src/pkg/exp/template/exec_test.go - go - Git at Google

 // 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"
 	"fmt"
 	"os"
 	"sort"
 	"strings"
 	"testing"
 )

 // T has lots of interesting pieces to use to test execution.
 type T struct {
 	// Basics
 	I           int
 	U16         uint16
 	X           string
 	FloatZero   float64
 	ComplexZero float64
 	// Nested structs.
 	U *U
 	// Slices
 	SI      []int
 	SIEmpty []int
 	SB      []bool
 	// Maps
 	MSI      map[string]int
 	MSIone   map[string]int // one element, for deterministic output
 	MSIEmpty map[string]int
 	SMSI     []map[string]int
 	// Empty interfaces; used to see if we can dig inside one.
 	Empty0 interface{} // nil
 	Empty1 interface{}
 	Empty2 interface{}
 	Empty3 interface{}
 	Empty4 interface{}
 	// Pointers
 	PI  *int
 	PSI *[]int
 	NIL *int
 }

 var tVal = &T{
 	I:      17,
 	U16:    16,
 	X:      "x",
 	U:      &U{"v"},
 	SI:     []int{3, 4, 5},
 	SB:     []bool{true, false},
 	MSI:    map[string]int{"one": 1, "two": 2, "three": 3},
 	MSIone: map[string]int{"one": 1},
 	SMSI: []map[string]int{
 		{"one": 1, "two": 2},
 		{"eleven": 11, "twelve": 12},
 	},
 	Empty1: 3,
 	Empty2: "empty2",
 	Empty3: []int{7, 8},
 	Empty4: &U{"v"},
 	PI:     newInt(23),
 	PSI:    newIntSlice(21, 22, 23),
 }

 // Helpers for creation.
 func newInt(n int) *int {
 	p := new(int)
 	*p = n
 	return p
 }

 func newIntSlice(n ...int) *[]int {
 	p := new([]int)
 	*p = make([]int, len(n))
 	copy(*p, n)
 	return p
 }

 // Simple methods with and without arguments.
 func (t *T) Method0() string {
 	return "resultOfMethod0"
 }

 func (t *T) Method1(a int) int {
 	return a
 }

 func (t *T) Method2(a uint16, b string) string {
 	return fmt.Sprintf("Method2: %d %s", a, b)
 }

 func (t *T) MAdd(a int, b []int) []int {
 	v := make([]int, len(b))
 	for i, x := range b {
 		v[i] = x + a
 	}
 	return v
 }

 // MSort is used to sort map keys for stable output. (Nice trick!)
 func (t *T) MSort(m map[string]int) []string {
 	keys := make([]string, len(m))
 	i := 0
 	for k := range m {
 		keys[i] = k
 		i++
 	}
 	sort.SortStrings(keys)
 	return keys
 }

 // EPERM returns a value and an os.Error according to its argument.
 func (t *T) EPERM(error bool) (bool, os.Error) {
 	if error {
 		return true, os.EPERM
 	}
 	return false, nil
 }

 type U struct {
 	V string
 }

 type execTest struct {
 	name   string
 	input  string
 	output string
 	data   interface{}
 	ok     bool
 }

 var execTests = []execTest{
 	// Trivial cases.
 	{"empty", "", "", nil, true},
 	{"text", "some text", "some text", nil, true},

 	// Fields of structs.
 	{".X", "-{{.X}}-", "-x-", tVal, true},
 	{".U.V", "-{{.U.V}}-", "-v-", tVal, true},

 	// Dots of all kinds to test basic evaluation.
 	{"dot int", "<{{.}}>", "<13>", 13, true},
 	{"dot uint", "<{{.}}>", "<14>", uint(14), true},
 	{"dot float", "<{{.}}>", "<15.1>", 15.1, true},
 	{"dot bool", "<{{.}}>", "<true>", true, true},
 	{"dot complex", "<{{.}}>", "<(16.2-17i)>", 16.2 - 17i, true},
 	{"dot string", "<{{.}}>", "<hello>", "hello", true},
 	{"dot slice", "<{{.}}>", "<[-1 -2 -3]>", []int{-1, -2, -3}, true},
 	{"dot map", "<{{.}}>", "<map[two:22 one:11]>", map[string]int{"one": 11, "two": 22}, true},
 	{"dot struct", "<{{.}}>", "<{7 seven}>", struct {
 		a int
 		b string
 	}{7, "seven"}, true},

