rollback_test.go

Documentation: k8s.io/kubectl/pkg/polymorphichelpers

     1  /*
     2  Copyright 2017 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package polymorphichelpers
    18  
    19  import (
    20  	"reflect"
    21  	"testing"
    22  
    23  	appsv1 "k8s.io/api/apps/v1"
    24  	corev1 "k8s.io/api/core/v1"
    25  	apiequality "k8s.io/apimachinery/pkg/api/equality"
    26  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    27  	"k8s.io/apimachinery/pkg/runtime"
    28  	"k8s.io/apimachinery/pkg/runtime/schema"
    29  	"k8s.io/apimachinery/pkg/types"
    30  	"k8s.io/client-go/kubernetes/fake"
    31  )
    32  
    33  var rollbackTests = map[schema.GroupKind]reflect.Type{
    34  	{Group: "apps", Kind: "DaemonSet"}:   reflect.TypeOf(&DaemonSetRollbacker{}),
    35  	{Group: "apps", Kind: "StatefulSet"}: reflect.TypeOf(&StatefulSetRollbacker{}),
    36  	{Group: "apps", Kind: "Deployment"}:  reflect.TypeOf(&DeploymentRollbacker{}),
    37  }
    38  
    39  func TestRollbackerFor(t *testing.T) {
    40  	fakeClientset := &fake.Clientset{}
    41  
    42  	for kind, expectedType := range rollbackTests {
    43  		result, err := RollbackerFor(kind, fakeClientset)
    44  		if err != nil {
    45  			t.Fatalf("error getting Rollbacker for a %v: %v", kind.String(), err)
    46  		}
    47  
    48  		if reflect.TypeOf(result) != expectedType {
    49  			t.Fatalf("unexpected output type (%v was expected but got %v)", expectedType, reflect.TypeOf(result))
    50  		}
    51  	}
    52  }
    53  
    54  func TestGetDeploymentPatch(t *testing.T) {
    55  	patchType, patchBytes, err := getDeploymentPatch(&corev1.PodTemplateSpec{
    56  		Spec: corev1.PodSpec{
    57  			Containers: []corev1.Container{{Image: "foo"}}}}, map[string]string{"a": "true"})
    58  	if err != nil {
    59  		t.Error(err)
    60  	}
    61  	if patchType != types.JSONPatchType {
    62  		t.Errorf("expected strategic merge patch, got %v", patchType)
    63  	}
    64  	expectedPatch := `[` +
    65  		`{"op":"replace","path":"/spec/template","value":{"metadata":{"creationTimestamp":null},"spec":{"containers":[{"name":"","image":"foo","resources":{}}]}}},` +
    66  		`{"op":"replace","path":"/metadata/annotations","value":{"a":"true"}}` +
    67  		`]`
    68  	if string(patchBytes) != expectedPatch {
    69  		t.Errorf("expected:\n%s\ngot\n%s", expectedPatch, string(patchBytes))
    70  	}
    71  }
    72  
    73  func TestStatefulSetApplyRevision(t *testing.T) {
    74  	tests := []struct {
    75  		name     string
    76  		source   *appsv1.StatefulSet
    77  		expected *appsv1.StatefulSet
    78  	}{
    79  		{
    80  			"test_less",
    81  			&appsv1.StatefulSet{
    82  				Spec: appsv1.StatefulSetSpec{
    83  					Template: corev1.PodTemplateSpec{
    84  						ObjectMeta: metav1.ObjectMeta{
    85  							Annotations: map[string]string{"version": "v3"},
    86  						},
    87  						Spec: corev1.PodSpec{
    88  							InitContainers: []corev1.Container{{Name: "i0"}},
    89  							Containers:     []corev1.Container{{Name: "c0"}},
    90  							Volumes:        []corev1.Volume{{Name: "v0"}},
    91  							NodeSelector:   map[string]string{"1dsa": "n0"},
    92  						},
    93  					},
    94  				},
    95  			},
    96  			&appsv1.StatefulSet{
