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https://github.com/prometheus/prometheus
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e041c0cd46
Move rulemanager to it's own package to break cicrular dependency. Make NewTestTieredStorage available to tests, remove duplication. Change-Id: I33b321245a44aa727bfc3614a7c9ae5005b34e03
110 lines
2.5 KiB
Go
110 lines
2.5 KiB
Go
// Copyright 2014 Prometheus Team
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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 templates
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import (
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"testing"
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clientmodel "github.com/prometheus/client_golang/model"
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"github.com/prometheus/prometheus/storage/metric/tiered"
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)
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type testTemplatesScenario struct {
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text string
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output string
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shouldFail bool
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}
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func TestTemplateExpansion(t *testing.T) {
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scenarios := []testTemplatesScenario{
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{
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// No template.
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text: "plain text",
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output: "plain text",
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},
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{
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// Simple value.
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text: "{{ 1 }}",
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output: "1",
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},
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{
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// Get value from query.
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text: "{{ query \"metric{instance='a'}\" | first | value }}",
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output: "11",
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},
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{
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// Get label from query.
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text: "{{ query \"metric{instance='a'}\" | first | label \"instance\" }}",
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output: "a",
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},
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{
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// Range over query.
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text: "{{ range query \"metric\" }}{{.Labels.instance}}:{{.Value}}: {{end}}",
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output: "a:11: b:21: ",
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},
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{
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// Unparsable template.
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text: "{{",
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shouldFail: true,
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},
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{
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// Error in function.
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text: "{{ query \"missing\" | first }}",
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shouldFail: true,
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},
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{
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// Panic.
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text: "{{ (query \"missing\").banana }}",
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shouldFail: true,
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},
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}
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time := clientmodel.Timestamp(0)
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ts, _ := tiered.NewTestTieredStorage(t)
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ts.AppendSamples(clientmodel.Samples{
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{
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Metric: clientmodel.Metric{
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clientmodel.MetricNameLabel: "metric",
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"instance": "a"},
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Value: 11,
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},
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{
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Metric: clientmodel.Metric{
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clientmodel.MetricNameLabel: "metric",
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"instance": "b"},
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Value: 21,
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},
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})
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for _, s := range scenarios {
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result, err := Expand(s.text, "test", nil, time, ts)
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if s.shouldFail {
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if err == nil {
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t.Fatalf("Error not returned from %v", s.text)
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}
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continue
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}
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if err != nil {
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t.Fatalf("Error returned from %v: %v", s.text, err)
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continue
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}
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if result != s.output {
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t.Fatalf("Error in result from %v: Expected '%v' Got '%v'", s.text, s.output, result)
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continue
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}
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}
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}
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