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Source file src/html/template/css_test.go

Documentation: html/template

  // 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 (
  	"strconv"
  	"strings"
  	"testing"
  )
  
  func TestEndsWithCSSKeyword(t *testing.T) {
  	tests := []struct {
  		css, kw string
  		want    bool
  	}{
  		{"", "url", false},
  		{"url", "url", true},
  		{"URL", "url", true},
  		{"Url", "url", true},
  		{"url", "important", false},
  		{"important", "important", true},
  		{"image-url", "url", false},
  		{"imageurl", "url", false},
  		{"image url", "url", true},
  	}
  	for _, test := range tests {
  		got := endsWithCSSKeyword([]byte(test.css), test.kw)
  		if got != test.want {
  			t.Errorf("want %t but got %t for css=%v, kw=%v", test.want, got, test.css, test.kw)
  		}
  	}
  }
  
  func TestIsCSSNmchar(t *testing.T) {
  	tests := []struct {
  		rune rune
  		want bool
  	}{
  		{0, false},
  		{'0', true},
  		{'9', true},
  		{'A', true},
  		{'Z', true},
  		{'a', true},
  		{'z', true},
  		{'_', true},
  		{'-', true},
  		{':', false},
  		{';', false},
  		{' ', false},
  		{0x7f, false},
  		{0x80, true},
  		{0x1234, true},
  		{0xd800, false},
  		{0xdc00, false},
  		{0xfffe, false},
  		{0x10000, true},
  		{0x110000, false},
  	}
  	for _, test := range tests {
  		got := isCSSNmchar(test.rune)
  		if got != test.want {
  			t.Errorf("%q: want %t but got %t", string(test.rune), test.want, got)
  		}
  	}
  }
  
  func TestDecodeCSS(t *testing.T) {
  	tests := []struct {
  		css, want string
  	}{
  		{``, ``},
  		{`foo`, `foo`},
  		{`foo\`, `foo`},
  		{`foo\\`, `foo\`},
  		{`\`, ``},
  		{`\A`, "\n"},
  		{`\a`, "\n"},
  		{`\0a`, "\n"},
  		{`\00000a`, "\n"},
  		{`\000000a`, "\u0000a"},
  		{`\1234 5`, "\u1234" + "5"},
  		{`\1234\20 5`, "\u1234" + " 5"},
  		{`\1234\A 5`, "\u1234" + "\n5"},
  		{"\\1234\t5", "\u1234" + "5"},
  		{"\\1234\n5", "\u1234" + "5"},
  		{"\\1234\r\n5", "\u1234" + "5"},
  		{`\12345`, "\U00012345"},
  		{`\\`, `\`},
  		{`\\ `, `\ `},
  		{`\"`, `"`},
  		{`\'`, `'`},
  		{`\.`, `.`},
  		{`\. .`, `. .`},
  		{
  			`The \3c i\3equick\3c/i\3e,\d\A\3cspan style=\27 color:brown\27\3e brown\3c/span\3e  fox jumps\2028over the \3c canine class=\22lazy\22 \3e dog\3c/canine\3e`,
  			"The <i>quick</i>,\r\n<span style='color:brown'>brown</span> fox jumps\u2028over the <canine class=\"lazy\">dog</canine>",
  		},
  	}
  	for _, test := range tests {
  		got1 := string(decodeCSS([]byte(test.css)))
  		if got1 != test.want {
  			t.Errorf("%q: want\n\t%q\nbut got\n\t%q", test.css, test.want, got1)
  		}
  		recoded := cssEscaper(got1)
  		if got2 := string(decodeCSS([]byte(recoded))); got2 != test.want {
  			t.Errorf("%q: escape & decode not dual for %q", test.css, recoded)
  		}
  	}
  }
  
  func TestHexDecode(t *testing.T) {
  	for i := 0; i < 0x200000; i += 101 /* coprime with 16 */ {
  		s := strconv.FormatInt(int64(i), 16)
  		if got := int(hexDecode([]byte(s))); got != i {
  			t.Errorf("%s: want %d but got %d", s, i, got)
  		}
  		s = strings.ToUpper(s)
  		if got := int(hexDecode([]byte(s))); got != i {
  			t.Errorf("%s: want %d but got %d", s, i, got)
  		}
  	}
  }
  
  func TestSkipCSSSpace(t *testing.T) {
  	tests := []struct {
  		css, want string
  	}{
  		{"", ""},
  		{"foo", "foo"},
  		{"\n", ""},
  		{"\r\n", ""},
  		{"\r", ""},
  		{"\t", ""},
  		{" ", ""},
  		{"\f", ""},
  		{" foo", "foo"},
  		{"  foo", " foo"},
  		{`\20`, `\20`},
  	}
  	for _, test := range tests {
  		got := string(skipCSSSpace([]byte(test.css)))
  		if got != test.want {
  			t.Errorf("%q: want %q but got %q", test.css, test.want, got)
  		}
  	}
  }
  
  func TestCSSEscaper(t *testing.T) {
  	input := ("\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f" +
  		"\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f" +
  		` !"#$%&'()*+,-./` +
  		`0123456789:;<=>?` +
  		`@ABCDEFGHIJKLMNO` +
  		`PQRSTUVWXYZ[\]^_` +
  		"`abcdefghijklmno" +
  		"pqrstuvwxyz{|}~\x7f" +
  		"\u00A0\u0100\u2028\u2029\ufeff\U0001D11E")
  
