNamespace("test")
 	defer tf.Cleanup()

 	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
 	ns := scheme.Codecs

 	tf.Client = &fake.RESTClient{
 		NegotiatedSerializer: ns,
 		Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
 			switch p, m, q := req.URL.Path, req.Method, req.URL.RawQuery; {
 			case p == "/api":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
 			case p == "/apis":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbody)))}, nil
 			case p == expectedPath && m == "GET" && q == expectedQuery:
 				body, err := marshallBody(expectedMetrics)
 				if err != nil {
 					t.Errorf("unexpected error: %v", err)
 				}
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: body}, nil
 			case p == expectedNodePath && m == "GET":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, &expectedNodes)}, nil
 			default:
 				t.Fatalf("unexpected request: %#v\nGot URL: %#v\nExpected path: %#v", req, req.URL, expectedPath)
 				return nil, nil
 			}
 		}),
 	}
 	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
 	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

 	cmd := NewCmdTopNode(tf, nil, streams)
 	cmd.Flags().Set("selector", label)
 	cmd.Run(cmd, []string{})

 	// Check the presence of node names in the output.
 	result := buf.String()
 	for _, m := range expectedMetrics.Items {
 		if !strings.Contains(result, m.Name) {
 			t.Errorf("missing metrics for %s: \n%s", m.Name, result)
 		}
 	}
 	for _, m := range nonExpectedMetrics.Items {
 		if strings.Contains(result, m.Name) {
 			t.Errorf("unexpected metrics for %s: \n%s", m.Name, result)
 		}
 	}
 }

 func TestTopNodeAllMetricsFromMetricsServer(t *testing.T) {
 	cmdtesting.InitTestErrorHandler(t)
 	expectedMetrics, nodes := testNodeV1beta1MetricsData()
 	expectedNodePath := fmt.Sprintf("/%s/%s/nodes", apiPrefix, apiVersion)

 	tf := cmdtesting.NewTestFactory().WithNamespace("test")
 	defer tf.Cleanup()

 	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
 	ns := scheme.Codecs

 	tf.Client = &fake.RESTClient{
 		NegotiatedSerializer: ns,
 		Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
 			switch p, m := req.URL.Path, req.Method; {
 			case p == "/api":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
 			case p == "/apis":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbodyWithMetrics)))}, nil
 			case p == expectedNodePath && m == "GET":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, nodes)}, nil
 			default:
 				t.Fatalf("unexpected request: %#v\nGot URL: %#v\n", req, req.URL)
 				return nil, nil
 			}
 		}),
 	}
 	fakemetricsClientset := &metricsfake.Clientset{}
 	fakemetricsClientset.AddReactor("list", "nodes", func(action core.Action) (handled bool, ret runtime.Object, err error) {
 		return true, expectedMetrics, nil
 	})
 	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
 	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

 	cmd := NewCmdTopNode(tf, nil, streams)

 	// TODO in the long run, we want to test most of our commands like this. Wire the options struct with specific mocks
 	// TODO then check the particular Run functionality and harvest results from fake clients
 	cmdOptions := &TopNodeOptions{
 		IOStreams: streams,
 	}
 	if err := cmdOptions.Complete(tf, cmd, []string{}); err != nil {
 		t.Fatal(err)
 	}
 	cmdOptions.MetricsClient = fakemetricsClientset
 	if err := cmdOptions.Validate(); err != nil {
 		t.Fatal(err)
 	}
 	if err := cmdOptions.RunTopNode(); err != nil {
 		t.Fatal(err)
 	}

