forked from mirrors/statsd_exporter
53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
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// Copyright 2013 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 main
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import (
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"testing"
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"time"
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)
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// TestNegativeCounter validates when we send a negative
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// number to a counter that we no longer panic the Exporter Listener.
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func TestNegativeCounter(t *testing.T) {
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defer func() {
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if e := recover(); e != nil {
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err := e.(error)
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if err.Error() == "counter cannot decrease in value" {
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t.Fatalf("Counter was negative and causes a panic.")
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} else {
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t.Fatalf("Unknown panic and error: %q", err.Error())
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}
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}
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}()
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events := make(chan Events, 1)
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c := Events{
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&CounterEvent{
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metricName: "foo",
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value: -1,
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},
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}
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events <- c
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ex := NewExporter(&metricMapper{})
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// Close channel to signify we are done with the listener after a short period.
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go func() {
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time.Sleep(time.Millisecond * 100)
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close(events)
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}()
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ex.Listen(events)
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}
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