mirror of
https://github.com/autc04/Retro68.git
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265 lines
7.6 KiB
Go
265 lines
7.6 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package template
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import (
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"bytes"
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"errors"
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"fmt"
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"io/ioutil"
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"sync"
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"testing"
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"text/template/parse"
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)
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func TestAddParseTree(t *testing.T) {
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root := Must(New("root").Parse(`{{define "a"}} {{.}} {{template "b"}} {{.}} "></a>{{end}}`))
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tree, err := parse.Parse("t", `{{define "b"}}<a href="{{end}}`, "", "", nil, nil)
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if err != nil {
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t.Fatal(err)
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}
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added := Must(root.AddParseTree("b", tree["b"]))
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b := new(bytes.Buffer)
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err = added.ExecuteTemplate(b, "a", "1>0")
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if err != nil {
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t.Fatal(err)
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}
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if got, want := b.String(), ` 1>0 <a href=" 1%3e0 "></a>`; got != want {
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t.Errorf("got %q want %q", got, want)
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}
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}
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func TestClone(t *testing.T) {
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// The {{.}} will be executed with data "<i>*/" in different contexts.
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// In the t0 template, it will be in a text context.
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// In the t1 template, it will be in a URL context.
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// In the t2 template, it will be in a JavaScript context.
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// In the t3 template, it will be in a CSS context.
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const tmpl = `{{define "a"}}{{template "lhs"}}{{.}}{{template "rhs"}}{{end}}`
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b := new(bytes.Buffer)
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// Create an incomplete template t0.
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t0 := Must(New("t0").Parse(tmpl))
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// Clone t0 as t1.
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t1 := Must(t0.Clone())
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Must(t1.Parse(`{{define "lhs"}} <a href=" {{end}}`))
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Must(t1.Parse(`{{define "rhs"}} "></a> {{end}}`))
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// Execute t1.
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b.Reset()
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if err := t1.ExecuteTemplate(b, "a", "<i>*/"); err != nil {
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t.Fatal(err)
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}
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if got, want := b.String(), ` <a href=" %3ci%3e*/ "></a> `; got != want {
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t.Errorf("t1: got %q want %q", got, want)
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}
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// Clone t0 as t2.
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t2 := Must(t0.Clone())
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Must(t2.Parse(`{{define "lhs"}} <p onclick="javascript: {{end}}`))
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Must(t2.Parse(`{{define "rhs"}} "></p> {{end}}`))
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// Execute t2.
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b.Reset()
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if err := t2.ExecuteTemplate(b, "a", "<i>*/"); err != nil {
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t.Fatal(err)
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}
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if got, want := b.String(), ` <p onclick="javascript: "\u003ci\u003e*/" "></p> `; got != want {
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t.Errorf("t2: got %q want %q", got, want)
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}
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// Clone t0 as t3, but do not execute t3 yet.
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t3 := Must(t0.Clone())
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Must(t3.Parse(`{{define "lhs"}} <style> {{end}}`))
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Must(t3.Parse(`{{define "rhs"}} </style> {{end}}`))
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// Complete t0.
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Must(t0.Parse(`{{define "lhs"}} ( {{end}}`))
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Must(t0.Parse(`{{define "rhs"}} ) {{end}}`))
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// Clone t0 as t4. Redefining the "lhs" template should not fail.
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t4 := Must(t0.Clone())
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if _, err := t4.Parse(`{{define "lhs"}} OK {{end}}`); err != nil {
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t.Errorf(`redefine "lhs": got err %v want nil`, err)
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}
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// Cloning t1 should fail as it has been executed.
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if _, err := t1.Clone(); err == nil {
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t.Error("cloning t1: got nil err want non-nil")
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}
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// Redefining the "lhs" template in t1 should fail as it has been executed.
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if _, err := t1.Parse(`{{define "lhs"}} OK {{end}}`); err == nil {
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t.Error(`redefine "lhs": got nil err want non-nil`)
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}
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// Execute t0.
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b.Reset()
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if err := t0.ExecuteTemplate(b, "a", "<i>*/"); err != nil {
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t.Fatal(err)
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}
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if got, want := b.String(), ` ( <i>*/ ) `; got != want {
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t.Errorf("t0: got %q want %q", got, want)
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}
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// Clone t0. This should fail, as t0 has already executed.
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if _, err := t0.Clone(); err == nil {
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t.Error(`t0.Clone(): got nil err want non-nil`)
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}
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// Similarly, cloning sub-templates should fail.
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if _, err := t0.Lookup("a").Clone(); err == nil {
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t.Error(`t0.Lookup("a").Clone(): got nil err want non-nil`)
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}
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if _, err := t0.Lookup("lhs").Clone(); err == nil {
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t.Error(`t0.Lookup("lhs").Clone(): got nil err want non-nil`)
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}
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// Execute t3.
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b.Reset()
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if err := t3.ExecuteTemplate(b, "a", "<i>*/"); err != nil {
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t.Fatal(err)
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}
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if got, want := b.String(), ` <style> ZgotmplZ </style> `; got != want {
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t.Errorf("t3: got %q want %q", got, want)
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}
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}
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func TestTemplates(t *testing.T) {
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names := []string{"t0", "a", "lhs", "rhs"}
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// Some template definitions borrowed from TestClone.