 	// Check the presence of node names in the output.
 	result := buf.String()
 	for _, m := range expectedMetrics.Items {
 		if !strings.Contains(result, m.Name) {
 			t.Errorf("missing metrics for %s: \n%s", m.Name, result)
 		}
 	}
 }

 func TestTopNodeWithNameMetricsFromMetricsServer(t *testing.T) {
 	cmdtesting.InitTestErrorHandler(t)
 	metrics, nodes := testNodeV1beta1MetricsData()
 	expectedMetrics := metrics.Items[0]
 	expectedNode := nodes.Items[0]
 	nonExpectedMetrics := metricsv1beta1api.NodeMetricsList{
 		ListMeta: metrics.ListMeta,
 		Items:    metrics.Items[1:],
 	}
 	expectedNodePath := fmt.Sprintf("/%s/%s/nodes/%s", apiPrefix, apiVersion, expectedMetrics.Name)

 	tf := cmdtesting.NewTestFactory().WithNamespace("test")
 	defer tf.Cleanup()

 	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
 	ns := scheme.Codecs

 	tf.Client = &fake.RESTClient{
 		NegotiatedSerializer: ns,
 		Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
 			switch p, m := req.URL.Path, req.Method; {
 			case p == "/api":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
 			case p == "/apis":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbodyWithMetrics)))}, nil
 			case p == expectedNodePath && m == "GET":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, &expectedNode)}, nil
 			default:
 				t.Fatalf("unexpected request: %#v\nGot URL: %#v\n", req, req.URL)
 				return nil, nil
 			}
 		}),
 	}
 	fakemetricsClientset := &metricsfake.Clientset{}
 	fakemetricsClientset.AddReactor("get", "nodes", func(action core.Action) (handled bool, ret runtime.Object, err error) {
 		return true, &expectedMetrics, nil
 	})
 	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
 	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

 	cmd := NewCmdTopNode(tf, nil, streams)

 	// TODO in the long run, we want to test most of our commands like this. Wire the options struct with specific mocks
 	// TODO then check the particular Run functionality and harvest results from fake clients
 	cmdOptions := &TopNodeOptions{
 		IOStreams: streams,
 	}
 	if err := cmdOptions.Complete(tf, cmd, []string{expectedMetrics.Name}); err != nil {
 		t.Fatal(err)
 	}
 	cmdOptions.MetricsClient = fakemetricsClientset
 	if err := cmdOptions.Validate(); err != nil {
 		t.Fatal(err)
 	}
 	if err := cmdOptions.RunTopNode(); err != nil {
 		t.Fatal(err)
 	}

 	// Check the presence of node names in the output.
 	result := buf.String()
 	if !strings.Contains(result, expectedMetrics.Name) {
 		t.Errorf("missing metrics for %s: \n%s", expectedMetrics.Name, result)
 	}
 	for _, m := range nonExpectedMetrics.Items {
 		if strings.Contains(result, m.Name) {
 			t.Errorf("unexpected metrics for %s: \n%s", m.Name, result)
 		}
 	}
 }

 func TestTopNodeWithLabelSelectorMetricsFromMetricsServer(t *testing.T) {
 	cmdtesting.InitTestErrorHandler(t)
 	metrics, nodes := testNodeV1beta1MetricsData()
 	expectedMetrics := &metricsv1beta1api.NodeMetricsList{
 		ListMeta: metrics.ListMeta,
 		Items:    metrics.Items[0:1],
 	}
 	expectedNodes := v1.NodeList{
 		ListMeta: nodes.ListMeta,
 		Items:    nodes.Items[0:1],
 	}
 	nonExpectedMetrics := &metricsv1beta1api.NodeMetricsList{
 		ListMeta: metrics.ListMeta,
 		Items:    metrics.Items[1:],
 	}
 	label := "key=value"
 	expectedNodePath := fmt.Sprintf("/%s/%s/nodes", apiPrefix, apiVersion)

 	tf := cmdtesting.NewTestFactory().WithNamespace("test")
 	defer tf.Cleanup()

