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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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{ |
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// HumanizeTimestamp - int. |
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text: "{{ range . }}{{ humanizeTimestamp . }}:{{ end }}", |
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input: []int64{0, -1, 1, 1234567, 9223372036}, |
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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:", |
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}, |
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{ |
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// HumanizeTimestamp - uint. |
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text: "{{ range . }}{{ humanizeTimestamp . }}:{{ end }}", |
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input: []uint64{0, 1, 1234567, 9223372036}, |
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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:", |
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}, |
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{ |
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// HumanizeTimestamp - int with error. |
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text: "{{ range . }}{{ humanizeTimestamp . }}:{{ end }}", |
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input: []int64{math.MinInt64, math.MaxInt64}, |
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shouldFail: true, |
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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`, |
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}, |
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{ |
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// HumanizeTimestamp - uint with error. |
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text: "{{ range . }}{{ humanizeTimestamp . }}:{{ end }}", |
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input: []uint64{math.MaxUint64}, |
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shouldFail: true, |
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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`, |
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}, |
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{ |
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// HumanizeTimestamp - model.SampleValue input - float64. |
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text: "{{ 1435065584.128 | humanizeTimestamp }}", |
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output: "2015-06-23 13:19:44.128 +0000 UTC", |
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}, |
|
|
{ |
|
|
// 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", |
|
|
}, |
|
|
}) |
|
|
} |
|
|
|
|
|
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) |
|
|
} |
|
|
} |
|
|
}
|
|
|
|
