mirror of
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281 lines
7.2 KiB
Go
281 lines
7.2 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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// Tests for mulitple-template parsing and execution.
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import (
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"bytes"
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"fmt"
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"strings"
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"testing"
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"text/template/parse"
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)
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const (
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noError = true
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hasError = false
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)
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type multiParseTest struct {
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name string
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input string
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ok bool
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names []string
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results []string
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}
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var multiParseTests = []multiParseTest{
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{"empty", "", noError,
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nil,
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nil},
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{"one", `{{define "foo"}} FOO {{end}}`, noError,
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[]string{"foo"},
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[]string{" FOO "}},
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{"two", `{{define "foo"}} FOO {{end}}{{define "bar"}} BAR {{end}}`, noError,
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[]string{"foo", "bar"},
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[]string{" FOO ", " BAR "}},
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// errors
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{"missing end", `{{define "foo"}} FOO `, hasError,
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nil,
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nil},
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{"malformed name", `{{define "foo}} FOO `, hasError,
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nil,
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nil},
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}
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func TestMultiParse(t *testing.T) {
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for _, test := range multiParseTests {
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template, err := New("root").Parse(test.input)
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switch {
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case err == nil && !test.ok:
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t.Errorf("%q: expected error; got none", test.name)
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continue
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case err != nil && test.ok:
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t.Errorf("%q: unexpected error: %v", test.name, err)
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continue
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case err != nil && !test.ok:
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// expected error, got one
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if *debug {
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fmt.Printf("%s: %s\n\t%s\n", test.name, test.input, err)
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}
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continue
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}
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if template == nil {
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continue
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}
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if len(template.tmpl) != len(test.names)+1 { // +1 for root
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t.Errorf("%s: wrong number of templates; wanted %d got %d", test.name, len(test.names), len(template.tmpl))
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continue
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}
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for i, name := range test.names {
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tmpl, ok := template.tmpl[name]
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if !ok {
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t.Errorf("%s: can't find template %q", test.name, name)
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continue
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}
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result := tmpl.Root.String()
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if result != test.results[i] {
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t.Errorf("%s=(%q): got\n\t%v\nexpected\n\t%v", test.name, test.input, result, test.results[i])
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}
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}
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}
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}
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var multiExecTests = []execTest{
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{"empty", "", "", nil, true},
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{"text", "some text", "some text", nil, true},
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{"invoke x", `{{template "x" .SI}}`, "TEXT", tVal, true},
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{"invoke x no args", `{{template "x"}}`, "TEXT", tVal, true},
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{"invoke dot int", `{{template "dot" .I}}`, "17", tVal, true},
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{"invoke dot []int", `{{template "dot" .SI}}`, "[3 4 5]", tVal, true},
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{"invoke dotV", `{{template "dotV" .U}}`, "v", tVal, true},
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{"invoke nested int", `{{template "nested" .I}}`, "17", tVal, true},
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{"variable declared by template", `{{template "nested" $x:=.SI}},{{index $x 1}}`, "[3 4 5],4", tVal, true},
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// User-defined function: test argument evaluator.
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{"testFunc literal", `{{oneArg "joe"}}`, "oneArg=joe", tVal, true},
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{"testFunc .", `{{oneArg .}}`, "oneArg=joe", "joe", true},
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}
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// These strings are also in testdata/*.
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const multiText1 = `
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{{define "x"}}TEXT{{end}}
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{{define "dotV"}}{{.V}}{{end}}
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`
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const multiText2 = `
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{{define "dot"}}{{.}}{{end}}
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{{define "nested"}}{{template "dot" .}}{{end}}
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`
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func TestMultiExecute(t *testing.T) {
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// Declare a couple of templates first.
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template, err := New("root").Parse(multiText1)
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if err != nil {
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t.Fatalf("parse error for 1: %s", err)
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}
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_, err = template.Parse(multiText2)
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if err != nil {
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t.Fatalf("parse error for 2: %s", err)
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}
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testExecute(multiExecTests, template, t)
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}
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func TestParseFiles(t *testing.T) {
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_, err := ParseFiles("DOES NOT EXIST")
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if err == nil {
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t.Error("expected error for non-existent file; got none")
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}
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template := New("root")
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_, err = template.ParseFiles("testdata/file1.tmpl", "testdata/file2.tmpl")
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if err != nil {
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t.Fatalf("error parsing files: %v", err)
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}
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testExecute(multiExecTests, template, t)
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}
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func TestParseGlob(t *testing.T) {
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_, err := ParseGlob("DOES NOT EXIST")
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if err == nil {
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t.Error("expected error for non-existent file; got none")
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}
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_, err = New("error").ParseGlob("[x")
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if err == nil {
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t.Error("expected error for bad pattern; got none")
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}
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template := New("root")
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_, err = template.ParseGlob("testdata/file*.tmpl")
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if err != nil {
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t.Fatalf("error parsing files: %v", err)
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}
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testExecute(multiExecTests, template, t)
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}
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// In these tests, actual content (not just template definitions) comes from the parsed files.