 	// Pointers.
 	{"*int", "{{.PI}}", "23", tVal, true},
 	{"*[]int", "{{.PSI}}", "[21 22 23]", tVal, true},
 	{"*[]int[1]", "{{index .PSI 1}}", "22", tVal, true},
 	{"NIL", "{{.NIL}}", "<nil>", tVal, true},

 	// Emtpy interfaces holding values.
 	{"empty nil", "{{.Empty0}}", "<no value>", tVal, true},
 	{"empty with int", "{{.Empty1}}", "3", tVal, true},
 	{"empty with string", "{{.Empty2}}", "empty2", tVal, true},
 	{"empty with slice", "{{.Empty3}}", "[7 8]", tVal, true},
 	{"empty with struct", "{{.Empty4}}", "{v}", tVal, true},

 	// Method calls.
 	{".Method0", "-{{.Method0}}-", "-resultOfMethod0-", tVal, true},
 	{".Method1(1234)", "-{{.Method1 1234}}-", "-1234-", tVal, true},
 	{".Method1(.I)", "-{{.Method1 .I}}-", "-17-", tVal, true},
 	{".Method2(3, .X)", "-{{.Method2 3 .X}}-", "-Method2: 3 x-", tVal, true},
 	{".Method2(.U16, `str`)", "-{{.Method2 .U16 `str`}}-", "-Method2: 16 str-", tVal, true},

 	// Pipelines.
 	{"pipeline", "-{{.Method0 | .Method2 .U16}}-", "-Method2: 16 resultOfMethod0-", tVal, true},

 	// If.
 	{"if true", "{{if true}}TRUE{{end}}", "TRUE", tVal, true},
 	{"if false", "{{if false}}TRUE{{else}}FALSE{{end}}", "FALSE", tVal, true},
 	{"if 1", "{{if 1}}NON-ZERO{{else}}ZERO{{end}}", "NON-ZERO", tVal, true},
 	{"if 0", "{{if 0}}NON-ZERO{{else}}ZERO{{end}}", "ZERO", tVal, true},
 	{"if 1.5", "{{if 1.5}}NON-ZERO{{else}}ZERO{{end}}", "NON-ZERO", tVal, true},
 	{"if 0.0", "{{if .FloatZero}}NON-ZERO{{else}}ZERO{{end}}", "ZERO", tVal, true},
 	{"if 1.5i", "{{if 1.5i}}NON-ZERO{{else}}ZERO{{end}}", "NON-ZERO", tVal, true},
 	{"if 0.0i", "{{if .ComplexZero}}NON-ZERO{{else}}ZERO{{end}}", "ZERO", tVal, true},
 	{"if emptystring", "{{if ``}}NON-EMPTY{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
 	{"if string", "{{if `notempty`}}NON-EMPTY{{else}}EMPTY{{end}}", "NON-EMPTY", tVal, true},
 	{"if emptyslice", "{{if .SIEmpty}}NON-EMPTY{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
 	{"if slice", "{{if .SI}}NON-EMPTY{{else}}EMPTY{{end}}", "NON-EMPTY", tVal, true},
 	{"if emptymap", "{{if .MSIEmpty}}NON-EMPTY{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
 	{"if map", "{{if .MSI}}NON-EMPTY{{else}}EMPTY{{end}}", "NON-EMPTY", tVal, true},