 	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
 	ns := scheme.Codecs

 	tf.Client = &fake.RESTClient{
 		NegotiatedSerializer: ns,
 		Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
 			switch p, m, _ := req.URL.Path, req.Method, req.URL.RawQuery; {
 			case p == "/api":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
 			case p == "/apis":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbodyWithMetrics)))}, nil
 			case p == expectedNodePath && m == "GET":
 				return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, &expectedNodes)}, nil
 			default:
 				t.Fatalf("unexpected request: %#v\nGot URL: %#v\n", req, req.URL)
 				return nil, nil
 			}
 		}),
 	}

 	fakemetricsClientset := &metricsfake.Clientset{}
 	fakemetricsClientset.AddReactor("list", "nodes", func(action core.Action) (handled bool, ret runtime.Object, err error) {
 		return true, expectedMetrics, nil
 	})
 	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
 	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

 	cmd := NewCmdTopNode(tf, nil, streams)
 	cmd.Flags().Set("selector", label)

 	// TODO in the long run, we want to test most of our commands like this. Wire the options struct with specific mocks
 	// TODO then check the particular Run functionality and harvest results from fake clients
 	cmdOptions := &TopNodeOptions{
 		IOStreams: streams,
 	}
 	if err := cmdOptions.Complete(tf, cmd, []string{}); err != nil {
 		t.Fatal(err)
 	}
 	cmdOptions.MetricsClient = fakemetricsClientset
 	if err := cmdOptions.Validate(); err != nil {
 		t.Fatal(err)
 	}
 	if err := cmdOptions.RunTopNode(); err != nil {
 		t.Fatal(err)
 	}

 	// Check the presence of node names in the output.
 	result := buf.String()
 	for _, m := range expectedMetrics.Items {
 		if !strings.Contains(result, m.Name) {
 			t.Errorf("missing metrics for %s: \n%s", m.Name, result)
 		}
 	}
 	for _, m := range nonExpectedMetrics.Items {
 		if strings.Contains(result, m.Name) {
 			t.Errorf("unexpected metrics for %s: \n%s", m.Name, result)
 		}
 	}
 }
	/*
	Copyright 2016 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 top

	import (
	"bytes"
	"fmt"
	"io/ioutil"
	"net/http"
	"strings"
	"testing"

	"net/url"

	"k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/cli-runtime/pkg/genericclioptions"
	"k8s.io/client-go/rest/fake"
	core "k8s.io/client-go/testing"
	cmdtesting "k8s.io/kubernetes/pkg/kubectl/cmd/testing"
	"k8s.io/kubernetes/pkg/kubectl/scheme"
	metricsv1alpha1api "k8s.io/metrics/pkg/apis/metrics/v1alpha1"
	metricsv1beta1api "k8s.io/metrics/pkg/apis/metrics/v1beta1"
	metricsfake "k8s.io/metrics/pkg/client/clientset/versioned/fake"
	)

	const (
	apiPrefix = "api"
	apiVersion = "v1"
	)

	func TestTopNodeAllMetrics(t *testing.T) {
	cmdtesting.InitTestErrorHandler(t)
	metrics, nodes := testNodeV1alpha1MetricsData()
	expectedMetricsPath := fmt.Sprintf("%s/%s/nodes", baseMetricsAddress, metricsApiVersion)
	expectedNodePath := fmt.Sprintf("/%s/%s/nodes", apiPrefix, apiVersion)

	tf := cmdtesting.NewTestFactory().WithNamespace("test")
	defer tf.Cleanup()

	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
	ns := scheme.Codecs

	tf.Client = &fake.RESTClient{
	NegotiatedSerializer: ns,
	Client: fake.CreateHTTPClient(func(req http.Request) (http.Response, error) {
	switch p, m := req.URL.Path, req.Method; {
	case p == "/api":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
	case p == "/apis":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbody)))}, nil
	case p == expectedMetricsPath && m == "GET":
	body, err := marshallBody(metrics)
	if err != nil {
	t.Errorf("unexpected error: %v", err)
	}
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: body}, nil
	case p == expectedNodePath && m == "GET":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, nodes)}, nil
	default:
	t.Fatalf("unexpected request: %#v\nGot URL: %#v\nExpected path: %#v", req, req.URL, expectedMetricsPath)
	return nil, nil
	}
	}),
	}
	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

	cmd := NewCmdTopNode(tf, nil, streams)
	cmd.Flags().Set("no-headers", "true")
	cmd.Run(cmd, []string{})

