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// Copyright 2014 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 template
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import (
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"context"
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"math"
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"net/url"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/model/labels"
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"github.com/prometheus/prometheus/promql"
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)
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func TestTemplateExpansion(t *testing.T) {
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testTemplateExpansion(t, []scenario{
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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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// Non-ASCII space (not allowed in text/template, see https://github.com/golang/go/blob/master/src/text/template/parse/lex.go#L98)
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text: "{{ }}",
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shouldFail: true,
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errorMsg: "error parsing template test: template: test:1: unrecognized character in action: U+00A0",
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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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text: "{{ query \"1.5\" | first | value }}",
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output: "1.5",
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queryResult: promql.Vector{{Point: promql.Point{T: 0, V: 1.5}}},
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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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queryResult: promql.Vector{
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{
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Metric: labels.FromStrings(labels.MetricName, "metric", "instance", "a"),
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Point: promql.Point{T: 0, V: 11},
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},
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},
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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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queryResult: promql.Vector{
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{
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Metric: labels.FromStrings(labels.MetricName, "metric", "instance", "a"),
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Point: promql.Point{T: 0, V: 11},
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},
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},
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output: "a",
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},
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{
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// Get label "__value__" from query.
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text: "{{ query \"metric{__value__='a'}\" | first | strvalue }}",
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queryResult: promql.Vector{
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{
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Metric: labels.FromStrings(labels.MetricName, "metric", "__value__", "a"),
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Point: promql.Point{T: 0, V: 11},
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},
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},
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output: "a",
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},
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{
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// Missing label is empty when using label function.
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text: "{{ query \"metric{instance='a'}\" | first | label \"foo\" }}",
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queryResult: promql.Vector{
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{
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Metric: labels.FromStrings(labels.MetricName, "metric", "instance", "a"),
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Point: promql.Point{T: 0, V: 11},
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},
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},
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output: "",
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},
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{
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// Missing label is empty when not using label function.
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text: "{{ $x := query \"metric\" | first }}{{ $x.Labels.foo }}",
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queryResult: promql.Vector{
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{
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Metric: labels.FromStrings(labels.MetricName, "metric", "instance", "a"),
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Point: promql.Point{T: 0, V: 11},
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},
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},
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output: "",
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},
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{
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text: "{{ $x := query \"metric\" | first }}{{ $x.Labels.foo }}",
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queryResult: promql.Vector{
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{
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Metric: labels.FromStrings(labels.MetricName, "metric", "instance", "a"),
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Point: promql.Point{T: 0, V: 11},
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},
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},
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output: "",
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html: true,
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},
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{
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// Range over query and sort by label.
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text: "{{ range query \"metric\" | sortByLabel \"instance\" }}{{.Labels.instance}}:{{.Value}}: {{end}}",
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queryResult: promql.Vector{
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{
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Metric: labels.FromStrings(labels.MetricName, "metric", "instance", "b"),
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Point: promql.Point{T: 0, V: 21},
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}, {
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Metric: labels.FromStrings(labels.MetricName, "metric", "instance", "a"),
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Point: promql.Point{T: 0, V: 11},
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},
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},
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output: "a:11: b:21: ",
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},
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{
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// Simple hostname.
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text: "{{ \"foo.example.com\" | stripPort }}",
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output: "foo.example.com",
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},
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{
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// Hostname with port.
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text: "{{ \"foo.example.com:12345\" | stripPort }}",
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output: "foo.example.com",
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},
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{
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// Simple IPv4 address.
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text: "{{ \"192.0.2.1\" | stripPort }}",
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output: "192.0.2.1",
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},
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{
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// IPv4 address with port.
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text: "{{ \"192.0.2.1:12345\" | stripPort }}",
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output: "192.0.2.1",
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},
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{
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// Simple IPv6 address.
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text: "{{ \"2001:0DB8::1\" | stripPort }}",
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output: "2001:0DB8::1",
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},
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{
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// IPv6 address with port.
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text: "{{ \"[2001:0DB8::1]:12345\" | stripPort }}",
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output: "2001:0DB8::1",
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},
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{
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// Value can't be split into host and port.
