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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package template
import (
"bytes"
"testing"
"text/template/parse"
)
func TestAddParseTree(t *testing.T) {
root := Must(New("root").Parse(`{{define "a"}} {{.}} {{template "b"}} {{.}} "></a>{{end}}`))
tree, err := parse.Parse("t", `{{define "b"}}<a href="{{end}}`, "", "", nil, nil)
if err != nil {
t.Fatal(err)
}
added := Must(root.AddParseTree("b", tree["b"]))
b := new(bytes.Buffer)
err = added.ExecuteTemplate(b, "a", "1>0")
if err != nil {
t.Fatal(err)
}
if got, want := b.String(), ` 1>0 <a href=" 1%3e0 "></a>`; got != want {
t.Errorf("got %q want %q", got, want)
}
}
func TestClone(t *testing.T) {
// The {{.}} will be executed with data "<i>*/" in different contexts.
// In the t0 template, it will be in a text context.
// In the t1 template, it will be in a URL context.
// In the t2 template, it will be in a JavaScript context.
// In the t3 template, it will be in a CSS context.
const tmpl = `{{define "a"}}{{template "lhs"}}{{.}}{{template "rhs"}}{{end}}`
b := new(bytes.Buffer)
// Create an incomplete template t0.
t0 := Must(New("t0").Parse(tmpl))
// Clone t0 as t1.
t1 := Must(t0.Clone())
Must(t1.Parse(`{{define "lhs"}} <a href=" {{end}}`))
Must(t1.Parse(`{{define "rhs"}} "></a> {{end}}`))
// Execute t1.
b.Reset()
if err := t1.ExecuteTemplate(b, "a", "<i>*/"); err != nil {
t.Fatal(err)
}
if got, want := b.String(), ` <a href=" %3ci%3e*/ "></a> `; got != want {
t.Errorf("t1: got %q want %q", got, want)
}
// Clone t0 as t2.
t2 := Must(t0.Clone())
Must(t2.Parse(`{{define "lhs"}} <p onclick="javascript: {{end}}`))
Must(t2.Parse(`{{define "rhs"}} "></p> {{end}}`))
// Execute t2.
b.Reset()
if err := t2.ExecuteTemplate(b, "a", "<i>*/"); err != nil {
t.Fatal(err)
}
if got, want := b.String(), ` <p onclick="javascript: "\u003ci\u003e*/" "></p> `; got != want {
t.Errorf("t2: got %q want %q", got, want)
}
// Clone t0 as t3, but do not execute t3 yet.
t3 := Must(t0.Clone())
Must(t3.Parse(`{{define "lhs"}} <style> {{end}}`))
Must(t3.Parse(`{{define "rhs"}} </style> {{end}}`))
// Complete t0.
Must(t0.Parse(`{{define "lhs"}} ( {{end}}`))
Must(t0.Parse(`{{define "rhs"}} ) {{end}}`))
// Clone t0 as t4. Redefining the "lhs" template should fail.
t4 := Must(t0.Clone())
if _, err := t4.Parse(`{{define "lhs"}} FAIL {{end}}`); err == nil {
t.Error(`redefine "lhs": got nil err want non-nil`)
}
// Execute t0.
b.Reset()
if err := t0.ExecuteTemplate(b, "a", "<i>*/"); err != nil {
t.Fatal(err)
}
if got, want := b.String(), ` ( <i>*/ ) `; got != want {
t.Errorf("t0: got %q want %q", got, want)
}
// Clone t0. This should fail, as t0 has already executed.
if _, err := t0.Clone(); err == nil {
t.Error(`t0.Clone(): got nil err want non-nil`)
}
// Similarly, cloning sub-templates should fail.
if _, err := t0.Lookup("a").Clone(); err == nil {
t.Error(`t0.Lookup("a").Clone(): got nil err want non-nil`)
}
if _, err := t0.Lookup("lhs").Clone(); err == nil {
t.Error(`t0.Lookup("lhs").Clone(): got nil err want non-nil`)
}
// Execute t3.
b.Reset()
if err := t3.ExecuteTemplate(b, "a", "<i>*/"); err != nil {
t.Fatal(err)
}
if got, want := b.String(), ` <style> ZgotmplZ </style> `; got != want {
t.Errorf("t3: got %q want %q", got, want)
}
}
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