	// Check the presence of node names in the output.
	result := buf.String()
	for _, m := range metrics.Items {
	if !strings.Contains(result, m.Name) {
	t.Errorf("missing metrics for %s: \n%s", m.Name, result)
	}
	}
	if strings.Contains(result, "MEMORY") {
	t.Errorf("should not print headers with --no-headers option set:\n%s\n", result)
	}
	}

	func TestTopNodeAllMetricsCustomDefaults(t *testing.T) {
	customBaseHeapsterServiceAddress := "/api/v1/namespaces/custom-namespace/services/https:custom-heapster-service:/proxy"
	customBaseMetricsAddress := customBaseHeapsterServiceAddress + "/apis/metrics"

	cmdtesting.InitTestErrorHandler(t)
	metrics, nodes := testNodeV1alpha1MetricsData()
	expectedMetricsPath := fmt.Sprintf("%s/%s/nodes", customBaseMetricsAddress, metricsApiVersion)
	expectedNodePath := fmt.Sprintf("/%s/%s/nodes", apiPrefix, apiVersion)

	tf := cmdtesting.NewTestFactory().WithNamespace("test")
	defer tf.Cleanup()

	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
	ns := scheme.Codecs

	tf.Client = &fake.RESTClient{
	NegotiatedSerializer: ns,
	Client: fake.CreateHTTPClient(func(req http.Request) (http.Response, error) {
	switch p, m := req.URL.Path, req.Method; {
	case p == "/api":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
	case p == "/apis":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbody)))}, nil
	case p == expectedMetricsPath && m == "GET":
	body, err := marshallBody(metrics)
	if err != nil {
	t.Errorf("unexpected error: %v", err)
	}
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: body}, nil
	case p == expectedNodePath && m == "GET":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, nodes)}, nil
	default:
	t.Fatalf("unexpected request: %#v\nGot URL: %#v\nExpected path: %#v", req, req.URL, expectedMetricsPath)
	return nil, nil
	}
	}),
	}
	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

	opts := &TopNodeOptions{
	HeapsterOptions: HeapsterTopOptions{
	Namespace: "custom-namespace",
	Scheme: "https",
	Service: "custom-heapster-service",
	},
	IOStreams: streams,
	}
	cmd := NewCmdTopNode(tf, opts, streams)
	cmd.Run(cmd, []string{})

	// Check the presence of node names in the output.
	result := buf.String()
	for _, m := range metrics.Items {
	if !strings.Contains(result, m.Name) {
	t.Errorf("missing metrics for %s: \n%s", m.Name, result)
	}
	}
	}

	func TestTopNodeWithNameMetrics(t *testing.T) {
	cmdtesting.InitTestErrorHandler(t)
	metrics, nodes := testNodeV1alpha1MetricsData()
	expectedMetrics := metrics.Items[0]
	expectedNode := nodes.Items[0]
	nonExpectedMetrics := metricsv1alpha1api.NodeMetricsList{
	ListMeta: metrics.ListMeta,
	Items: metrics.Items[1:],
	}
	expectedPath := fmt.Sprintf("%s/%s/nodes/%s", baseMetricsAddress, metricsApiVersion, expectedMetrics.Name)
	expectedNodePath := fmt.Sprintf("/%s/%s/nodes/%s", apiPrefix, apiVersion, expectedMetrics.Name)

	tf := cmdtesting.NewTestFactory().WithNamespace("test")
	defer tf.Cleanup()