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text: "{{ \"[2001:0DB8::1]::12345\" | stripPort }}",
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output: "[2001:0DB8::1]::12345",
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},
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{
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// Missing value is no value for nil options.
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text: "{{ .Foo }}",
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output: "<no value>",
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},
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{
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// Missing value is no value for no options.
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text: "{{ .Foo }}",
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options: make([]string, 0),
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output: "<no value>",
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},
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{
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// Assert that missing value returns error with missingkey=error.
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text: "{{ .Foo }}",
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options: []string{"missingkey=error"},
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shouldFail: true,
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errorMsg: `error executing template test: template: test:1:3: executing "test" at <.Foo>: nil data; no entry for key "Foo"`,
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},
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{
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// Missing value is "" for nil options in ExpandHTML.
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text: "{{ .Foo }}",
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output: "",
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html: true,
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},
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{
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// Missing value is "" for no options in ExpandHTML.
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text: "{{ .Foo }}",
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options: make([]string, 0),
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output: "",
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html: true,
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},
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{
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// Assert that missing value returns error with missingkey=error in ExpandHTML.
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text: "{{ .Foo }}",
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options: []string{"missingkey=error"},
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shouldFail: true,
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errorMsg: `error executing template test: template: test:1:3: executing "test" at <.Foo>: nil data; no entry for key "Foo"`,
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html: true,
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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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errorMsg: "error parsing template test: template: test:1: unclosed action",
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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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queryResult: promql.Vector{},
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shouldFail: true,
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errorMsg: "error executing template test: template: test:1:21: executing \"test\" at <first>: error calling first: first() called on vector with no elements",
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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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queryResult: promql.Vector{},
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shouldFail: true,
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errorMsg: "error executing template test: template: test:1:10: executing \"test\" at <\"missing\">: can't evaluate field banana in type template.queryResult",
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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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// Humanize - float64.
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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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// Humanize - string.
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text: "{{ range . }}{{ humanize . }}:{{ end }}",
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input: []string{"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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// Humanize - string with error.
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text: `{{ humanize "one" }}`,
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shouldFail: true,
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errorMsg: `error executing template test: template: test:1:3: executing "test" at <humanize "one">: error calling humanize: strconv.ParseFloat: parsing "one": invalid syntax`,
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},
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{
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// Humanize - int.
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text: "{{ range . }}{{ humanize . }}:{{ end }}",
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input: []int64{0, -1, 1, 1234567, math.MaxInt64},
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output: "0:-1:1:1.235M:9.223E:",
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},
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{
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// Humanize - uint.
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text: "{{ range . }}{{ humanize . }}:{{ end }}",
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input: []uint64{0, 1, 1234567, math.MaxUint64},
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output: "0:1:1.235M:18.45E:",
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},
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{
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// Humanize1024 - float64.
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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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// Humanize1024 - string.
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text: "{{ range . }}{{ humanize1024 . }}:{{ end }}",
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input: []string{"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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// Humanize1024 - string with error.
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text: `{{ humanize1024 "one" }}`,
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shouldFail: true,
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errorMsg: `error executing template test: template: test:1:3: executing "test" at <humanize1024 "one">: error calling humanize1024: strconv.ParseFloat: parsing "one": invalid syntax`,
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},
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{
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// Humanize1024 - int.
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text: "{{ range . }}{{ humanize1024 . }}:{{ end }}",
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input: []int64{0, -1, 1, 1234567, math.MaxInt64},
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output: "0:-1:1:1.177Mi:8Ei:",
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},
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{
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// Humanize1024 - uint.
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text: "{{ range . }}{{ humanize1024 . }}:{{ end }}",
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input: []uint64{0, 1, 1234567, math.MaxUint64},
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output: "0:1:1.177Mi:16Ei:",
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},
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{
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// HumanizeDuration - seconds - float64.
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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), 899.99},
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output: "0s:1s:1m 0s:1h 0m 0s:1d 0h 0m 0s:1d 1h 0m 0s:-2d 3h 4m 5s:14m 59s:",
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},
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{
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// HumanizeDuration - seconds - string.
