Merge pull request #5646 from anujagrawal699/addedTests-pkg/scheduler/core/common.go
Added tests pkg/scheduler/core/common.go
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d295576a5e
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/*
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Copyright 2024 The Karmada Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package core
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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clusterv1alpha1 "github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
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policyv1alpha1 "github.com/karmada-io/karmada/pkg/apis/policy/v1alpha1"
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workv1alpha2 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha2"
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"github.com/karmada-io/karmada/pkg/scheduler/framework"
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)
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func TestSelectClusters(t *testing.T) {
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tests := []struct {
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name string
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clustersScore framework.ClusterScoreList
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placement *policyv1alpha1.Placement
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spec *workv1alpha2.ResourceBindingSpec
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expectedResult []*clusterv1alpha1.Cluster
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expectedError bool
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}{
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{
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name: "select all clusters",
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clustersScore: framework.ClusterScoreList{
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{Cluster: &clusterv1alpha1.Cluster{ObjectMeta: metav1.ObjectMeta{Name: "cluster1"}}, Score: 10},
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{Cluster: &clusterv1alpha1.Cluster{ObjectMeta: metav1.ObjectMeta{Name: "cluster2"}}, Score: 20},
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},
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placement: &policyv1alpha1.Placement{},
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spec: &workv1alpha2.ResourceBindingSpec{},
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expectedResult: []*clusterv1alpha1.Cluster{
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{ObjectMeta: metav1.ObjectMeta{Name: "cluster1"}},
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{ObjectMeta: metav1.ObjectMeta{Name: "cluster2"}},
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},
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expectedError: false,
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},
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{
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name: "select top 1 cluster",
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clustersScore: framework.ClusterScoreList{
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{Cluster: &clusterv1alpha1.Cluster{ObjectMeta: metav1.ObjectMeta{Name: "cluster1"}}, Score: 10},
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{Cluster: &clusterv1alpha1.Cluster{ObjectMeta: metav1.ObjectMeta{Name: "cluster2"}}, Score: 20},
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{Cluster: &clusterv1alpha1.Cluster{ObjectMeta: metav1.ObjectMeta{Name: "cluster3"}}, Score: 15},
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},
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placement: &policyv1alpha1.Placement{
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ClusterAffinity: &policyv1alpha1.ClusterAffinity{
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ClusterNames: []string{"cluster1", "cluster2", "cluster3"},
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},
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SpreadConstraints: []policyv1alpha1.SpreadConstraint{
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{
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SpreadByField: policyv1alpha1.SpreadByFieldCluster,
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MaxGroups: 1,
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},
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},
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},
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spec: &workv1alpha2.ResourceBindingSpec{},
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expectedResult: []*clusterv1alpha1.Cluster{
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{ObjectMeta: metav1.ObjectMeta{Name: "cluster2"}},
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},
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expectedError: false,
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},
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{
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name: "select clusters with affinity",
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clustersScore: framework.ClusterScoreList{
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{Cluster: &clusterv1alpha1.Cluster{ObjectMeta: metav1.ObjectMeta{Name: "cluster1"}}, Score: 10},
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{Cluster: &clusterv1alpha1.Cluster{ObjectMeta: metav1.ObjectMeta{Name: "cluster3"}}, Score: 15},
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},
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placement: &policyv1alpha1.Placement{
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ClusterAffinity: &policyv1alpha1.ClusterAffinity{
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ClusterNames: []string{"cluster1", "cluster3"},
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},
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},
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spec: &workv1alpha2.ResourceBindingSpec{},
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expectedResult: []*clusterv1alpha1.Cluster{
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{ObjectMeta: metav1.ObjectMeta{Name: "cluster1"}},
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{ObjectMeta: metav1.ObjectMeta{Name: "cluster3"}},
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},
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expectedError: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result, err := SelectClusters(tt.clustersScore, tt.placement, tt.spec)
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if tt.expectedError {
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assert.Error(t, err)
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} else {
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assert.NoError(t, err)
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assert.Equal(t, len(tt.expectedResult), len(result))
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expectedNames := make([]string, len(tt.expectedResult))
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for i, cluster := range tt.expectedResult {
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expectedNames[i] = cluster.Name
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}
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actualNames := make([]string, len(result))
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for i, cluster := range result {
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actualNames[i] = cluster.Name
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}
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assert.ElementsMatch(t, expectedNames, actualNames)
