sigs.k8s.io/cluster-api@v1.7.1/util/resource/resource_test.go (about)

     1  /*
     2  Copyright 2020 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 resource
    18  
    19  import (
    20  	"math/rand"
    21  	"testing"
    22  
    23  	. "github.com/onsi/gomega"
    24  	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
    25  )
    26  
    27  var (
    28  	kindsWithPriority = []string{
    29  		"Namespace", "CustomResourceDefinition", "StorageClass", "PersistentVolume",
    30  		"PersistentVolumeClaim", "Secret", "ConfigMap", "ServiceAccount", "LimitRange",
    31  		"Pod", "ReplicaSet", "Endpoint",
    32  	}
    33  	kindsOther = []string{
    34  		"Deployment", "Service", "DaemonSet", "StatefulSet", "Job", "CronJob", "Ingress",
    35  		"NetworkPolicy", "Role", "RoleBinding",
    36  	}
    37  )
    38  
    39  func TestSortForCreate(t *testing.T) {
    40  	g := NewWithT(t)
    41  
    42  	cm := unstructured.Unstructured{}
    43  	cm.SetKind("ConfigMap")
    44  
    45  	ns := unstructured.Unstructured{}
    46  	ns.SetKind("Namespace")
    47  
    48  	ep := unstructured.Unstructured{}
    49  	ep.SetKind("Endpoint")
    50  
    51  	dp := unstructured.Unstructured{}
    52  	dp.SetKind("Deployment")
    53  
    54  	ds := unstructured.Unstructured{}
    55  	ds.SetKind("DaemonSet")
    56  
    57  	resources := []unstructured.Unstructured{ds, dp, ep, cm, ns}
    58  	sorted := SortForCreate(resources)
    59  	g.Expect(sorted).To(HaveLen(5))
    60  	g.Expect(sorted[0].GetKind()).To(BeIdenticalTo("Namespace"))
    61  	g.Expect(sorted[1].GetKind()).To(BeIdenticalTo("ConfigMap"))
    62  	g.Expect(sorted[2].GetKind()).To(BeIdenticalTo("Endpoint"))
    63  	// we have no way to determine the order of the last two elements
    64  	g.Expect(sorted[3].GetKind()).To(BeElementOf([]string{"DaemonSet", "Deployment"}))
    65  	g.Expect(sorted[4].GetKind()).To(BeElementOf([]string{"DaemonSet", "Deployment"}))
    66  }
    67  
    68  func TestSortForCreateAllShuffle(t *testing.T) {
    69  	g := NewWithT(t)
    70  
    71  	resources := make([]unstructured.Unstructured, 0, len(kindsWithPriority)+len(kindsOther))
    72  	for _, kind := range append(kindsWithPriority, kindsOther...) {
    73  		resource := unstructured.Unstructured{}
    74  		resource.SetKind(kind)
    75  		resources = append(resources, resource)
    76  	}
    77  	for j := 0; j < 100; j++ {
    78  		// determinically shuffle resources
    79  		rnd := rand.New(rand.NewSource(int64(j))) //nolint:gosec
    80  		rnd.Shuffle(len(resources), func(i, j int) {
    81  			resources[i], resources[j] = resources[j], resources[i]
    82  		})
    83  
    84  		sorted := SortForCreate(resources)
    85  		g.Expect(sorted).To(HaveLen(len(kindsWithPriority) + len(kindsOther)))
    86  		// first check that the first len(kindsWithPriority) elements are from
    87  		// the list of kinds with priority (and in order)
    88  		for i, res := range sorted[:len(kindsWithPriority)] {
    89  			g.Expect(res.GetKind()).To(BeIdenticalTo(kindsWithPriority[i]))
    90  		}
    91  		// while the rest of resources can be any of the other kinds
    92  		for _, res := range sorted[len(kindsWithPriority):] {
    93  			g.Expect(kindsOther).To(ContainElement(res.GetKind()))
    94  		}
    95  	}
    96  }