 	// Printf.
 	{"printf", `{{printf "hello, printf"}}`, "hello, printf", tVal, true},
 	{"printf int", `{{printf "%04x" 127}}`, "007f", tVal, true},
 	{"printf float", `{{printf "%g" 3.5}}`, "3.5", tVal, true},
 	{"printf complex", `{{printf "%g" 1+7i}}`, "(1+7i)", tVal, true},
 	{"printf string", `{{printf "%s" "hello"}}`, "hello", tVal, true},
 	{"printf function", `{{printf "%#q" gopher}}`, "`gopher`", tVal, true},
 	{"printf field", `{{printf "%s" .U.V}}`, "v", tVal, true},
 	{"printf method", `{{printf "%s" .Method0}}`, "resultOfMethod0", tVal, true},
 	{"printf lots", `{{printf "%d %s %g %s" 127 "hello" 7-3i .Method0}}`, "127 hello (7-3i) resultOfMethod0", tVal, true},

 	// HTML.
 	{"html", `{{html "<script>alert(\"XSS\");</script>"}}`,
 		"&lt;script&gt;alert(&#34;XSS&#34;);&lt;/script&gt;", nil, true},
 	{"html pipeline", `{{printf "<script>alert(\"XSS\");</script>" | html}}`,
 		"&lt;script&gt;alert(&#34;XSS&#34;);&lt;/script&gt;", nil, true},

 	// JavaScript.
 	{"js", `{{js .}}`, `It\'d be nice.`, `It'd be nice.`, true},

 	// Booleans
 	{"not", "{{not true}} {{not false}}", "false true", nil, true},
 	{"and", "{{and 0 0}} {{and 1 0}} {{and 0 1}} {{and 1 1}}", "false false false true", nil, true},
 	{"or", "{{or 0 0}} {{or 1 0}} {{or 0 1}} {{or 1 1}}", "false true true true", nil, true},
 	{"boolean if", "{{if and true 1 `hi`}}TRUE{{else}}FALSE{{end}}", "TRUE", tVal, true},
 	{"boolean if not", "{{if and true 1 `hi` | not}}TRUE{{else}}FALSE{{end}}", "FALSE", nil, true},

 	// Indexing.
 	{"slice[0]", "{{index .SI 0}}", "3", tVal, true},
 	{"slice[1]", "{{index .SI 1}}", "4", tVal, true},
 	{"slice[HUGE]", "{{index .SI 10}}", "", tVal, false},
 	{"slice[WRONG]", "{{index .SI `hello`}}", "", tVal, false},
 	{"map[one]", "{{index .MSI `one`}}", "1", tVal, true},
 	{"map[two]", "{{index .MSI `two`}}", "2", tVal, true},
 	{"map[NO]", "{{index .MSI `XXX`}}", "", tVal, false},
 	{"map[WRONG]", "{{index .MSI 10}}", "", tVal, false},
 	{"double index", "{{index .SMSI 1 `eleven`}}", "11", tVal, true},

 	// With.
 	{"with true", "{{with true}}{{.}}{{end}}", "true", tVal, true},
 	{"with false", "{{with false}}{{.}}{{else}}FALSE{{end}}", "FALSE", tVal, true},
 	{"with 1", "{{with 1}}{{.}}{{else}}ZERO{{end}}", "1", tVal, true},
 	{"with 0", "{{with 0}}{{.}}{{else}}ZERO{{end}}", "ZERO", tVal, true},
 	{"with 1.5", "{{with 1.5}}{{.}}{{else}}ZERO{{end}}", "1.5", tVal, true},
 	{"with 0.0", "{{with .FloatZero}}{{.}}{{else}}ZERO{{end}}", "ZERO", tVal, true},
 	{"with 1.5i", "{{with 1.5i}}{{.}}{{else}}ZERO{{end}}", "(0+1.5i)", tVal, true},
 	{"with 0.0i", "{{with .ComplexZero}}{{.}}{{else}}ZERO{{end}}", "ZERO", tVal, true},
 	{"with emptystring", "{{with ``}}{{.}}{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
 	{"with string", "{{with `notempty`}}{{.}}{{else}}EMPTY{{end}}", "notempty", tVal, true},
 	{"with emptyslice", "{{with .SIEmpty}}{{.}}{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
 	{"with slice", "{{with .SI}}{{.}}{{else}}EMPTY{{end}}", "[3 4 5]", tVal, true},
 	{"with emptymap", "{{with .MSIEmpty}}{{.}}{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
 	{"with map", "{{with .MSIone}}{{.}}{{else}}EMPTY{{end}}", "map[one:1]", tVal, true},
 	{"with empty interface, struct field", "{{with .Empty4}}{{.V}}{{end}}", "v", tVal, true},

