metrics_test.go

Documentation: k8s.io/kubernetes/pkg/controller/certificates/rootcacertpublisher

     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 rootcacertpublisher
    18  
    19  import (
    20  	"errors"
    21  	"strings"
    22  	"testing"
    23  	"time"
    24  
    25  	corev1 "k8s.io/api/core/v1"
    26  	apierrors "k8s.io/apimachinery/pkg/api/errors"
    27  	"k8s.io/component-base/metrics/legacyregistry"
    28  	"k8s.io/component-base/metrics/testutil"
    29  )
    30  
    31  func TestSyncCounter(t *testing.T) {
    32  	testCases := []struct {
    33  		desc    string
    34  		err     error
    35  		metrics []string
    36  		want    string
    37  	}{
    38  		{
    39  			desc: "nil error",
    40  			err:  nil,
    41  			metrics: []string{
    42  				"root_ca_cert_publisher_sync_total",
    43  			},
    44  			want: `
    45  # HELP root_ca_cert_publisher_sync_total [ALPHA] Number of namespace syncs happened in root ca cert publisher.
    46  # TYPE root_ca_cert_publisher_sync_total counter
    47  root_ca_cert_publisher_sync_total{code="200"} 1
    48  				`,
    49  		},
    50  		{
    51  			desc: "kube api error",
    52  			err:  apierrors.NewNotFound(corev1.Resource("configmap"), "test-configmap"),
    53  			metrics: []string{
    54  				"root_ca_cert_publisher_sync_total",
    55  			},
    56  			want: `
    57  # HELP root_ca_cert_publisher_sync_total [ALPHA] Number of namespace syncs happened in root ca cert publisher.
    58  # TYPE root_ca_cert_publisher_sync_total counter
    59  root_ca_cert_publisher_sync_total{code="404"} 1
    60  				`,
    61  		},
    62  		{
    63  			desc: "kube api error without code",
    64  			err:  &apierrors.StatusError{},
    65  			metrics: []string{
    66  				"root_ca_cert_publisher_sync_total",
    67  			},
    68  			want: `
    69  # HELP root_ca_cert_publisher_sync_total [ALPHA] Number of namespace syncs happened in root ca cert publisher.
    70  # TYPE root_ca_cert_publisher_sync_total counter
    71  root_ca_cert_publisher_sync_total{code="500"} 1
    72  				`,
    73  		},
    74  		{
    75  			desc: "general error",
    76  			err:  errors.New("test"),
    77  			metrics: []string{
    78  				"root_ca_cert_publisher_sync_total",
    79  			},
    80  			want: `
    81  # HELP root_ca_cert_publisher_sync_total [ALPHA] Number of namespace syncs happened in root ca cert publisher.
    82  # TYPE root_ca_cert_publisher_sync_total counter
    83  root_ca_cert_publisher_sync_total{code="500"} 1
    84  				`,
    85  		},
    86  	}
    87  
    88  	for _, tc := range testCases {
    89  		t.Run(tc.desc, func(t *testing.T) {
    90  			recordMetrics(time.Now(), tc.err)
    91  			defer syncCounter.Reset()
    92  			if err := testutil.GatherAndCompare(legacyregistry.DefaultGatherer, strings.NewReader(tc.want), tc.metrics...); err != nil {
    93  				t.Fatal(err)
    94  			}
    95  		})
    96  	}
    97  }
    98
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