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201 lines
4.8 KiB
201 lines
4.8 KiB
// 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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input interface{}
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shouldFail bool
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html 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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// HTML escaping.
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text: "{{ \"<b>\" }}",
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output: "<b>",
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html: true,
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},
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{
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// Disabling HTML escaping.
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text: "{{ \"<b>\" | safeHtml }}",
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output: "<b>",
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html: true,
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},
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{
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// HTML escaping doesn't apply to non-html.
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text: "{{ \"<b>\" }}",
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output: "<b>",
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},
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{
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// Pass multiple arguments to templates.
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text: "{{define \"x\"}}{{.arg0}} {{.arg1}}{{end}}{{template \"x\" (args 1 \"2\")}}",
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output: "1 2",
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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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// Regex replacement.
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text: "{{ reReplaceAll \"(a)b\" \"x$1\" \"ab\" }}",
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output: "xa",
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},
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{
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// Sorting.
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text: "{{ range query \"metric\" | sortByLabel \"instance\" }}{{.Labels.instance}} {{end}}",
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output: "a b ",
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},
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{
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// Humanize.
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text: "{{ range . }}{{ humanize . }}:{{ end }}",
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input: []float64{0.0, 1.0, 1234567.0, .12},
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output: "0:1:1.235M:120m:",
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},
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{
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// Humanize1024.
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text: "{{ range . }}{{ humanize1024 . }}:{{ end }}",
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input: []float64{0.0, 1.0, 1048576.0, .12},
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output: "0:1:1Mi:0.12:",
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},
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{
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// HumanizeDuration - seconds.
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text: "{{ range . }}{{ humanizeDuration . }}:{{ end }}",
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input: []float64{0, 1, 60, 3600, 86400, 86400 + 3600, -(86400*2 + 3600*3 + 60*4 + 5)},
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output: "0s:1s:1m 0s:1h 0m 0s:1d 0h 0m 0s:1d 1h 0m 0s:-2d 3h 4m 5s:",
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},
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{
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// HumanizeDuration - subsecond and fractional seconds.
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text: "{{ range . }}{{ humanizeDuration . }}:{{ end }}",
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input: []float64{.1, .0001, .12345, 60.1, 60.5, 1.2345, 12.345},
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output: "100ms:100us:123.5ms:1m 0s:1m 0s:1.235s:12.35s:",
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},
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{
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// Title.
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text: "{{ \"aa bb CC\" | title }}",
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output: "Aa Bb CC",
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},
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{
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// Match.
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text: "{{ match \"a+\" \"aa\" }} {{ match \"a+\" \"b\" }}",
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output: "true false",
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},
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{
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// graphLink.
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text: "{{ graphLink \"up\" }}",
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output: "/graph#%5B%7B%22expr%22%3A%22up%22%7D%5D",
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},
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{
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// tableLink.
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text: "{{ tableLink \"up\" }}",
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output: "/graph#%5B%7B%22expr%22%3A%22up%22%2C%22tab%22%3A1%7D%5D",
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},
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{
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// tmpl.
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text: "{{ define \"a\" }}x{{ end }}{{ $name := \"a\"}}{{ tmpl $name . }}",
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output: "x",
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html: 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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var result string
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var err error
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expander := NewTemplateExpander(s.text, "test", s.input, time, ts)
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if s.html {
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result, err = expander.ExpandHTML(nil)
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} else {
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result, err = expander.Expand()
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}
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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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