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text: "{{ range . }}{{ humanizeDuration . }}:{{ end }}",
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input: []string{"0", "1", "60", "3600", "86400"},
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output: "0s:1s:1m 0s:1h 0m 0s:1d 0h 0m 0s:",
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},
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{
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// HumanizeDuration - subsecond and fractional seconds - float64.
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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:1.234s:12.35s:",
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},
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{
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// HumanizeDuration - subsecond and fractional seconds - string.
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text: "{{ range . }}{{ humanizeDuration . }}:{{ end }}",
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input: []string{".1", ".0001", ".12345", "60.1", "60.5", "1.2345", "12.345"},
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output: "100ms:100us:123.5ms:1m 0s:1m 0s:1.234s:12.35s:",
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},
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{
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// HumanizeDuration - string with error.
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text: `{{ humanizeDuration "one" }}`,
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shouldFail: true,
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errorMsg: `error executing template test: template: test:1:3: executing "test" at <humanizeDuration "one">: error calling humanizeDuration: strconv.ParseFloat: parsing "one": invalid syntax`,
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},
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{
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// HumanizeDuration - int.
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text: "{{ range . }}{{ humanizeDuration . }}:{{ end }}",
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input: []int{0, -1, 1, 1234567},
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output: "0s:-1s:1s:14d 6h 56m 7s:",
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},
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{
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// HumanizeDuration - uint.
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text: "{{ range . }}{{ humanizeDuration . }}:{{ end }}",
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input: []uint{0, 1, 1234567},
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output: "0s:1s:14d 6h 56m 7s:",
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},
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{
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// Humanize* Inf and NaN - float64.
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text: "{{ range . }}{{ humanize . }}:{{ humanize1024 . }}:{{ humanizeDuration . }}:{{humanizeTimestamp .}}:{{ end }}",
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input: []float64{math.Inf(1), math.Inf(-1), math.NaN()},
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output: "+Inf:+Inf:+Inf:+Inf:-Inf:-Inf:-Inf:-Inf:NaN:NaN:NaN:NaN:",
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},
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{
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// Humanize* Inf and NaN - string.
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text: "{{ range . }}{{ humanize . }}:{{ humanize1024 . }}:{{ humanizeDuration . }}:{{humanizeTimestamp .}}:{{ end }}",
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input: []string{"+Inf", "-Inf", "NaN"},
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output: "+Inf:+Inf:+Inf:+Inf:-Inf:-Inf:-Inf:-Inf:NaN:NaN:NaN:NaN:",
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},
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{
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// HumanizePercentage - model.SampleValue input - float64.
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text: "{{ -0.22222 | humanizePercentage }}:{{ 0.0 | humanizePercentage }}:{{ 0.1234567 | humanizePercentage }}:{{ 1.23456 | humanizePercentage }}",
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output: "-22.22%:0%:12.35%:123.5%",
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},
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{
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// HumanizePercentage - int.
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text: "{{ range . }}{{ humanizePercentage . }}:{{ end }}",
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input: []int64{0, -1, 1, 1234567, math.MaxInt64},
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output: "0%:-100%:100%:1.235e+08%:9.223e+20%:",
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},
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{
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// HumanizePercentage - uint.
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text: "{{ range . }}{{ humanizePercentage . }}:{{ end }}",
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input: []uint64{0, 1, 1234567, math.MaxUint64},
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output: "0%:100%:1.235e+08%:1.845e+21%:",
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},
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{
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// HumanizePercentage - model.SampleValue input - string.
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text: `{{ "-0.22222" | humanizePercentage }}:{{ "0.0" | humanizePercentage }}:{{ "0.1234567" | humanizePercentage }}:{{ "1.23456" | humanizePercentage }}`,
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output: "-22.22%:0%:12.35%:123.5%",
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},
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{
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// HumanizePercentage - model.SampleValue input - string with error.