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}
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})
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}
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}
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func TestAssignReplicas(t *testing.T) {
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tests := []struct {
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name string
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clusters []*clusterv1alpha1.Cluster
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spec *workv1alpha2.ResourceBindingSpec
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status *workv1alpha2.ResourceBindingStatus
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expectedResult []workv1alpha2.TargetCluster
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expectedError bool
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expectedErrMsg string
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}{
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{
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name: "Assign replicas to single cluster",
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clusters: []*clusterv1alpha1.Cluster{
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{ObjectMeta: metav1.ObjectMeta{Name: "cluster1"}},
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},
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spec: &workv1alpha2.ResourceBindingSpec{
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Replicas: 3,
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Placement: &policyv1alpha1.Placement{
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ReplicaScheduling: &policyv1alpha1.ReplicaSchedulingStrategy{
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ReplicaSchedulingType: policyv1alpha1.ReplicaSchedulingTypeDivided,
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ReplicaDivisionPreference: policyv1alpha1.ReplicaDivisionPreferenceWeighted,
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},
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},
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},
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status: &workv1alpha2.ResourceBindingStatus{},
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expectedResult: []workv1alpha2.TargetCluster{{Name: "cluster1", Replicas: 3}},
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expectedError: false,
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},
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{
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name: "No clusters available",
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clusters: []*clusterv1alpha1.Cluster{},
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spec: &workv1alpha2.ResourceBindingSpec{Replicas: 1},
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status: &workv1alpha2.ResourceBindingStatus{},
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expectedResult: nil,
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expectedError: true,
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expectedErrMsg: "no clusters available to schedule",
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},
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{
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name: "Non-workload scenario (zero replicas)",
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clusters: []*clusterv1alpha1.Cluster{
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{ObjectMeta: metav1.ObjectMeta{Name: "cluster1"}},
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{ObjectMeta: metav1.ObjectMeta{Name: "cluster2"}},
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},
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spec: &workv1alpha2.ResourceBindingSpec{
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Replicas: 0,
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},
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status: &workv1alpha2.ResourceBindingStatus{},
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expectedResult: []workv1alpha2.TargetCluster{{Name: "cluster1"}, {Name: "cluster2"}},
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expectedError: false,
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},
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{
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name: "Unsupported replica scheduling strategy",
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clusters: []*clusterv1alpha1.Cluster{
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{Spec: clusterv1alpha1.ClusterSpec{ID: "cluster1"}},
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},
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spec: &workv1alpha2.ResourceBindingSpec{
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Replicas: 3,
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Placement: &policyv1alpha1.Placement{
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ReplicaScheduling: &policyv1alpha1.ReplicaSchedulingStrategy{
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ReplicaSchedulingType: "UnsupportedType",
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ReplicaDivisionPreference: "UnsupportedPreference",
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},
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},
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},
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status: &workv1alpha2.ResourceBindingStatus{},
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expectedResult: nil,
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expectedError: true,
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expectedErrMsg: "unsupported replica scheduling strategy",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result, err := AssignReplicas(tt.clusters, tt.spec, tt.status)
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if tt.expectedError {
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assert.Error(t, err)
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if tt.expectedErrMsg != "" {
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assert.Contains(t, err.Error(), tt.expectedErrMsg)
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}
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} else {
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assert.NoError(t, err)
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assert.Equal(t, len(tt.expectedResult), len(result))
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// Check if the total assigned replicas match the spec
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totalReplicas := int32(0)
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for i, cluster := range result {
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assert.Equal(t, tt.expectedResult[i].Name, cluster.Name)
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assert.Equal(t, tt.expectedResult[i].Replicas, cluster.Replicas)
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totalReplicas += cluster.Replicas
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}
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if tt.spec.Replicas > 0 {
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assert.Equal(t, tt.spec.Replicas, totalReplicas)
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}
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}
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})
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}
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}
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