host_stats_provider_test.go

Documentation: k8s.io/kubernetes/pkg/kubelet/stats

     1  /*
     2  Copyright 2021 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 stats
    18  
    19  import (
    20  	"reflect"
    21  	"testing"
    22  
    23  	cadvisorapiv2 "github.com/google/cadvisor/info/v2"
    24  
    25  	kubecontainertest "k8s.io/kubernetes/pkg/kubelet/container/testing"
    26  
    27  	"k8s.io/apimachinery/pkg/types"
    28  	statsapi "k8s.io/kubelet/pkg/apis/stats/v1alpha1"
    29  )
    30  
    31  func Test_hostStatsProvider_getPodEtcHostsStats(t *testing.T) {
    32  	tests := []struct {
    33  		name                string
    34  		podEtcHostsPathFunc PodEtcHostsPathFunc
    35  		podUID              types.UID
    36  		rootFsInfo          *cadvisorapiv2.FsInfo
    37  		want                *statsapi.FsStats
    38  		wantErr             bool
    39  	}{
    40  		{
    41  			name: "Should return nil for runtimes that do not support etc host file",
    42  			podEtcHostsPathFunc: func(podUID types.UID) string {
    43  				return ""
    44  			},
    45  			podUID:     "fake0001",
    46  			rootFsInfo: nil,
    47  			want:       nil,
    48  			wantErr:    false,
    49  		},
    50  	}
    51  	for _, tt := range tests {
    52  		t.Run(tt.name, func(t *testing.T) {
    53  			h := hostStatsProvider{
    54  				osInterface:         &kubecontainertest.FakeOS{},
    55  				podEtcHostsPathFunc: tt.podEtcHostsPathFunc,
    56  			}
    57  			got, err := h.getPodEtcHostsStats(tt.podUID, tt.rootFsInfo)
    58  			if (err != nil) != tt.wantErr {
    59  				t.Errorf("getPodEtcHostsStats() error = %v, wantErr %v", err, tt.wantErr)
    60  				return
    61  			}
    62  			if !reflect.DeepEqual(got, tt.want) {
    63  				t.Errorf("getPodEtcHostsStats() got = %v, want %v", got, tt.want)
    64  			}
    65  		})
    66  	}
    67  }
    68
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