116 lines
2.7 KiB
Go
116 lines
2.7 KiB
Go
// Copyright 2018 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package testutil
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import (
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"strings"
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"testing"
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"github.com/prometheus/client_golang/prometheus"
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)
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func TestCollectAndCompare(t *testing.T) {
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const metadata = `
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# HELP some_total A value that represents a counter.
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# TYPE some_total counter
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`
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c := prometheus.NewCounter(prometheus.CounterOpts{
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Name: "some_total",
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Help: "A value that represents a counter.",
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ConstLabels: prometheus.Labels{
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"label1": "value1",
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},
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})
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c.Inc()
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expected := `
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some_total{ label1 = "value1" } 1
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`
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if err := CollectAndCompare(c, strings.NewReader(metadata+expected), "some_total"); err != nil {
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t.Errorf("unexpected collecting result:\n%s", err)
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}
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}
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func TestNoMetricFilter(t *testing.T) {
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const metadata = `
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# HELP some_total A value that represents a counter.
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# TYPE some_total counter
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`
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c := prometheus.NewCounter(prometheus.CounterOpts{
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Name: "some_total",
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Help: "A value that represents a counter.",
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ConstLabels: prometheus.Labels{
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"label1": "value1",
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},
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})
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c.Inc()
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expected := `
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some_total{label1="value1"} 1
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`
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if err := CollectAndCompare(c, strings.NewReader(metadata+expected)); err != nil {
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t.Errorf("unexpected collecting result:\n%s", err)
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}
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}
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func TestMetricNotFound(t *testing.T) {
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const metadata = `
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# HELP some_other_metric A value that represents a counter.
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# TYPE some_other_metric counter
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`
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c := prometheus.NewCounter(prometheus.CounterOpts{
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Name: "some_total",
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Help: "A value that represents a counter.",
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ConstLabels: prometheus.Labels{
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"label1": "value1",
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},
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})
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c.Inc()
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expected := `
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some_other_metric{label1="value1"} 1
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`
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expectedError := `
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metric output does not match expectation; want:
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# HELP some_other_metric A value that represents a counter.
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# TYPE some_other_metric counter
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some_other_metric{label1="value1"} 1
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got:
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# HELP some_total A value that represents a counter.
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# TYPE some_total counter
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some_total{label1="value1"} 1
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`
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err := CollectAndCompare(c, strings.NewReader(metadata+expected))
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if err == nil {
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t.Error("Expected error, got no error.")
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}
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if err.Error() != expectedError {
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t.Errorf("Expected\n%#+v\nGot:\n%#+v\n", expectedError, err.Error())
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}
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}
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