135 lines
2.3 KiB
Go
135 lines
2.3 KiB
Go
// Copyright (c) 2013, Prometheus Team
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// All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package prometheus
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import (
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"encoding/json"
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"testing"
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)
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func testGauge(t tester) {
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type input struct {
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steps []func(g Gauge)
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}
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type output struct {
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value string
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}
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var scenarios = []struct {
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in input
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out output
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}{
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{
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in: input{
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steps: []func(g Gauge){},
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},
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out: output{
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value: `{"type":"gauge","value":[]}`,
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},
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},
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{
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in: input{
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steps: []func(g Gauge){
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func(g Gauge) {
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g.Set(nil, 1)
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},
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},
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},
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out: output{
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value: `{"type":"gauge","value":[{"labels":{},"value":1}]}`,
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},
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},
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{
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in: input{
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steps: []func(g Gauge){
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func(g Gauge) {
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g.Set(map[string]string{}, 2)
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},
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},
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},
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out: output{
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value: `{"type":"gauge","value":[{"labels":{},"value":2}]}`,
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},
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},
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{
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in: input{
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steps: []func(g Gauge){
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func(g Gauge) {
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g.Set(map[string]string{}, 3)
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},
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func(g Gauge) {
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g.Set(map[string]string{}, 5)
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},
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},
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},
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out: output{
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value: `{"type":"gauge","value":[{"labels":{},"value":5}]}`,
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},
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},
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{
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in: input{
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steps: []func(g Gauge){
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func(g Gauge) {
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g.Set(map[string]string{"handler": "/foo"}, 13)
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},
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func(g Gauge) {
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g.Set(map[string]string{"handler": "/bar"}, 17)
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},
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func(g Gauge) {
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g.ResetAll()
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},
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},
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},
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out: output{
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value: `{"type":"gauge","value":[]}`,
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},
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},
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{
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in: input{
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steps: []func(g Gauge){
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func(g Gauge) {
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g.Set(map[string]string{"handler": "/foo"}, 19)
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},
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},
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},
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out: output{
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value: `{"type":"gauge","value":[{"labels":{"handler":"/foo"},"value":19}]}`,
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},
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},
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}
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for i, scenario := range scenarios {
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gauge := NewGauge()
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for _, step := range scenario.in.steps {
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step(gauge)
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}
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bytes, err := json.Marshal(gauge)
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if err != nil {
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t.Errorf("%d. could not marshal into JSON %s", i, err)
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continue
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}
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asString := string(bytes)
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if scenario.out.value != asString {
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t.Errorf("%d. expected %q, got %q", i, scenario.out.value, asString)
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}
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}
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}
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func TestGauge(t *testing.T) {
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testGauge(t)
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}
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func BenchmarkGauge(b *testing.B) {
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for i := 0; i < b.N; i++ {
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testGauge(b)
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}
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}
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