blob: fe279a4d16fcd7796c94b22cbc4a38dc42709f0e [file] [log] [blame]
// Copyright 2009 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"
"container/vector"
"fmt"
"io"
"strings"
"testing"
)
type Test struct {
in, out, err string
}
type T struct {
item string
value string
}
type U struct {
mp map[string]int
}
type S struct {
header string
integer int
raw string
innerT T
innerPointerT *T
data []T
pdata []*T
empty []*T
emptystring string
null []*T
vec *vector.Vector
true bool
false bool
mp map[string]string
innermap U
stringmap map[string]string
bytes []byte
iface interface{}
}
func (s *S) pointerMethod() string { return "ptrmethod!" }
func (s S) valueMethod() string { return "valmethod!" }
var t1 = T{"ItemNumber1", "ValueNumber1"}
var t2 = T{"ItemNumber2", "ValueNumber2"}
func uppercase(v interface{}) string {
s := v.(string)
t := ""
for i := 0; i < len(s); i++ {
c := s[i]
if 'a' <= c && c <= 'z' {
c = c + 'A' - 'a'
}
t += string(c)
}
return t
}
func plus1(v interface{}) string {
i := v.(int)
return fmt.Sprint(i + 1)
}
func writer(f func(interface{}) string) (func(io.Writer, interface{}, string)) {
return func(w io.Writer, v interface{}, format string) {
io.WriteString(w, f(v))
}
}
var formatters = FormatterMap{
"uppercase": writer(uppercase),
"+1": writer(plus1),
}
var tests = []*Test{
// Simple
&Test{"", "", ""},
&Test{"abc", "abc", ""},
&Test{"abc\ndef\n", "abc\ndef\n", ""},
&Test{" {.meta-left} \n", "{", ""},
&Test{" {.meta-right} \n", "}", ""},
&Test{" {.space} \n", " ", ""},
&Test{" {.tab} \n", "\t", ""},
&Test{" {#comment} \n", "", ""},
// Variables at top level
&Test{
in: "{header}={integer}\n",
out: "Header=77\n",
},
// Method at top level
&Test{
in: "ptrmethod={pointerMethod}\n",
out: "ptrmethod=ptrmethod!\n",
},
&Test{
in: "valmethod={valueMethod}\n",
out: "valmethod=valmethod!\n",
},
// Section
&Test{
in: "{.section data }\n" +
"some text for the section\n" +
"{.end}\n",
out: "some text for the section\n",
},
&Test{
in: "{.section data }\n" +
"{header}={integer}\n" +
"{.end}\n",
out: "Header=77\n",
},
&Test{
in: "{.section pdata }\n" +
"{header}={integer}\n" +
"{.end}\n",
out: "Header=77\n",
},
&Test{
in: "{.section pdata }\n" +
"data present\n" +
"{.or}\n" +
"data not present\n" +
"{.end}\n",
out: "data present\n",
},
&Test{
in: "{.section empty }\n" +
"data present\n" +
"{.or}\n" +
"data not present\n" +
"{.end}\n",
out: "data not present\n",
},
&Test{
in: "{.section null }\n" +
"data present\n" +
"{.or}\n" +
"data not present\n" +
"{.end}\n",
out: "data not present\n",
},
&Test{
in: "{.section pdata }\n" +
"{header}={integer}\n" +
"{.section @ }\n" +
"{header}={integer}\n" +
"{.end}\n" +
"{.end}\n",
out: "Header=77\n" +
"Header=77\n",
},
&Test{
in: "{.section data}{.end} {header}\n",
out: " Header\n",
},
// Repeated
&Test{
in: "{.section pdata }\n" +
"{.repeated section @ }\n" +
"{item}={value}\n" +
"{.end}\n" +
"{.end}\n",
out: "ItemNumber1=ValueNumber1\n" +
"ItemNumber2=ValueNumber2\n",
},
&Test{
in: "{.section pdata }\n" +
"{.repeated section @ }\n" +