 	// Range.
 	{"range []int", "{{range .SI}}-{{.}}-{{end}}", "-3--4--5-", tVal, true},
 	{"range empty no else", "{{range .SIEmpty}}-{{.}}-{{end}}", "", tVal, true},
 	{"range []int else", "{{range .SI}}-{{.}}-{{else}}EMPTY{{end}}", "-3--4--5-", tVal, true},
 	{"range empty else", "{{range .SIEmpty}}-{{.}}-{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
 	{"range []bool", "{{range .SB}}-{{.}}-{{end}}", "-true--false-", tVal, true},
 	{"range []int method", "{{range .SI | .MAdd .I}}-{{.}}-{{end}}", "-20--21--22-", tVal, true},
 	{"range map", "{{range .MSI | .MSort}}-{{.}}-{{end}}", "-one--three--two-", tVal, true},
 	{"range empty map no else", "{{range .MSIEmpty}}-{{.}}-{{end}}", "", tVal, true},
 	{"range map else", "{{range .MSI | .MSort}}-{{.}}-{{else}}EMPTY{{end}}", "-one--three--two-", tVal, true},
 	{"range empty map else", "{{range .MSIEmpty}}-{{.}}-{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
 	{"range empty interface", "{{range .Empty3}}-{{.}}-{{else}}EMPTY{{end}}", "-7--8-", tVal, true},

 	// Error handling.
 	{"error method, error", "{{.EPERM true}}", "", tVal, false},
 	{"error method, no error", "{{.EPERM false}}", "false", tVal, true},
 }

 func gopher() string {
 	return "gopher"
 }

 func testExecute(execTests []execTest, set *Set, t *testing.T) {
 	b := new(bytes.Buffer)
 	funcs := FuncMap{"gopher": gopher}
 	for _, test := range execTests {
 		tmpl := New(test.name).Funcs(funcs)
 		err := tmpl.Parse(test.input)
 		if err != nil {
 			t.Errorf("%s: parse error: %s", test.name, err)
 			continue
 		}
 		b.Reset()
 		err = tmpl.ExecuteInSet(b, test.data, set)
 		switch {
 		case !test.ok && err == nil:
 			t.Errorf("%s: expected error; got none", test.name)
 			continue
 		case test.ok && err != nil:
 			t.Errorf("%s: unexpected execute error: %s", test.name, err)
 			continue
 		case !test.ok && err != nil:
 			// expected error, got one
 			if *debug {
 				fmt.Printf("%s: %s\n\t%s\n", test.name, test.input, err)
 			}
 		}
 		result := b.String()
 		if result != test.output {
 			t.Errorf("%s: expected\n\t%q\ngot\n\t%q", test.name, test.output, result)
 		}
 	}
 }

 func TestExecute(t *testing.T) {
 	testExecute(execTests, nil, t)
 }

 // Check that an error from a method flows back to the top.
 func TestExecuteError(t *testing.T) {
 	b := new(bytes.Buffer)
 	tmpl := New("error")
 	err := tmpl.Parse("{{.EPERM true}}")
 	if err != nil {
 		t.Fatalf("parse error: %s", err)
 	}
 	err = tmpl.Execute(b, tVal)
 	if err == nil {
 		t.Errorf("expected error; got none")
 	} else if !strings.Contains(err.String(), os.EPERM.String()) {
 		t.Errorf("expected os.EPERM; got %s", err)
 	}
 }

 func TestJSEscaping(t *testing.T) {
 	testCases := []struct {
 		in, exp string
 	}{
 		{`a`, `a`},
 		{`'foo`, `\'foo`},
 		{`Go "jump" \`, `Go \"jump\" \\`},
 		{`Yukihiro says "今日は世界"`, `Yukihiro says \"今日は世界\"`},
 		{"unprintable \uFDFF", `unprintable \uFDFF`},
 	}
 	for _, tc := range testCases {
 		s := JSEscapeString(tc.in)
 		if s != tc.exp {
 			t.Errorf("JS escaping [%s] got [%s] want [%s]", tc.in, s, tc.exp)
 		}
 	}
 }
	// 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"
	"fmt"
	"os"
	"sort"
	"strings"
	"testing"
	)