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text: `{{ "one" | humanizePercentage }}`,
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shouldFail: true,
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errorMsg: `error executing template test: template: test:1:11: executing "test" at <humanizePercentage>: error calling humanizePercentage: strconv.ParseFloat: parsing "one": invalid syntax`,
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},
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{
|
|
|
// HumanizeTimestamp - int.
|
|
|
text: "{{ range . }}{{ humanizeTimestamp . }}:{{ end }}",
|
|
|
input: []int64{0, -1, 1, 1234567, 9223372036},
|
|
|
output: "1970-01-01 00:00:00 +0000 UTC:1969-12-31 23:59:59 +0000 UTC:1970-01-01 00:00:01 +0000 UTC:1970-01-15 06:56:07 +0000 UTC:2262-04-11 23:47:16 +0000 UTC:",
|
|
|
},
|
|
|
{
|
|
|
// HumanizeTimestamp - uint.
|
|
|
text: "{{ range . }}{{ humanizeTimestamp . }}:{{ end }}",
|
|
|
input: []uint64{0, 1, 1234567, 9223372036},
|
|
|
output: "1970-01-01 00:00:00 +0000 UTC:1970-01-01 00:00:01 +0000 UTC:1970-01-15 06:56:07 +0000 UTC:2262-04-11 23:47:16 +0000 UTC:",
|
|
|
},
|
|
|
{
|
|
|
// HumanizeTimestamp - int with error.
|
|
|
text: "{{ range . }}{{ humanizeTimestamp . }}:{{ end }}",
|
|
|
input: []int64{math.MinInt64, math.MaxInt64},
|
|
|
shouldFail: true,
|
|
|
errorMsg: `error executing template test: template: test:1:16: executing "test" at <humanizeTimestamp .>: error calling humanizeTimestamp: -9.223372036854776e+18 cannot be represented as a nanoseconds timestamp since it overflows int64`,
|
|
|
},
|
|
|
{
|
|
|
// HumanizeTimestamp - uint with error.
|
|
|
text: "{{ range . }}{{ humanizeTimestamp . }}:{{ end }}",
|
|
|
input: []uint64{math.MaxUint64},
|
|
|
shouldFail: true,
|
|
|
errorMsg: `error executing template test: template: test:1:16: executing "test" at <humanizeTimestamp .>: error calling humanizeTimestamp: 1.8446744073709552e+19 cannot be represented as a nanoseconds timestamp since it overflows int64`,
|
|
|
},
|
|
|
{
|
|
|
// HumanizeTimestamp - model.SampleValue input - float64.
|
|
|
text: "{{ 1435065584.128 | humanizeTimestamp }}",
|
|
|
output: "2015-06-23 13:19:44.128 +0000 UTC",
|
|
|
},
|
|
|
{
|
|
|
// HumanizeTimestamp - model.SampleValue input - string.
|
|
|
text: `{{ "1435065584.128" | humanizeTimestamp }}`,
|
|
|
output: "2015-06-23 13:19:44.128 +0000 UTC",
|
|
|
},
|
|
|
{
|
|
|
// Title.
|
|
|
text: "{{ \"aa bb CC\" | title }}",
|
|
|
output: "Aa Bb CC",
|
|
|
},
|
|
|
{
|
|
|
// toUpper.
|
|
|
text: "{{ \"aa bb CC\" | toUpper }}",
|
|
|
output: "AA BB CC",
|
|
|
},
|
|
|
{
|
|
|
// toLower.
|
|
|
text: "{{ \"aA bB CC\" | toLower }}",
|
|
|
output: "aa bb cc",
|
|
|
},
|
|
|
{
|
|
|
// Match.
|
|
|
text: "{{ match \"a+\" \"aa\" }} {{ match \"a+\" \"b\" }}",
|
|
|
output: "true false",
|
|
|
},
|
|
|
{
|
|
|
// graphLink.
|
|
|
text: "{{ graphLink \"up\" }}",
|
|
|
output: "/graph?g0.expr=up&g0.tab=0",
|
|
|
},
|
|
|
{
|
|
|
// tableLink.
|
|
|
text: "{{ tableLink \"up\" }}",
|
|
|
output: "/graph?g0.expr=up&g0.tab=1",
|
|
|
},
|
|
|
{
|
|
|
// tmpl.