	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
	ns := scheme.Codecs

	tf.Client = &fake.RESTClient{
	NegotiatedSerializer: ns,
	Client: fake.CreateHTTPClient(func(req http.Request) (http.Response, error) {
	switch p, m := req.URL.Path, req.Method; {
	case p == "/api":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
	case p == "/apis":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbody)))}, nil
	case p == expectedPath && m == "GET":
	body, err := marshallBody(expectedMetrics)
	if err != nil {
	t.Errorf("unexpected error: %v", err)
	}
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: body}, nil
	case p == expectedNodePath && m == "GET":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, &expectedNode)}, nil
	default:
	t.Fatalf("unexpected request: %#v\nGot URL: %#v\nExpected path: %#v", req, req.URL, expectedPath)
	return nil, nil
	}
	}),
	}
	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

	cmd := NewCmdTopNode(tf, nil, streams)
	cmd.Run(cmd, []string{expectedMetrics.Name})

	// Check the presence of node names in the output.
	result := buf.String()
	if !strings.Contains(result, expectedMetrics.Name) {
	t.Errorf("missing metrics for %s: \n%s", expectedMetrics.Name, result)
	}
	for _, m := range nonExpectedMetrics.Items {
	if strings.Contains(result, m.Name) {
	t.Errorf("unexpected metrics for %s: \n%s", m.Name, result)
	}
	}
	}

	func TestTopNodeWithLabelSelectorMetrics(t *testing.T) {
	cmdtesting.InitTestErrorHandler(t)
	metrics, nodes := testNodeV1alpha1MetricsData()
	expectedMetrics := metricsv1alpha1api.NodeMetricsList{
	ListMeta: metrics.ListMeta,
	Items: metrics.Items[0:1],
	}
	expectedNodes := v1.NodeList{
	ListMeta: nodes.ListMeta,
	Items: nodes.Items[0:1],
	}
	nonExpectedMetrics := metricsv1alpha1api.NodeMetricsList{
	ListMeta: metrics.ListMeta,
	Items: metrics.Items[1:],
	}
	label := "key=value"
	expectedPath := fmt.Sprintf("%s/%s/nodes", baseMetricsAddress, metricsApiVersion)
	expectedQuery := fmt.Sprintf("labelSelector=%s", url.QueryEscape(label))
	expectedNodePath := fmt.Sprintf("/%s/%s/nodes", apiPrefix, apiVersion)

	tf := cmdtesting.NewTestFactory().WithNamespace("test")
	defer tf.Cleanup()

	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
	ns := scheme.Codecs

	tf.Client = &fake.RESTClient{
	NegotiatedSerializer: ns,
	Client: fake.CreateHTTPClient(func(req http.Request) (http.Response, error) {
	switch p, m, q := req.URL.Path, req.Method, req.URL.RawQuery; {
	case p == "/api":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
	case p == "/apis":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbody)))}, nil
	case p == expectedPath && m == "GET" && q == expectedQuery:
	body, err := marshallBody(expectedMetrics)
	if err != nil {
	t.Errorf("unexpected error: %v", err)
	}
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: body}, nil
	case p == expectedNodePath && m == "GET":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, &expectedNodes)}, nil
	default:
	t.Fatalf("unexpected request: %#v\nGot URL: %#v\nExpected path: %#v", req, req.URL, expectedPath)
	return nil, nil
	}
	}),
	}
	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

	cmd := NewCmdTopNode(tf, nil, streams)
	cmd.Flags().Set("selector", label)
	cmd.Run(cmd, []string{})

	// Check the presence of node names in the output.
	result := buf.String()
	for _, m := range expectedMetrics.Items {
	if !strings.Contains(result, m.Name) {
	t.Errorf("missing metrics for %s: \n%s", m.Name, result)
	}
	}
	for _, m := range nonExpectedMetrics.Items {
	if strings.Contains(result, m.Name) {
	t.Errorf("unexpected metrics for %s: \n%s", m.Name, result)
	}
	}
	}

	func TestTopNodeAllMetricsFromMetricsServer(t *testing.T) {
	cmdtesting.InitTestErrorHandler(t)
	expectedMetrics, nodes := testNodeV1beta1MetricsData()
	expectedNodePath := fmt.Sprintf("/%s/%s/nodes", apiPrefix, apiVersion)

	tf := cmdtesting.NewTestFactory().WithNamespace("test")
	defer tf.Cleanup()