	// T has lots of interesting pieces to use to test execution.
	type T struct {
	// Basics
	I int
	U16 uint16
	X string
	FloatZero float64
	ComplexZero float64
	// Nested structs.
	U *U
	// Slices
	SI []int
	SIEmpty []int
	SB []bool
	// Maps
	MSI map[string]int
	MSIone map[string]int // one element, for deterministic output
	MSIEmpty map[string]int
	SMSI []map[string]int
	// Empty interfaces; used to see if we can dig inside one.
	Empty0 interface{} // nil
	Empty1 interface{}
	Empty2 interface{}
	Empty3 interface{}
	Empty4 interface{}
	// Pointers
	PI *int
	PSI *[]int
	NIL *int
	}

	var tVal = &T{
	I: 17,
	U16: 16,
	X: "x",
	U: &U{"v"},
	SI: []int{3, 4, 5},
	SB: []bool{true, false},
	MSI: map[string]int{"one": 1, "two": 2, "three": 3},
	MSIone: map[string]int{"one": 1},
	SMSI: []map[string]int{
	{"one": 1, "two": 2},
	{"eleven": 11, "twelve": 12},
	},
	Empty1: 3,
	Empty2: "empty2",
	Empty3: []int{7, 8},
	Empty4: &U{"v"},
	PI: newInt(23),
	PSI: newIntSlice(21, 22, 23),
	}

	// Helpers for creation.
	func newInt(n int) *int {
	p := new(int)
	*p = n
	return p
	}

	func newIntSlice(n ...int) *[]int {
	p := new([]int)
	*p = make([]int, len(n))
	copy(*p, n)
	return p
	}

	// Simple methods with and without arguments.
	func (t *T) Method0() string {
	return "resultOfMethod0"
	}

	func (t *T) Method1(a int) int {
	return a
	}

	func (t *T) Method2(a uint16, b string) string {
	return fmt.Sprintf("Method2: %d %s", a, b)
	}

	func (t *T) MAdd(a int, b []int) []int {
	v := make([]int, len(b))
	for i, x := range b {
	v[i] = x + a
	}
	return v
	}

	// MSort is used to sort map keys for stable output. (Nice trick!)
	func (t *T) MSort(m map[string]int) []string {
	keys := make([]string, len(m))
	i := 0
	for k := range m {
	keys[i] = k
	i++
	}
	sort.SortStrings(keys)
	return keys
	}

	// EPERM returns a value and an os.Error according to its argument.
	func (t *T) EPERM(error bool) (bool, os.Error) {
	if error {
	return true, os.EPERM
	}
	return false, nil
	}

	type U struct {
	V string
	}

	type execTest struct {
	name string
	input string
	output string
	data interface{}
	ok bool
	}

	var execTests = []execTest{
	// Trivial cases.
	{"empty", "", "", nil, true},
	{"text", "some text", "some text", nil, true},

	// Fields of structs.
	{".X", "-{{.X}}-", "-x-", tVal, true},
	{".U.V", "-{{.U.V}}-", "-v-", tVal, true},

	// Dots of all kinds to test basic evaluation.
	{"dot int", "<{{.}}>", "<13>", 13, true},
	{"dot uint", "<{{.}}>", "<14>", uint(14), true},
	{"dot float", "<{{.}}>", "<15.1>", 15.1, true},
	{"dot bool", "<{{.}}>", "<true>", true, true},
	{"dot complex", "<{{.}}>", "<(16.2-17i)>", 16.2 - 17i, true},
	{"dot string", "<{{.}}>", "<hello>", "hello", true},
	{"dot slice", "<{{.}}>", "<[-1 -2 -3]>", []int{-1, -2, -3}, true},
	{"dot map", "<{{.}}>", "<map[two:22 one:11]>", map[string]int{"one": 11, "two": 22}, true},
	{"dot struct", "<{{.}}>", "<{7 seven}>", struct {
	a int
	b string
	}{7, "seven"}, true},

