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| 1 | +// |
| 2 | +// DISCLAIMER |
| 3 | +// |
| 4 | +// Copyright 2023 ArangoDB GmbH, Cologne, Germany |
| 5 | +// |
| 6 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | +// you may not use this file except in compliance with the License. |
| 8 | +// You may obtain a copy of the License at |
| 9 | +// |
| 10 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | +// |
| 12 | +// Unless required by applicable law or agreed to in writing, software |
| 13 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | +// See the License for the specific language governing permissions and |
| 16 | +// limitations under the License. |
| 17 | +// |
| 18 | +// Copyright holder is ArangoDB GmbH, Cologne, Germany |
| 19 | +// |
| 20 | + |
| 21 | +package metrics |
| 22 | + |
| 23 | +import ( |
| 24 | + "compress/gzip" |
| 25 | + "fmt" |
| 26 | + "io" |
| 27 | + "net/http" |
| 28 | + "testing" |
| 29 | + |
| 30 | + dto "github.com/prometheus/client_model/go" |
| 31 | + "github.com/prometheus/prom2json" |
| 32 | + "github.com/stretchr/testify/require" |
| 33 | + |
| 34 | + operatorHTTP "github.com/arangodb/kube-arangodb/pkg/util/http" |
| 35 | +) |
| 36 | + |
| 37 | +func Test_Handler(t *testing.T) { |
| 38 | + m := http.NewServeMux() |
| 39 | + |
| 40 | + m.HandleFunc("/metrics", Handler()) |
| 41 | + m.HandleFunc("/empty", operatorHTTP.WithNoContent(func(writer http.ResponseWriter, request *http.Request) { |
| 42 | + |
| 43 | + })) |
| 44 | + |
| 45 | + endpoint, c := StartHTTP(t, m) |
| 46 | + defer c() |
| 47 | + |
| 48 | + metricsEndpoint := fmt.Sprintf("%s/metrics", endpoint) |
| 49 | + emptyEndpoint := fmt.Sprintf("%s/empty", endpoint) |
| 50 | + |
| 51 | + t.Run("Get metrics in plain", func(t *testing.T) { |
| 52 | + r, err := http.NewRequest("GET", metricsEndpoint, nil) |
| 53 | + require.NoError(t, err) |
| 54 | + |
| 55 | + r.Header.Add("Accept-Encoding", "identity") |
| 56 | + |
| 57 | + resp, err := http.DefaultClient.Do(r) |
| 58 | + require.NoError(t, err) |
| 59 | + |
| 60 | + require.Equal(t, http.StatusOK, resp.StatusCode) |
| 61 | + |
| 62 | + data, err := io.ReadAll(resp.Body) |
| 63 | + require.NoError(t, err) |
| 64 | + |
| 65 | + require.True(t, len(data) > 0) |
| 66 | + }) |
| 67 | + |
| 68 | + t.Run("Get metrics in gzip", func(t *testing.T) { |
| 69 | + r, err := http.NewRequest("GET", metricsEndpoint, nil) |
| 70 | + require.NoError(t, err) |
| 71 | + |
| 72 | + r.Header.Add("Accept-Encoding", "gzip") |
| 73 | + |
| 74 | + resp, err := http.DefaultClient.Do(r) |
| 75 | + require.NoError(t, err) |
| 76 | + |
| 77 | + require.Equal(t, http.StatusOK, resp.StatusCode) |
| 78 | + |
| 79 | + data, err := io.ReadAll(resp.Body) |
| 80 | + require.NoError(t, err) |
| 81 | + |
| 82 | + require.True(t, len(data) > 0) |
| 83 | + }) |
| 84 | + |
| 85 | + t.Run("Get metrics in default", func(t *testing.T) { |
| 86 | + r, err := http.NewRequest("GET", metricsEndpoint, nil) |
| 87 | + require.NoError(t, err) |
| 88 | + |
| 89 | + resp, err := http.DefaultClient.Do(r) |
| 90 | + require.NoError(t, err) |
| 91 | + |
| 92 | + require.Equal(t, http.StatusOK, resp.StatusCode) |
| 93 | + |
| 94 | + data, err := io.ReadAll(resp.Body) |
| 95 | + require.NoError(t, err) |
