| // Copyright 2016 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_test |
| |
| import ( |
| "bytes" |
| . "html/template" |
| "strings" |
| "testing" |
| ) |
| |
| func TestTemplateClone(t *testing.T) { |
| // https://golang.org/issue/12996 |
| orig := New("name") |
| clone, err := orig.Clone() |
| if err != nil { |
| t.Fatal(err) |
| } |
| if len(clone.Templates()) != len(orig.Templates()) { |
| t.Fatalf("Invalid length of t.Clone().Templates()") |
| } |
| |
| const want = "stuff" |
| parsed := Must(clone.Parse(want)) |
| var buf bytes.Buffer |
| err = parsed.Execute(&buf, nil) |
| if err != nil { |
| t.Fatal(err) |
| } |
| if got := buf.String(); got != want { |
| t.Fatalf("got %q; want %q", got, want) |
| } |
| } |
| |
| func TestRedefineNonEmptyAfterExecution(t *testing.T) { |
| c := newTestCase(t) |
| c.mustParse(c.root, `foo`) |
| c.mustExecute(c.root, nil, "foo") |
| c.mustNotParse(c.root, `bar`) |
| } |
| |
| func TestRedefineEmptyAfterExecution(t *testing.T) { |
| c := newTestCase(t) |
| c.mustParse(c.root, ``) |
| c.mustExecute(c.root, nil, "") |
| c.mustNotParse(c.root, `foo`) |
| c.mustExecute(c.root, nil, "") |
| } |
| |
| func TestRedefineAfterNonExecution(t *testing.T) { |
| c := newTestCase(t) |
| c.mustParse(c.root, `{{if .}}<{{template "X"}}>{{end}}{{define "X"}}foo{{end}}`) |
| c.mustExecute(c.root, 0, "") |
| c.mustNotParse(c.root, `{{define "X"}}bar{{end}}`) |
| c.mustExecute(c.root, 1, "<foo>") |
| } |
| |
| func TestRedefineAfterNamedExecution(t *testing.T) { |
| c := newTestCase(t) |
| c.mustParse(c.root, `<{{template "X" .}}>{{define "X"}}foo{{end}}`) |
| c.mustExecute(c.root, nil, "<foo>") |
| c.mustNotParse(c.root, `{{define "X"}}bar{{end}}`) |
| c.mustExecute(c.root, nil, "<foo>") |
| } |
| |
| func TestRedefineNestedByNameAfterExecution(t *testing.T) { |
| c := newTestCase(t) |
| c.mustParse(c.root, `{{define "X"}}foo{{end}}`) |
| c.mustExecute(c.lookup("X"), nil, "foo") |
| c.mustNotParse(c.root, `{{define "X"}}bar{{end}}`) |
| c.mustExecute(c.lookup("X"), nil, "foo") |
| } |
| |
| func TestRedefineNestedByTemplateAfterExecution(t *testing.T) { |
| c := newTestCase(t) |
| c.mustParse(c.root, `{{define "X"}}foo{{end}}`) |
| c.mustExecute(c.lookup("X"), nil, "foo") |
| c.mustNotParse(c.lookup("X"), `bar`) |
| c.mustExecute(c.lookup("X"), nil, "foo") |
| } |
| |
| func TestRedefineSafety(t *testing.T) { |
| c := newTestCase(t) |
| c.mustParse(c.root, `<html><a href="{{template "X"}}">{{define "X"}}{{end}}`) |
| c.mustExecute(c.root, nil, `<html><a href="">`) |
| // Note: Every version of Go prior to Go 1.8 accepted the redefinition of "X" |
| // on the next line, but luckily kept it from being used in the outer template. |
| // Now we reject it, which makes clearer that we're not going to use it. |
| c.mustNotParse(c.root, `{{define "X"}}" bar="baz{{end}}`) |
| c.mustExecute(c.root, nil, `<html><a href="">`) |
| } |
| |
| func TestRedefineTopUse(t *testing.T) { |
| c := newTestCase(t) |
| c.mustParse(c.root, `{{template "X"}}{{.}}{{define "X"}}{{end}}`) |
| c.mustExecute(c.root, 42, `42`) |
| c.mustNotParse(c.root, `{{define "X"}}<script>{{end}}`) |
| c.mustExecute(c.root, 42, `42`) |
| } |
| |
| func TestRedefineOtherParsers(t *testing.T) { |
| c := newTestCase(t) |
| c.mustParse(c.root, ``) |
| c.mustExecute(c.root, nil, ``) |
| if _, err := c.root.ParseFiles("no.template"); err == nil || !strings.Contains(err.Error(), "Execute") { |
| t.Errorf("ParseFiles: %v\nwanted error about already having Executed", err) |
| } |
| if _, err := c.root.ParseGlob("*.no.template"); err == nil || !strings.Contains(err.Error(), "Execute") { |
| t.Errorf("ParseGlob: %v\nwanted error about already having Executed", err) |
| } |
| if _, err := c.root.AddParseTree("t1", c.root.Tree); err == nil || !strings.Contains(err.Error(), "Execute") { |
| t.Errorf("AddParseTree: %v\nwanted error about already having Executed", err) |
| } |
| } |
| |
| type testCase struct { |
| t *testing.T |
| root *Template |
| } |
| |
| func newTestCase(t *testing.T) *testCase { |
| return &testCase{ |
| t: t, |
| root: New("root"), |
| } |
| } |
| |
| func (c *testCase) lookup(name string) *Template { |
| return c.root.Lookup(name) |
| } |
| |
| func (c *testCase) mustParse(t *Template, text string) { |
| _, err := t.Parse(text) |
| if err != nil { |
| c.t.Fatalf("parse: %v", err) |
| } |
| } |
| |
| func (c *testCase) mustNotParse(t *Template, text string) { |
| _, err := t.Parse(text) |
| if err == nil { |
| c.t.Fatalf("parse: unexpected success") |
| } |
| } |
| |
| func (c *testCase) mustExecute(t *Template, val interface{}, want string) { |
| var buf bytes.Buffer |
| err := t.Execute(&buf, val) |
| if err != nil { |
| c.t.Fatalf("execute: %v", err) |
| } |
| if buf.String() != want { |
| c.t.Fatalf("template output:\n%s\nwant:\n%s", buf.String(), want) |
| } |
| } |