	// Pointers.
	{"*int", "{{.PI}}", "23", tVal, true},
	{"*[]int", "{{.PSI}}", "[21 22 23]", tVal, true},
	{"*[]int[1]", "{{index .PSI 1}}", "22", tVal, true},
	{"NIL", "{{.NIL}}", "<nil>", tVal, true},

	// Emtpy interfaces holding values.
	{"empty nil", "{{.Empty0}}", "<no value>", tVal, true},
	{"empty with int", "{{.Empty1}}", "3", tVal, true},
	{"empty with string", "{{.Empty2}}", "empty2", tVal, true},
	{"empty with slice", "{{.Empty3}}", "[7 8]", tVal, true},
	{"empty with struct", "{{.Empty4}}", "{v}", tVal, true},

	// Method calls.
	{".Method0", "-{{.Method0}}-", "-resultOfMethod0-", tVal, true},
	{".Method1(1234)", "-{{.Method1 1234}}-", "-1234-", tVal, true},
	{".Method1(.I)", "-{{.Method1 .I}}-", "-17-", tVal, true},
	{".Method2(3, .X)", "-{{.Method2 3 .X}}-", "-Method2: 3 x-", tVal, true},
	{".Method2(.U16, `str`)", "-{{.Method2 .U16 `str`}}-", "-Method2: 16 str-", tVal, true},

	// Pipelines.
	{"pipeline", "-{{.Method0 \| .Method2 .U16}}-", "-Method2: 16 resultOfMethod0-", tVal, true},

	// If.
	{"if true", "{{if true}}TRUE{{end}}", "TRUE", tVal, true},
	{"if false", "{{if false}}TRUE{{else}}FALSE{{end}}", "FALSE", tVal, true},
	{"if 1", "{{if 1}}NON-ZERO{{else}}ZERO{{end}}", "NON-ZERO", tVal, true},
	{"if 0", "{{if 0}}NON-ZERO{{else}}ZERO{{end}}", "ZERO", tVal, true},
	{"if 1.5", "{{if 1.5}}NON-ZERO{{else}}ZERO{{end}}", "NON-ZERO", tVal, true},
	{"if 0.0", "{{if .FloatZero}}NON-ZERO{{else}}ZERO{{end}}", "ZERO", tVal, true},
	{"if 1.5i", "{{if 1.5i}}NON-ZERO{{else}}ZERO{{end}}", "NON-ZERO", tVal, true},
	{"if 0.0i", "{{if .ComplexZero}}NON-ZERO{{else}}ZERO{{end}}", "ZERO", tVal, true},
	{"if emptystring", "{{if ``}}NON-EMPTY{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
	{"if string", "{{if `notempty`}}NON-EMPTY{{else}}EMPTY{{end}}", "NON-EMPTY", tVal, true},
	{"if emptyslice", "{{if .SIEmpty}}NON-EMPTY{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
	{"if slice", "{{if .SI}}NON-EMPTY{{else}}EMPTY{{end}}", "NON-EMPTY", tVal, true},
	{"if emptymap", "{{if .MSIEmpty}}NON-EMPTY{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
	{"if map", "{{if .MSI}}NON-EMPTY{{else}}EMPTY{{end}}", "NON-EMPTY", tVal, true},