    97  				Spec: appsv1.StatefulSetSpec{
    98  					Template: corev1.PodTemplateSpec{
    99  						Spec: corev1.PodSpec{
   100  							Containers: []corev1.Container{{Name: "c1"}},
   101  							// keep diversity field, eg: nil or empty slice
   102  							InitContainers: []corev1.Container{},
   103  						},
   104  					},
   105  				},
   106  			},
   107  		},
   108  		{
   109  			"test_more",
   110  			&appsv1.StatefulSet{
   111  				Spec: appsv1.StatefulSetSpec{
   112  					Template: corev1.PodTemplateSpec{
   113  						Spec: corev1.PodSpec{
   114  							InitContainers: []corev1.Container{{Name: "i0"}},
   115  						},
   116  					},
   117  				},
   118  			},
   119  			&appsv1.StatefulSet{
   120  				Spec: appsv1.StatefulSetSpec{
   121  					Template: corev1.PodTemplateSpec{
   122  						ObjectMeta: metav1.ObjectMeta{
   123  							Annotations: map[string]string{"version": "v3"},
   124  						},
   125  						Spec: corev1.PodSpec{
   126  							InitContainers: []corev1.Container{{Name: "i1"}},
   127  							Containers:     []corev1.Container{{Name: "c1"}},
   128  							Volumes:        []corev1.Volume{{Name: "v1"}},
   129  						},
   130  					},
   131  				},
   132  			},
   133  		},
   134  		{
   135  			"test_equal",
   136  			&appsv1.StatefulSet{
   137  				Spec: appsv1.StatefulSetSpec{
   138  					Template: corev1.PodTemplateSpec{
   139  						ObjectMeta: metav1.ObjectMeta{
   140  							Annotations: map[string]string{"version": "v3"},
   141  						},
   142  						Spec: corev1.PodSpec{
   143  							Containers:     []corev1.Container{{Name: "c1"}},
   144  							InitContainers: []corev1.Container{{Name: "i0"}},
   145  							Volumes:        []corev1.Volume{{Name: "v0"}},
   146  						},
   147  					},
   148  				},
   149  			},
   150  			&appsv1.StatefulSet{
   151  				Spec: appsv1.StatefulSetSpec{
   152  					Template: corev1.PodTemplateSpec{
   153  						ObjectMeta: metav1.ObjectMeta{
   154  							Annotations: map[string]string{"version": "v2"},
   155  						},
   156  						Spec: corev1.PodSpec{
   157  							InitContainers: []corev1.Container{{Name: "i1"}},
   158  							Containers:     []corev1.Container{{Name: "c1"}},
   159  							Volumes:        []corev1.Volume{{Name: "v1"}},
   160  						},
   161  					},
   162  				},
   163  			},
   164  		},
   165  	}
   166  
   167  	for _, tt := range tests {
   168  		t.Run(tt.name, func(t *testing.T) {
   169  			patch, err := getStatefulSetPatch(tt.expected)
   170  			if err != nil {
   171  				t.Errorf("getStatefulSetPatch failed : %v", err)
   172  			}
   173  			cr := &appsv1.ControllerRevision{
   174  				Data: runtime.RawExtension{
   175  					Raw: patch,
   176  				},
   177  			}
   178  			tt.source, err = applyRevision(tt.source, cr)
   179  			if err != nil {
   180  				t.Errorf("apply revision failed : %v", err)
   181  			}
   182  			// applyRevision adds TypeMeta field to new the statefulset, so use spec to compare only.
   183  			if !apiequality.Semantic.DeepEqual(tt.source.Spec, tt.expected.Spec) {
   184  				t.Errorf("expected out [%v]  but get [%v]", tt.expected.Spec, tt.source.Spec)
   185  			}
   186  		})
   187  	}
   188  }
   189
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