	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
	ns := scheme.Codecs

	tf.Client = &fake.RESTClient{
	NegotiatedSerializer: ns,
	Client: fake.CreateHTTPClient(func(req http.Request) (http.Response, error) {
	switch p, m := req.URL.Path, req.Method; {
	case p == "/api":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
	case p == "/apis":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbodyWithMetrics)))}, nil
	case p == expectedNodePath && m == "GET":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, nodes)}, nil
	default:
	t.Fatalf("unexpected request: %#v\nGot URL: %#v\n", req, req.URL)
	return nil, nil
	}
	}),
	}
	fakemetricsClientset := &metricsfake.Clientset{}
	fakemetricsClientset.AddReactor("list", "nodes", func(action core.Action) (handled bool, ret runtime.Object, err error) {
	return true, expectedMetrics, nil
	})
	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

	cmd := NewCmdTopNode(tf, nil, streams)

	// TODO in the long run, we want to test most of our commands like this. Wire the options struct with specific mocks
	// TODO then check the particular Run functionality and harvest results from fake clients
	cmdOptions := &TopNodeOptions{
	IOStreams: streams,
	}
	if err := cmdOptions.Complete(tf, cmd, []string{}); err != nil {
	t.Fatal(err)
	}
	cmdOptions.MetricsClient = fakemetricsClientset
	if err := cmdOptions.Validate(); err != nil {
	t.Fatal(err)
	}
	if err := cmdOptions.RunTopNode(); err != nil {
	t.Fatal(err)
	}

	// Check the presence of node names in the output.
	result := buf.String()
	for _, m := range expectedMetrics.Items {
	if !strings.Contains(result, m.Name) {
	t.Errorf("missing metrics for %s: \n%s", m.Name, result)
	}
	}
	}

	func TestTopNodeWithNameMetricsFromMetricsServer(t *testing.T) {
	cmdtesting.InitTestErrorHandler(t)
	metrics, nodes := testNodeV1beta1MetricsData()
	expectedMetrics := metrics.Items[0]
	expectedNode := nodes.Items[0]
	nonExpectedMetrics := metricsv1beta1api.NodeMetricsList{
	ListMeta: metrics.ListMeta,
	Items: metrics.Items[1:],
	}
	expectedNodePath := fmt.Sprintf("/%s/%s/nodes/%s", apiPrefix, apiVersion, expectedMetrics.Name)

	tf := cmdtesting.NewTestFactory().WithNamespace("test")
	defer tf.Cleanup()

	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
	ns := scheme.Codecs

	tf.Client = &fake.RESTClient{
	NegotiatedSerializer: ns,
	Client: fake.CreateHTTPClient(func(req http.Request) (http.Response, error) {
	switch p, m := req.URL.Path, req.Method; {
	case p == "/api":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
	case p == "/apis":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbodyWithMetrics)))}, nil
	case p == expectedNodePath && m == "GET":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, &expectedNode)}, nil
	default:
	t.Fatalf("unexpected request: %#v\nGot URL: %#v\n", req, req.URL)
	return nil, nil
	}
	}),
	}
	fakemetricsClientset := &metricsfake.Clientset{}
	fakemetricsClientset.AddReactor("get", "nodes", func(action core.Action) (handled bool, ret runtime.Object, err error) {
	return true, &expectedMetrics, nil
	})
	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

	cmd := NewCmdTopNode(tf, nil, streams)

	// TODO in the long run, we want to test most of our commands like this. Wire the options struct with specific mocks
	// TODO then check the particular Run functionality and harvest results from fake clients
	cmdOptions := &TopNodeOptions{
	IOStreams: streams,
	}
	if err := cmdOptions.Complete(tf, cmd, []string{expectedMetrics.Name}); err != nil {
	t.Fatal(err)
	}
	cmdOptions.MetricsClient = fakemetricsClientset
	if err := cmdOptions.Validate(); err != nil {
	t.Fatal(err)
	}
	if err := cmdOptions.RunTopNode(); err != nil {
	t.Fatal(err)
	}