| 96 | + |
| 97 | + require.True(t, len(data) > 0) |
| 98 | + }) |
| 99 | + |
| 100 | + t.Run("Get empty", func(t *testing.T) { |
| 101 | + r, err := http.NewRequest("GET", emptyEndpoint, nil) |
| 102 | + require.NoError(t, err) |
| 103 | + |
| 104 | + resp, err := http.DefaultClient.Do(r) |
| 105 | + require.NoError(t, err) |
| 106 | + |
| 107 | + require.Equal(t, http.StatusNoContent, resp.StatusCode) |
| 108 | + |
| 109 | + data, err := io.ReadAll(resp.Body) |
| 110 | + require.NoError(t, err) |
| 111 | + |
| 112 | + require.True(t, len(data) == 0) |
| 113 | + }) |
| 114 | + |
| 115 | + t.Run("Read metrics - plain", func(t *testing.T) { |
| 116 | + mfChan := make(chan *dto.MetricFamily, 1024*1024) |
| 117 | + |
| 118 | + r, err := http.NewRequest("GET", metricsEndpoint, nil) |
| 119 | + require.NoError(t, err) |
| 120 | + |
| 121 | + r.Header.Add("Accept-Encoding", "identity") |
| 122 | + |
| 123 | + resp, err := http.DefaultClient.Do(r) |
| 124 | + require.NoError(t, err) |
| 125 | + |
| 126 | + require.Equal(t, http.StatusOK, resp.StatusCode) |
| 127 | + |
| 128 | + require.NoError(t, prom2json.ParseReader(resp.Body, mfChan)) |
| 129 | + |
| 130 | + metrics := map[string]bool{} |
| 131 | + |
| 132 | + for mf := range mfChan { |
| 133 | + result := prom2json.NewFamily(mf) |
| 134 | + metrics[result.Name] = true |
| 135 | + } |
| 136 | + |
| 137 | + require.Contains(t, metrics, "go_info") |
| 138 | + }) |
| 139 | + |
| 140 | + t.Run("Read metrics - gzip", func(t *testing.T) { |
| 141 | + mfChan := make(chan *dto.MetricFamily, 1024*1024) |
| 142 | + |
| 143 | + r, err := http.NewRequest("GET", metricsEndpoint, nil) |
| 144 | + require.NoError(t, err) |
| 145 | + |
| 146 | + r.Header.Add("Accept-Encoding", "gzip") |
| 147 | + |
| 148 | + resp, err := http.DefaultClient.Do(r) |
| 149 | + require.NoError(t, err) |
| 150 | + |
| 151 | + require.Equal(t, http.StatusOK, resp.StatusCode) |
| 152 | + |
| 153 | + reader, err := gzip.NewReader(resp.Body) |
| 154 | + require.NoError(t, err) |
| 155 | + |
| 156 | + require.NoError(t, prom2json.ParseReader(reader, mfChan)) |
| 157 | + |
| 158 | + metrics := map[string]bool{} |
| 159 | + |
| 160 | + for mf := range mfChan { |
| 161 | + result := prom2json.NewFamily(mf) |
| 162 | + metrics[result.Name] = true |
| 163 | + } |
| 164 | + |
| 165 | + require.Contains(t, metrics, "go_info") |
| 166 | + }) |
| 167 | + |
| 168 | + t.Run("Read metrics - default", func(t *testing.T) { |
| 169 | + mfChan := make(chan *dto.MetricFamily, 1024*1024) |
| 170 | + |
| 171 | + r, err := http.NewRequest("GET", metricsEndpoint, nil) |
| 172 | + require.NoError(t, err) |
| 173 | + |
| 174 | + resp, err := http.DefaultClient.Do(r) |
| 175 | + require.NoError(t, err) |
| 176 | + |
| 177 | + require.Equal(t, http.StatusOK, resp.StatusCode) |
| 178 | + |
| 179 | + require.NoError(t, prom2json.ParseReader(resp.Body, mfChan)) |
| 180 | + |
| 181 | + metrics := map[string]bool{} |
| 182 | + |
| 183 | + for mf := range mfChan { |
| 184 | + result := prom2json.NewFamily(mf) |
| 185 | + metrics[result.Name] = true |
| 186 | + } |
| 187 | + |
| 188 | + require.Contains(t, metrics, "go_info") |
| 189 | + }) |
| 190 | +} |
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