	// Printf.
	{"printf", `{{printf "hello, printf"}}`, "hello, printf", tVal, true},
	{"printf int", `{{printf "%04x" 127}}`, "007f", tVal, true},
	{"printf float", `{{printf "%g" 3.5}}`, "3.5", tVal, true},
	{"printf complex", `{{printf "%g" 1+7i}}`, "(1+7i)", tVal, true},
	{"printf string", `{{printf "%s" "hello"}}`, "hello", tVal, true},
	{"printf function", `{{printf "%#q" gopher}}`, "`gopher`", tVal, true},
	{"printf field", `{{printf "%s" .U.V}}`, "v", tVal, true},
	{"printf method", `{{printf "%s" .Method0}}`, "resultOfMethod0", tVal, true},
	{"printf lots", `{{printf "%d %s %g %s" 127 "hello" 7-3i .Method0}}`, "127 hello (7-3i) resultOfMethod0", tVal, true},

	// HTML.
	{"html", `{{html "<script>alert(\"XSS\");</script>"}}`,
	"<script>alert("XSS");</script>", nil, true},
	{"html pipeline", `{{printf "<script>alert(\"XSS\");</script>" \| html}}`,
	"<script>alert("XSS");</script>", nil, true},

	// JavaScript.
	{"js", `{{js .}}`, `It\'d be nice.`, `It'd be nice.`, true},

	// Booleans
	{"not", "{{not true}} {{not false}}", "false true", nil, true},
	{"and", "{{and 0 0}} {{and 1 0}} {{and 0 1}} {{and 1 1}}", "false false false true", nil, true},
	{"or", "{{or 0 0}} {{or 1 0}} {{or 0 1}} {{or 1 1}}", "false true true true", nil, true},
	{"boolean if", "{{if and true 1 `hi`}}TRUE{{else}}FALSE{{end}}", "TRUE", tVal, true},
	{"boolean if not", "{{if and true 1 `hi` \| not}}TRUE{{else}}FALSE{{end}}", "FALSE", nil, true},

	// Indexing.
	{"slice[0]", "{{index .SI 0}}", "3", tVal, true},
	{"slice[1]", "{{index .SI 1}}", "4", tVal, true},
	{"slice[HUGE]", "{{index .SI 10}}", "", tVal, false},
	{"slice[WRONG]", "{{index .SI `hello`}}", "", tVal, false},
	{"map[one]", "{{index .MSI `one`}}", "1", tVal, true},
	{"map[two]", "{{index .MSI `two`}}", "2", tVal, true},
	{"map[NO]", "{{index .MSI `XXX`}}", "", tVal, false},
	{"map[WRONG]", "{{index .MSI 10}}", "", tVal, false},
	{"double index", "{{index .SMSI 1 `eleven`}}", "11", tVal, true},

	// With.
	{"with true", "{{with true}}{{.}}{{end}}", "true", tVal, true},
	{"with false", "{{with false}}{{.}}{{else}}FALSE{{end}}", "FALSE", tVal, true},
	{"with 1", "{{with 1}}{{.}}{{else}}ZERO{{end}}", "1", tVal, true},
	{"with 0", "{{with 0}}{{.}}{{else}}ZERO{{end}}", "ZERO", tVal, true},
	{"with 1.5", "{{with 1.5}}{{.}}{{else}}ZERO{{end}}", "1.5", tVal, true},
	{"with 0.0", "{{with .FloatZero}}{{.}}{{else}}ZERO{{end}}", "ZERO", tVal, true},
	{"with 1.5i", "{{with 1.5i}}{{.}}{{else}}ZERO{{end}}", "(0+1.5i)", tVal, true},
	{"with 0.0i", "{{with .ComplexZero}}{{.}}{{else}}ZERO{{end}}", "ZERO", tVal, true},
	{"with emptystring", "{{with ``}}{{.}}{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
	{"with string", "{{with `notempty`}}{{.}}{{else}}EMPTY{{end}}", "notempty", tVal, true},
	{"with emptyslice", "{{with .SIEmpty}}{{.}}{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
	{"with slice", "{{with .SI}}{{.}}{{else}}EMPTY{{end}}", "[3 4 5]", tVal, true},
	{"with emptymap", "{{with .MSIEmpty}}{{.}}{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
	{"with map", "{{with .MSIone}}{{.}}{{else}}EMPTY{{end}}", "map[one:1]", tVal, true},
	{"with empty interface, struct field", "{{with .Empty4}}{{.V}}{{end}}", "v", tVal, true},

