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// Copyright 2018 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package prometheus_test
import (
"bytes"
"encoding/json"
"time"
dto "github.com/prometheus/client_model/go"
"google.golang.org/protobuf/encoding/protojson"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/timestamppb"
)
// sanitizeMetric injects expected fake created timestamp value "1970-01-01T00:00:10Z",
// so we can compare it in examples. It modifies metric in-place, the returned pointer
// is for convenience.
func sanitizeMetric(metric *dto.Metric) *dto.Metric {
if metric.Counter != nil && metric.Counter.CreatedTimestamp != nil {
metric.Counter.CreatedTimestamp = timestamppb.New(time.Unix(10, 0))
}
if metric.Summary != nil && metric.Summary.CreatedTimestamp != nil {
metric.Summary.CreatedTimestamp = timestamppb.New(time.Unix(10, 0))
}
if metric.Histogram != nil && metric.Histogram.CreatedTimestamp != nil {
metric.Histogram.CreatedTimestamp = timestamppb.New(time.Unix(10, 0))
}
return metric
}
// sanitizeMetricFamily is like sanitizeMetric, but for multiple metrics.
func sanitizeMetricFamily(f *dto.MetricFamily) *dto.MetricFamily {
for _, m := range f.Metric {
sanitizeMetric(m)
}
return f
}
// toNormalizedJSON removes fake random space from proto JSON original marshaller.
// It is required, so we can compare proto messages in json format.
// Read more in https://github.com/golang/protobuf/issues/1121
func toNormalizedJSON(m proto.Message) string {
mAsJSON, err := protojson.Marshal(m)
if err != nil {
panic(err)
}
buffer := new(bytes.Buffer)
if err := json.Compact(buffer, mAsJSON); err != nil {
panic(err)
}
return buffer.String()
}