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var templateFileExecTests = []execTest{
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{"test", `{{template "tmpl1.tmpl"}}{{template "tmpl2.tmpl"}}`, "template1\n\ny\ntemplate2\n\nx\n", 0, true},
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}
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func TestParseFilesWithData(t *testing.T) {
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template, err := New("root").ParseFiles("testdata/tmpl1.tmpl", "testdata/tmpl2.tmpl")
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if err != nil {
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t.Fatalf("error parsing files: %v", err)
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}
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testExecute(templateFileExecTests, template, t)
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}
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func TestParseGlobWithData(t *testing.T) {
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template, err := New("root").ParseGlob("testdata/tmpl*.tmpl")
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if err != nil {
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t.Fatalf("error parsing files: %v", err)
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}
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testExecute(templateFileExecTests, template, t)
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}
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const (
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cloneText1 = `{{define "a"}}{{template "b"}}{{template "c"}}{{end}}`
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cloneText2 = `{{define "b"}}b{{end}}`
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cloneText3 = `{{define "c"}}root{{end}}`
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cloneText4 = `{{define "c"}}clone{{end}}`
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)
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func TestClone(t *testing.T) {
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// Create some templates and clone the root.
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root, err := New("root").Parse(cloneText1)
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if err != nil {
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t.Fatal(err)
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}
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_, err = root.Parse(cloneText2)
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if err != nil {
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t.Fatal(err)
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}
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clone := Must(root.Clone())
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// Add variants to both.
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_, err = root.Parse(cloneText3)
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if err != nil {
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t.Fatal(err)
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}
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_, err = clone.Parse(cloneText4)
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if err != nil {
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t.Fatal(err)
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}
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// Verify that the clone is self-consistent.
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for k, v := range clone.tmpl {
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if k == clone.name && v.tmpl[k] != clone {
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t.Error("clone does not contain root")
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}
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if v != v.tmpl[v.name] {
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t.Errorf("clone does not contain self for %q", k)
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}
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}
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// Execute root.
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var b bytes.Buffer
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err = root.ExecuteTemplate(&b, "a", 0)
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if err != nil {
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t.Fatal(err)
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}
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if b.String() != "broot" {
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t.Errorf("expected %q got %q", "broot", b.String())
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}
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// Execute copy.
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b.Reset()
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err = clone.ExecuteTemplate(&b, "a", 0)
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if err != nil {
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t.Fatal(err)
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}
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if b.String() != "bclone" {
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t.Errorf("expected %q got %q", "bclone", b.String())
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}
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}
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func TestAddParseTree(t *testing.T) {
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// Create some templates.
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root, err := New("root").Parse(cloneText1)
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if err != nil {
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t.Fatal(err)
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}
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_, err = root.Parse(cloneText2)
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if err != nil {
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t.Fatal(err)
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}
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// Add a new parse tree.
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tree, err := parse.Parse("cloneText3", cloneText3, "", "", nil, builtins)
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if err != nil {
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t.Fatal(err)
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}
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added, err := root.AddParseTree("c", tree["c"])
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// Execute.
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var b bytes.Buffer
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err = added.ExecuteTemplate(&b, "a", 0)
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if err != nil {
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t.Fatal(err)
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}
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if b.String() != "broot" {
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t.Errorf("expected %q got %q", "broot", b.String())
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}
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}
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func TestRedefinition(t *testing.T) {
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var tmpl *Template
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var err error
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if tmpl, err = New("tmpl1").Parse(`{{define "test"}}foo{{end}}`); err != nil {
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t.Fatalf("parse 1: %v", err)
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}
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if _, err = tmpl.Parse(`{{define "test"}}bar{{end}}`); err == nil {
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t.Fatal("expected error")
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}
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if !strings.Contains(err.Error(), "redefinition") {
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t.Fatalf("expected redefinition error; got %v", err)
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}
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if _, err = tmpl.New("tmpl2").Parse(`{{define "test"}}bar{{end}}`); err == nil {
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t.Fatal("expected error")
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}
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if !strings.Contains(err.Error(), "redefinition") {
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t.Fatalf("expected redefinition error; got %v", err)
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}
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}
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