	// Check the presence of node names in the output.
	result := buf.String()
	if !strings.Contains(result, expectedMetrics.Name) {
	t.Errorf("missing metrics for %s: \n%s", expectedMetrics.Name, result)
	}
	for _, m := range nonExpectedMetrics.Items {
	if strings.Contains(result, m.Name) {
	t.Errorf("unexpected metrics for %s: \n%s", m.Name, result)
	}
	}
	}

	func TestTopNodeWithLabelSelectorMetricsFromMetricsServer(t *testing.T) {
	cmdtesting.InitTestErrorHandler(t)
	metrics, nodes := testNodeV1beta1MetricsData()
	expectedMetrics := &metricsv1beta1api.NodeMetricsList{
	ListMeta: metrics.ListMeta,
	Items: metrics.Items[0:1],
	}
	expectedNodes := v1.NodeList{
	ListMeta: nodes.ListMeta,
	Items: nodes.Items[0:1],
	}
	nonExpectedMetrics := &metricsv1beta1api.NodeMetricsList{
	ListMeta: metrics.ListMeta,
	Items: metrics.Items[1:],
	}
	label := "key=value"
	expectedNodePath := fmt.Sprintf("/%s/%s/nodes", apiPrefix, apiVersion)

	tf := cmdtesting.NewTestFactory().WithNamespace("test")
	defer tf.Cleanup()

	codec := scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
	ns := scheme.Codecs

	tf.Client = &fake.RESTClient{
	NegotiatedSerializer: ns,
	Client: fake.CreateHTTPClient(func(req http.Request) (http.Response, error) {
	switch p, m, _ := req.URL.Path, req.Method, req.URL.RawQuery; {
	case p == "/api":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
	case p == "/apis":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbodyWithMetrics)))}, nil
	case p == expectedNodePath && m == "GET":
	return &http.Response{StatusCode: 200, Header: cmdtesting.DefaultHeader(), Body: cmdtesting.ObjBody(codec, &expectedNodes)}, nil
	default:
	t.Fatalf("unexpected request: %#v\nGot URL: %#v\n", req, req.URL)
	return nil, nil
	}
	}),
	}

	fakemetricsClientset := &metricsfake.Clientset{}
	fakemetricsClientset.AddReactor("list", "nodes", func(action core.Action) (handled bool, ret runtime.Object, err error) {
	return true, expectedMetrics, nil
	})
	tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
	streams, _, buf, _ := genericclioptions.NewTestIOStreams()

	cmd := NewCmdTopNode(tf, nil, streams)
	cmd.Flags().Set("selector", label)

	// TODO in the long run, we want to test most of our commands like this. Wire the options struct with specific mocks
	// TODO then check the particular Run functionality and harvest results from fake clients
	cmdOptions := &TopNodeOptions{
	IOStreams: streams,
	}
	if err := cmdOptions.Complete(tf, cmd, []string{}); err != nil {
	t.Fatal(err)
	}
	cmdOptions.MetricsClient = fakemetricsClientset
	if err := cmdOptions.Validate(); err != nil {
	t.Fatal(err)
	}
	if err := cmdOptions.RunTopNode(); err != nil {
	t.Fatal(err)
	}

	// Check the presence of node names in the output.
	result := buf.String()
	for _, m := range expectedMetrics.Items {
	if !strings.Contains(result, m.Name) {
	t.Errorf("missing metrics for %s: \n%s", m.Name, result)
	}
	}
	for _, m := range nonExpectedMetrics.Items {
	if strings.Contains(result, m.Name) {
	t.Errorf("unexpected metrics for %s: \n%s", m.Name, result)
	}
	}
	}