mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-14 09:34:05 -08:00
9e500345f3
So far, if a target exposes a histogram with both classic and native buckets, a native-histogram enabled Prometheus would ignore the classic buckets. With the new scrape config option `scrape_classic_histograms` set, both buckets will be ingested, creating all the series of a classic histogram in parallel to the native histogram series. For example, a histogram `foo` would create a native histogram series `foo` and classic series called `foo_sum`, `foo_count`, and `foo_bucket`. This feature can be used in a migration strategy from classic to native histograms, where it is desired to have a transition period during which both native and classic histograms are present. Note that two bugs in classic histogram parsing were found and fixed as a byproduct of testing the new feature: 1. Series created from classic _gauge_ histograms didn't get the _sum/_count/_bucket prefix set. 2. Values of classic _float_ histograms weren't parsed properly. Signed-off-by: beorn7 <beorn@grafana.com>
105 lines
2.9 KiB
Go
105 lines
2.9 KiB
Go
// Copyright 2022 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 textparse
|
|
|
|
import (
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
func TestNewParser(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
requirePromParser := func(t *testing.T, p Parser) {
|
|
require.NotNil(t, p)
|
|
_, ok := p.(*PromParser)
|
|
require.True(t, ok)
|
|
}
|
|
|
|
requireOpenMetricsParser := func(t *testing.T, p Parser) {
|
|
require.NotNil(t, p)
|
|
_, ok := p.(*OpenMetricsParser)
|
|
require.True(t, ok)
|
|
}
|
|
|
|
for name, tt := range map[string]*struct {
|
|
contentType string
|
|
validateParser func(*testing.T, Parser)
|
|
err string
|
|
}{
|
|
"empty-string": {
|
|
validateParser: requirePromParser,
|
|
},
|
|
"invalid-content-type-1": {
|
|
contentType: "invalid/",
|
|
validateParser: requirePromParser,
|
|
err: "expected token after slash",
|
|
},
|
|
"invalid-content-type-2": {
|
|
contentType: "invalid/invalid/invalid",
|
|
validateParser: requirePromParser,
|
|
err: "unexpected content after media subtype",
|
|
},
|
|
"invalid-content-type-3": {
|
|
contentType: "/",
|
|
validateParser: requirePromParser,
|
|
err: "no media type",
|
|
},
|
|
"invalid-content-type-4": {
|
|
contentType: "application/openmetrics-text; charset=UTF-8; charset=utf-8",
|
|
validateParser: requirePromParser,
|
|
err: "duplicate parameter name",
|
|
},
|
|
"openmetrics": {
|
|
contentType: "application/openmetrics-text",
|
|
validateParser: requireOpenMetricsParser,
|
|
},
|
|
"openmetrics-with-charset": {
|
|
contentType: "application/openmetrics-text; charset=utf-8",
|
|
validateParser: requireOpenMetricsParser,
|
|
},
|
|
"openmetrics-with-charset-and-version": {
|
|
contentType: "application/openmetrics-text; version=1.0.0; charset=utf-8",
|
|
validateParser: requireOpenMetricsParser,
|
|
},
|
|
"plain-text": {
|
|
contentType: "text/plain",
|
|
validateParser: requirePromParser,
|
|
},
|
|
"plain-text-with-version": {
|
|
contentType: "text/plain; version=0.0.4",
|
|
validateParser: requirePromParser,
|
|
},
|
|
"some-other-valid-content-type": {
|
|
contentType: "text/html",
|
|
validateParser: requirePromParser,
|
|
},
|
|
} {
|
|
t.Run(name, func(t *testing.T) {
|
|
tt := tt // Copy to local variable before going parallel.
|
|
t.Parallel()
|
|
|
|
p, err := New([]byte{}, tt.contentType, false)
|
|
tt.validateParser(t, p)
|
|
if tt.err == "" {
|
|
require.NoError(t, err)
|
|
} else {
|
|
require.Error(t, err)
|
|
require.Contains(t, err.Error(), tt.err)
|
|
}
|
|
})
|
|
}
|
|
}
|