statsd_exporter/bridge_test.go

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2013-07-02 16:16:39 +00:00
// Copyright (c) 2013, Prometheus Team
// All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"fmt"
"testing"
)
func TestHandlePacket(t *testing.T) {
scenarios := []struct {
name string
in string
out Events
}{
{
name: "empty",
}, {
name: "simple counter",
in: "foo:2|c",
out: Events{
&CounterEvent{
metricName: "foo",
value: 2,
},
},
}, {
name: "simple gauge",
in: "foo:3|g",
out: Events{
&GaugeEvent{
metricName: "foo",
value: 3,
},
},
}, {
name: "simple timer",
in: "foo:200|ms",
out: Events{
&TimerEvent{
metricName: "foo",
value: 200,
},
},
}, {
name: "combined multiline metrics",
in: "foo:200|ms:300|ms:5|c|@0.1:6|g\nbar:1|c:5|ms",
out: Events{
&TimerEvent{
metricName: "foo",
value: 200,
},
&TimerEvent{
metricName: "foo",
value: 300,
},
&CounterEvent{
metricName: "foo",
value: 50,
},
&GaugeEvent{
metricName: "foo",
value: 6,
},
&CounterEvent{
metricName: "bar",
value: 1,
},
&TimerEvent{
metricName: "bar",
value: 5,
},
},
}, {
name: "bad line",
in: "foo",
}, {
name: "bad component",
in: "foo:1",
}, {
name: "bad value",
in: "foo:1o|c",
}, {
name: "illegal sampling factor",
in: "foo:1|c|@bar",
}, {
name: "zero sampling factor",
in: "foo:2|c|@0",
out: Events{
&CounterEvent{
metricName: "foo",
value: 2,
},
},
}, {
name: "illegal stat type",
in: "foo:2|t",
},
}
l := StatsDListener{}
events := make(chan Events, 32)
for i, scenario := range scenarios {
l.handlePacket([]byte(scenario.in), events)
// Flatten actual events.
actual := Events{}
for i := 0; i < len(events); i++ {
actual = append(actual, <-events...)
}
if len(actual) != len(scenario.out) {
t.Fatalf("%d. Expected %d events, got %d", i, len(scenario.out), len(actual))
}
for j, expected := range scenario.out {
if fmt.Sprintf("%v", actual[j]) != fmt.Sprintf("%v", expected) {
t.Fatalf("%d.%d. Expected %v, got %v", i, j, actual[j], expected)
}
}
}
}