"{item}={value}\n" +
"{.or}\n" +
"this should not appear\n" +
"{.end}\n" +
"{.end}\n",
out: "ItemNumber1=ValueNumber1\n" +
"ItemNumber2=ValueNumber2\n",
},
&Test{
in: "{.section @ }\n" +
"{.repeated section empty }\n" +
"{item}={value}\n" +
"{.or}\n" +
"this should appear: empty field\n" +
"{.end}\n" +
"{.end}\n",
out: "this should appear: empty field\n",
},
&Test{
in: "{.repeated section pdata }\n" +
"{item}\n" +
"{.alternates with}\n" +
"is\nover\nmultiple\nlines\n" +
"{.end}\n",
out: "ItemNumber1\n" +
"is\nover\nmultiple\nlines\n" +
"ItemNumber2\n",
},
&Test{
in: "{.repeated section pdata }\n" +
"{item}\n" +
"{.alternates with}\n" +
"is\nover\nmultiple\nlines\n" +
" {.end}\n",
out: "ItemNumber1\n" +
"is\nover\nmultiple\nlines\n" +
"ItemNumber2\n",
},
&Test{
in: "{.section pdata }\n" +
"{.repeated section @ }\n" +
"{item}={value}\n" +
"{.alternates with}DIVIDER\n" +
"{.or}\n" +
"this should not appear\n" +
"{.end}\n" +
"{.end}\n",
out: "ItemNumber1=ValueNumber1\n" +
"DIVIDER\n" +
"ItemNumber2=ValueNumber2\n",
},
&Test{
in: "{.repeated section vec }\n" +
"{@}\n" +
"{.end}\n",
out: "elt1\n" +
"elt2\n",
},
// Same but with a space before {.end}: was a bug.
&Test{
in: "{.repeated section vec }\n" +
"{@} {.end}\n",
out: "elt1 elt2 \n",
},
&Test{
in: "{.repeated section integer}{.end}",
err: "line 1: .repeated: cannot repeat integer (type int)",
},
// Nested names
&Test{
in: "{.section @ }\n" +
"{innerT.item}={innerT.value}\n" +
"{.end}",
out: "ItemNumber1=ValueNumber1\n",
},
&Test{
in: "{.section @ }\n" +
"{innerT.item}={.section innerT}{.section value}{@}{.end}{.end}\n" +
"{.end}",
out: "ItemNumber1=ValueNumber1\n",
},
// Formatters
&Test{
in: "{.section pdata }\n" +
"{header|uppercase}={integer|+1}\n" +
"{header|html}={integer|str}\n" +
"{.end}\n",
out: "HEADER=78\n" +
"Header=77\n",
},
&Test{
in: "{raw}\n" +
"{raw|html}\n",
out: "&<>!@ #$%^\n" +
"&amp;&lt;&gt;!@ #$%^\n",
},
&Test{
in: "{.section emptystring}emptystring{.end}\n" +
"{.section header}header{.end}\n",
out: "\nheader\n",
},
&Test{
in: "{.section true}1{.or}2{.end}\n" +
"{.section false}3{.or}4{.end}\n",
out: "1\n4\n",
},
&Test{
in: "{bytes}",
out: "hello",
},
// Maps
&Test{
in: "{mp.mapkey}\n",
out: "Ahoy!\n",
},
&Test{
in: "{innermap.mp.innerkey}\n",
out: "55\n",
},
&Test{
in: "{stringmap.stringkey1}\n",
out: "stringresult\n",
},
&Test{
in: "{.repeated section stringmap}\n" +
"{@}\n" +
"{.end}",
out: "stringresult\n" +
"stringresult\n",
},
// Interface values
&Test{
in: "{iface}",
out: "[1 2 3]",
},
&Test{
in: "{.repeated section iface}{@}{.alternates with} {.end}",
out: "1 2 3",
},
&Test{
in: "{.section iface}{@}{.end}",
out: "[1 2 3]",
},
}
func TestAll(t *testing.T) {
s := new(S)
// initialized by hand for clarity.
s.header = "Header"
s.integer = 77
s.raw = "&<>!@ #$%^"
s.innerT = t1
s.data = []T{t1, t2}
s.pdata = []*T{&t1, &t2}
s.empty = []*T{}
s.null = nil
s.vec = new(vector.Vector)
s.vec.Push("elt1")
s.vec.Push("elt2")
s.true = true
s.false = false
s.mp = make(map[string]string)
s.mp["mapkey"] = "Ahoy!"