  	want := ("\\0\x01\x02\x03\x04\x05\x06\x07" +
  		"\x08\\9 \\a\x0b\\c \\d\x0E\x0F" +
  		"\x10\x11\x12\x13\x14\x15\x16\x17" +
  		"\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f" +
  		` !\22#$%\26\27\28\29*\2b,-.\2f ` +
  		`0123456789\3a\3b\3c=\3e?` +
  		`@ABCDEFGHIJKLMNO` +
  		`PQRSTUVWXYZ[\\]^_` +
  		"`abcdefghijklmno" +
  		`pqrstuvwxyz\7b|\7d~` + "\u007f" +
  		"\u00A0\u0100\u2028\u2029\ufeff\U0001D11E")
  
  	got := cssEscaper(input)
  	if got != want {
  		t.Errorf("encode: want\n\t%q\nbut got\n\t%q", want, got)
  	}
  
  	got = string(decodeCSS([]byte(got)))
  	if input != got {
  		t.Errorf("decode: want\n\t%q\nbut got\n\t%q", input, got)
  	}
  }
  
  func TestCSSValueFilter(t *testing.T) {
  	tests := []struct {
  		css, want string
  	}{
  		{"", ""},
  		{"foo", "foo"},
  		{"0", "0"},
  		{"0px", "0px"},
  		{"-5px", "-5px"},
  		{"1.25in", "1.25in"},
  		{"+.33em", "+.33em"},
  		{"100%", "100%"},
  		{"12.5%", "12.5%"},
  		{".foo", ".foo"},
  		{"#bar", "#bar"},
  		{"corner-radius", "corner-radius"},
  		{"-moz-corner-radius", "-moz-corner-radius"},
  		{"#000", "#000"},
  		{"#48f", "#48f"},
  		{"#123456", "#123456"},
  		{"U+00-FF, U+980-9FF", "U+00-FF, U+980-9FF"},
  		{"color: red", "color: red"},
  		{"<!--", "ZgotmplZ"},
  		{"-->", "ZgotmplZ"},
  		{"<![CDATA[", "ZgotmplZ"},
  		{"]]>", "ZgotmplZ"},
  		{"</style", "ZgotmplZ"},
  		{`"`, "ZgotmplZ"},
  		{`'`, "ZgotmplZ"},
  		{"`", "ZgotmplZ"},
  		{"\x00", "ZgotmplZ"},
  		{"/* foo */", "ZgotmplZ"},
  		{"//", "ZgotmplZ"},
  		{"[href=~", "ZgotmplZ"},
  		{"expression(alert(1337))", "ZgotmplZ"},
  		{"-expression(alert(1337))", "ZgotmplZ"},
  		{"expression", "ZgotmplZ"},
  		{"Expression", "ZgotmplZ"},
  		{"EXPRESSION", "ZgotmplZ"},
  		{"-moz-binding", "ZgotmplZ"},
  		{"-expr\x00ession(alert(1337))", "ZgotmplZ"},
  		{`-expr\0ession(alert(1337))`, "ZgotmplZ"},
  		{`-express\69on(alert(1337))`, "ZgotmplZ"},
  		{`-express\69 on(alert(1337))`, "ZgotmplZ"},
  		{`-exp\72 ession(alert(1337))`, "ZgotmplZ"},
  		{`-exp\52 ession(alert(1337))`, "ZgotmplZ"},
  		{`-exp\000052 ession(alert(1337))`, "ZgotmplZ"},
  		{`-expre\0000073sion`, "-expre\x073sion"},
  		{`@import url evil.css`, "ZgotmplZ"},
  	}
  	for _, test := range tests {
  		got := cssValueFilter(test.css)
  		if got != test.want {
  			t.Errorf("%q: want %q but got %q", test.css, test.want, got)
  		}
  	}
  }
  
  func BenchmarkCSSEscaper(b *testing.B) {
  	for i := 0; i < b.N; i++ {
  		cssEscaper("The <i>quick</i>,\r\n<span style='color:brown'>brown</span> fox jumps\u2028over the <canine class=\"lazy\">dog</canine>")
  	}
  }
  
  func BenchmarkCSSEscaperNoSpecials(b *testing.B) {
  	for i := 0; i < b.N; i++ {
  		cssEscaper("The quick, brown fox jumps over the lazy dog.")
  	}
  }
  
  func BenchmarkDecodeCSS(b *testing.B) {
  	s := []byte(`The \3c i\3equick\3c/i\3e,\d\A\3cspan style=\27 color:brown\27\3e brown\3c/span\3e fox jumps\2028over the \3c canine class=\22lazy\22 \3edog\3c/canine\3e`)
  	b.ResetTimer()
  	for i := 0; i < b.N; i++ {
  		decodeCSS(s)
  	}
  }
  
  func BenchmarkDecodeCSSNoSpecials(b *testing.B) {
  	s := []byte("The quick, brown fox jumps over the lazy dog.")
  	b.ResetTimer()
  	for i := 0; i < b.N; i++ {
  		decodeCSS(s)
  	}
  }
  
  func BenchmarkCSSValueFilter(b *testing.B) {
  	for i := 0; i < b.N; i++ {
  		cssValueFilter(`  e\78preS\0Sio/**/n(alert(1337))`)
  	}
  }
  
  func BenchmarkCSSValueFilterOk(b *testing.B) {
  	for i := 0; i < b.N; i++ {
  		cssValueFilter(`Times New Roman`)
  	}
  }
  

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