	// Range.
	{"range []int", "{{range .SI}}-{{.}}-{{end}}", "-3--4--5-", tVal, true},
	{"range empty no else", "{{range .SIEmpty}}-{{.}}-{{end}}", "", tVal, true},
	{"range []int else", "{{range .SI}}-{{.}}-{{else}}EMPTY{{end}}", "-3--4--5-", tVal, true},
	{"range empty else", "{{range .SIEmpty}}-{{.}}-{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
	{"range []bool", "{{range .SB}}-{{.}}-{{end}}", "-true--false-", tVal, true},
	{"range []int method", "{{range .SI \| .MAdd .I}}-{{.}}-{{end}}", "-20--21--22-", tVal, true},
	{"range map", "{{range .MSI \| .MSort}}-{{.}}-{{end}}", "-one--three--two-", tVal, true},
	{"range empty map no else", "{{range .MSIEmpty}}-{{.}}-{{end}}", "", tVal, true},
	{"range map else", "{{range .MSI \| .MSort}}-{{.}}-{{else}}EMPTY{{end}}", "-one--three--two-", tVal, true},
	{"range empty map else", "{{range .MSIEmpty}}-{{.}}-{{else}}EMPTY{{end}}", "EMPTY", tVal, true},
	{"range empty interface", "{{range .Empty3}}-{{.}}-{{else}}EMPTY{{end}}", "-7--8-", tVal, true},

	// Error handling.
	{"error method, error", "{{.EPERM true}}", "", tVal, false},
	{"error method, no error", "{{.EPERM false}}", "false", tVal, true},
	}

	func gopher() string {
	return "gopher"
	}

	func testExecute(execTests []execTest, set Set, t testing.T) {
	b := new(bytes.Buffer)
	funcs := FuncMap{"gopher": gopher}
	for _, test := range execTests {
	tmpl := New(test.name).Funcs(funcs)
	err := tmpl.Parse(test.input)
	if err != nil {
	t.Errorf("%s: parse error: %s", test.name, err)
	continue
	}
	b.Reset()
	err = tmpl.ExecuteInSet(b, test.data, set)
	switch {
	case !test.ok && err == nil:
	t.Errorf("%s: expected error; got none", test.name)
	continue
	case test.ok && err != nil:
	t.Errorf("%s: unexpected execute error: %s", test.name, err)
	continue
	case !test.ok && err != nil:
	// expected error, got one
	if *debug {
	fmt.Printf("%s: %s\n\t%s\n", test.name, test.input, err)
	}
	}
	result := b.String()
	if result != test.output {
	t.Errorf("%s: expected\n\t%q\ngot\n\t%q", test.name, test.output, result)
	}
	}
	}

	func TestExecute(t *testing.T) {
	testExecute(execTests, nil, t)
	}

	// Check that an error from a method flows back to the top.
	func TestExecuteError(t *testing.T) {
	b := new(bytes.Buffer)
	tmpl := New("error")
	err := tmpl.Parse("{{.EPERM true}}")
	if err != nil {
	t.Fatalf("parse error: %s", err)
	}
	err = tmpl.Execute(b, tVal)
	if err == nil {
	t.Errorf("expected error; got none")
	} else if !strings.Contains(err.String(), os.EPERM.String()) {
	t.Errorf("expected os.EPERM; got %s", err)
	}
	}

	func TestJSEscaping(t *testing.T) {
	testCases := []struct {
	in, exp string
	}{
	{`a`, `a`},
	{`'foo`, `\'foo`},
	{`Go "jump" \`, `Go \"jump\" \\`},
	{`Yukihiro says "今日は世界"`, `Yukihiro says \"今日は世界\"`},
	{"unprintable \uFDFF", `unprintable \uFDFF`},
	}
	for _, tc := range testCases {
	s := JSEscapeString(tc.in)
	if s != tc.exp {
	t.Errorf("JS escaping [%s] got [%s] want [%s]", tc.in, s, tc.exp)
	}
	}
	}