s.innermap.mp = make(map[string]int)
s.innermap.mp["innerkey"] = 55
s.stringmap = make(map[string]string)
s.stringmap["stringkey1"] = "stringresult" // the same value so repeated section is order-independent
s.stringmap["stringkey2"] = "stringresult"
s.bytes = strings.Bytes("hello")
s.iface = []int{1, 2, 3}
var buf bytes.Buffer
for _, test := range tests {
buf.Reset()
tmpl, err := Parse(test.in, formatters)
if err != nil {
t.Error("unexpected parse error:", err)
continue
}
err = tmpl.Execute(s, &buf)
if test.err == "" {
if err != nil {
t.Error("unexpected execute error:", err)
}
} else {
if err == nil {
t.Errorf("expected execute error %q, got nil", test.err)
} else if err.String() != test.err {
t.Errorf("expected execute error %q, got %q", test.err, err.String())
}
}
if buf.String() != test.out {
t.Errorf("for %q: expected %q got %q", test.in, test.out, buf.String())
}
}
}
func TestMapDriverType(t *testing.T) {
mp := map[string]string{"footer": "Ahoy!"}
tmpl, err := Parse("template: {footer}", nil)
if err != nil {
t.Error("unexpected parse error:", err)
}
var b bytes.Buffer
err = tmpl.Execute(mp, &b)
if err != nil {
t.Error("unexpected execute error:", err)
}
s := b.String()
expected := "template: Ahoy!"
if s != expected {
t.Errorf("failed passing string as data: expected %q got %q", "template: Ahoy!", s)
}
}
func TestStringDriverType(t *testing.T) {
tmpl, err := Parse("template: {@}", nil)
if err != nil {
t.Error("unexpected parse error:", err)
}
var b bytes.Buffer
err = tmpl.Execute("hello", &b)
if err != nil {
t.Error("unexpected execute error:", err)
}
s := b.String()
if s != "template: hello" {
t.Errorf("failed passing string as data: expected %q got %q", "template: hello", s)
}
}
func TestTwice(t *testing.T) {
tmpl, err := Parse("template: {@}", nil)
if err != nil {
t.Error("unexpected parse error:", err)
}
var b bytes.Buffer
err = tmpl.Execute("hello", &b)
if err != nil {
t.Error("unexpected parse error:", err)
}
s := b.String()
text := "template: hello"
if s != text {
t.Errorf("failed passing string as data: expected %q got %q", text, s)
}
err = tmpl.Execute("hello", &b)
if err != nil {
t.Error("unexpected parse error:", err)
}
s = b.String()
text += text
if s != text {
t.Errorf("failed passing string as data: expected %q got %q", text, s)
}
}
func TestCustomDelims(t *testing.T) {
// try various lengths. zero should catch error.
for i := 0; i < 7; i++ {
for j := 0; j < 7; j++ {
tmpl := New(nil)
// first two chars deliberately the same to test equal left and right delims
ldelim := "$!#$%^&"[0:i]
rdelim := "$*&^%$!"[0:j]
tmpl.SetDelims(ldelim, rdelim)
// if braces, this would be template: {@}{.meta-left}{.meta-right}
text := "template: " +
ldelim + "@" + rdelim +
ldelim + ".meta-left" + rdelim +
ldelim + ".meta-right" + rdelim
err := tmpl.Parse(text)
if err != nil {
if i == 0 || j == 0 { // expected
continue
}
t.Error("unexpected parse error:", err)
} else if i == 0 || j == 0 {
t.Errorf("expected parse error for empty delimiter: %d %d %q %q", i, j, ldelim, rdelim)
continue
}
var b bytes.Buffer
err = tmpl.Execute("hello", &b)
s := b.String()
if s != "template: hello"+ldelim+rdelim {
t.Errorf("failed delim check(%q %q) %q got %q", ldelim, rdelim, text, s)
}
}
}
}
// Test that a variable evaluates to the field itself and does not further indirection
func TestVarIndirection(t *testing.T) {
s := new(S)
// initialized by hand for clarity.
s.innerPointerT = &t1
var buf bytes.Buffer
input := "{.section @}{innerPointerT}{.end}"
tmpl, err := Parse(input, nil)
if err != nil {
t.Fatal("unexpected parse error:", err)
}
err = tmpl.Execute(s, &buf)
if err != nil {
t.Fatal("unexpected execute error:", err)
}
expect := fmt.Sprintf("%v", &t1) // output should be hex address of t1
if buf.String() != expect {
t.Errorf("for %q: expected %q got %q", input, expect, buf.String())
}
}