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const tmpl = `
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{{define "a"}}{{template "lhs"}}{{.}}{{template "rhs"}}{{end}}
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{{define "lhs"}} <a href=" {{end}}
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{{define "rhs"}} "></a> {{end}}`
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t0 := Must(New("t0").Parse(tmpl))
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templates := t0.Templates()
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if len(templates) != len(names) {
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t.Errorf("expected %d templates; got %d", len(names), len(templates))
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}
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for _, name := range names {
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found := false
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for _, tmpl := range templates {
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if name == tmpl.text.Name() {
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found = true
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break
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}
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}
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if !found {
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t.Error("could not find template", name)
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}
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}
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}
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// This used to crash; https://golang.org/issue/3281
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func TestCloneCrash(t *testing.T) {
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t1 := New("all")
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Must(t1.New("t1").Parse(`{{define "foo"}}foo{{end}}`))
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t1.Clone()
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}
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// Ensure that this guarantee from the docs is upheld:
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// "Further calls to Parse in the copy will add templates
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// to the copy but not to the original."
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func TestCloneThenParse(t *testing.T) {
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t0 := Must(New("t0").Parse(`{{define "a"}}{{template "embedded"}}{{end}}`))
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t1 := Must(t0.Clone())
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Must(t1.Parse(`{{define "embedded"}}t1{{end}}`))
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if len(t0.Templates())+1 != len(t1.Templates()) {
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t.Error("adding a template to a clone added it to the original")
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}
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// double check that the embedded template isn't available in the original
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err := t0.ExecuteTemplate(ioutil.Discard, "a", nil)
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if err == nil {
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t.Error("expected 'no such template' error")
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}
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}
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// https://golang.org/issue/5980
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func TestFuncMapWorksAfterClone(t *testing.T) {
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funcs := FuncMap{"customFunc": func() (string, error) {
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return "", errors.New("issue5980")
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}}
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// get the expected error output (no clone)
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uncloned := Must(New("").Funcs(funcs).Parse("{{customFunc}}"))
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wantErr := uncloned.Execute(ioutil.Discard, nil)
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// toClone must be the same as uncloned. It has to be recreated from scratch,
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// since cloning cannot occur after execution.
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toClone := Must(New("").Funcs(funcs).Parse("{{customFunc}}"))
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cloned := Must(toClone.Clone())
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gotErr := cloned.Execute(ioutil.Discard, nil)
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if wantErr.Error() != gotErr.Error() {
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t.Errorf("clone error message mismatch want %q got %q", wantErr, gotErr)
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}
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}
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// https://golang.org/issue/16101
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func TestTemplateCloneExecuteRace(t *testing.T) {
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const (
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input = `<title>{{block "a" .}}a{{end}}</title><body>{{block "b" .}}b{{end}}<body>`
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overlay = `{{define "b"}}A{{end}}`
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)
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outer := Must(New("outer").Parse(input))
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tmpl := Must(Must(outer.Clone()).Parse(overlay))
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var wg sync.WaitGroup
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for i := 0; i < 10; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for i := 0; i < 100; i++ {
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if err := tmpl.Execute(ioutil.Discard, "data"); err != nil {
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panic(err)
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}
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}
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}()
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}
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wg.Wait()
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}
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func TestTemplateCloneLookup(t *testing.T) {
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// Template.escape makes an assumption that the template associated
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// with t.Name() is t. Check that this holds.
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tmpl := Must(New("x").Parse("a"))
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tmpl = Must(tmpl.Clone())
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if tmpl.Lookup(tmpl.Name()) != tmpl {
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t.Error("after Clone, tmpl.Lookup(tmpl.Name()) != tmpl")
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}
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}
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func TestCloneGrowth(t *testing.T) {
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tmpl := Must(New("root").Parse(`<title>{{block "B". }}Arg{{end}}</title>`))
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tmpl = Must(tmpl.Clone())
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Must(tmpl.Parse(`{{define "B"}}Text{{end}}`))
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for i := 0; i < 10; i++ {
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tmpl.Execute(ioutil.Discard, nil)
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}
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if len(tmpl.DefinedTemplates()) > 200 {
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t.Fatalf("too many templates: %v", len(tmpl.DefinedTemplates()))
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}
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}
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// https://golang.org/issue/17735
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func TestCloneRedefinedName(t *testing.T) {
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const base = `
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{{ define "a" -}}<title>{{ template "b" . -}}</title>{{ end -}}
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{{ define "b" }}{{ end -}}
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`
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const page = `{{ template "a" . }}`
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t1 := Must(New("a").Parse(base))
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for i := 0; i < 2; i++ {
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t2 := Must(t1.Clone())
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t2 = Must(t2.New(fmt.Sprintf("%d", i)).Parse(page))
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err := t2.Execute(ioutil.Discard, nil)
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if err != nil {
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t.Fatal(err)
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}
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}
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}
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