|
|
|
text: "{{ define \"a\" }}x{{ end }}{{ $name := \"a\"}}{{ tmpl $name . }}",
|
|
|
output: "x",
|
|
|
html: true,
|
|
|
},
|
|
|
{
|
|
|
// pathPrefix.
|
|
|
text: "{{ pathPrefix }}",
|
|
|
output: "/path/prefix",
|
|
|
},
|
|
|
{
|
|
|
// externalURL.
|
|
|
text: "{{ externalURL }}",
|
|
|
output: "http://testhost:9090/path/prefix",
|
|
|
},
|
|
|
{
|
|
|
// parseDuration (using printf to ensure the return is a string).
|
|
|
text: "{{ printf \"%0.2f\" (parseDuration \"1h2m10ms\") }}",
|
|
|
output: "3720.01",
|
|
|
},
|
|
|
{
|
|
|
// Simple hostname.
|
|
|
text: "{{ \"foo.example.com\" | stripDomain }}",
|
|
|
output: "foo",
|
|
|
},
|
|
|
{
|
|
|
// Hostname with port.
|
|
|
text: "{{ \"foo.example.com:12345\" | stripDomain }}",
|
|
|
output: "foo:12345",
|
|
|
},
|
|
|
{
|
|
|
// Simple IPv4 address.
|
|
|
text: "{{ \"192.0.2.1\" | stripDomain }}",
|
|
|
output: "192.0.2.1",
|
|
|
},
|
|
|
{
|
|
|
// IPv4 address with port.
|
|
|
text: "{{ \"192.0.2.1:12345\" | stripDomain }}",
|
|
|
output: "192.0.2.1:12345",
|
|
|
},
|
|
|
{
|
|
|
// Simple IPv6 address.
|
|
|
text: "{{ \"2001:0DB8::1\" | stripDomain }}",
|
|
|
output: "2001:0DB8::1",
|
|
|
},
|
|
|
{
|
|
|
// IPv6 address with port.
|
|
|
text: "{{ \"[2001:0DB8::1]:12345\" | stripDomain }}",
|
|
|
output: "[2001:0DB8::1]:12345",
|
|
|
},
|
|
|
{
|
|
|
// Value can't be split into host and port.
|
|
|
text: "{{ \"[2001:0DB8::1]::12345\" | stripDomain }}",
|
|
|
output: "[2001:0DB8::1]::12345",
|
|
|
},
|
|
|
})
|
|
|
}
|
|
|
|
|
|
type scenario struct {
|
|
|
text string
|
|
|
output string
|
|
|
input interface{}
|
|
|
options []string
|
|
|
queryResult promql.Vector
|
|
|
shouldFail bool
|
|
|
html bool
|
|
|
errorMsg string
|
|
|
}
|
|
|
|
|
|
func testTemplateExpansion(t *testing.T, scenarios []scenario) {
|
|
|
extURL, err := url.Parse("http://testhost:9090/path/prefix")
|
|
|
if err != nil {
|
|
|
panic(err)
|
|
|
}
|
|
|
|
|
|
for _, s := range scenarios {
|
|
|
queryFunc := func(_ context.Context, _ string, _ time.Time) (promql.Vector, error) {
|
|
|
return s.queryResult, nil
|
|
|
}
|
|
|
var result string
|
|
|
var err error
|
|
|
expander := NewTemplateExpander(context.Background(), s.text, "test", s.input, 0, queryFunc, extURL, s.options)
|
|
|
if s.html {
|
|
|
result, err = expander.ExpandHTML(nil)
|
|
|
} else {
|
|
|
result, err = expander.Expand()
|
|
|
}
|
|
|
if s.shouldFail {
|
|
|
require.Error(t, err, "%v", s.text)
|
|
|
require.EqualError(t, err, s.errorMsg)
|
|
|
continue
|
|
|
}
|
|
|
|
|
|
require.NoError(t, err)
|
|
|
|
|
|
if err == nil {
|
|
|
require.Equal(t, s.output, result)
|
|
|
}
|
|
|
}
|
|
|
}
|
