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// 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 (
        "html"
        "strings"
        "testing"
)

func TestHTMLNospaceEscaper(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\ufdec\U0001D11E")

        want := ("&#xfffd;\x01\x02\x03\x04\x05\x06\x07" +
                "\x08&#9;&#10;&#11;&#12;&#13;\x0E\x0F" +
                "\x10\x11\x12\x13\x14\x15\x16\x17" +
                "\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f" +
                `&#32;!&#34;#$%&amp;&#39;()*&#43;,-./` +
                `0123456789:;&lt;&#61;&gt;?` +
                `@ABCDEFGHIJKLMNO` +
                `PQRSTUVWXYZ[\]^_` +
                `&#96;abcdefghijklmno` +
                `pqrstuvwxyz{|}~` + "\u007f" +
                "\u00A0\u0100\u2028\u2029\ufeff&#xfdec;\U0001D11E")

        got := htmlNospaceEscaper(input)
        if got != want {
                t.Errorf("encode: want\n\t%q\nbut got\n\t%q", want, got)
        }

        got, want = html.UnescapeString(got), strings.Replace(input, "\x00", "\ufffd", 1)
        if want != got {
                t.Errorf("decode: want\n\t%q\nbut got\n\t%q", want, got)
        }
}

func TestStripTags(t *testing.T) {
        tests := []struct {
                input, want string
        }{
                {"", ""},
                {"Hello, World!", "Hello, World!"},
                {"foo&amp;bar", "foo&amp;bar"},
                {`Hello <a href="www.example.com/">World</a>!`, "Hello World!"},
                {"Foo <textarea>Bar</textarea> Baz", "Foo Bar Baz"},
                {"Foo <!-- Bar --> Baz", "Foo  Baz"},
                {"<", "<"},
                {"foo < bar", "foo < bar"},
                {`Foo<script type="text/javascript">alert(1337)</script>Bar`, "FooBar"},
                {`Foo<div title="1>2">Bar`, "FooBar"},
                {`I <3 Ponies!`, `I <3 Ponies!`},
                {`<script>foo()</script>`, ``},
        }

        for _, test := range tests {
                if got := stripTags(test.input); got != test.want {
                        t.Errorf("%q: want %q, got %q", test.input, test.want, got)
                }
        }
}

func BenchmarkHTMLNospaceEscaper(b *testing.B) {
        for i := 0; i < b.N; i++ {
                htmlNospaceEscaper("The <i>quick</i>,\r\n<span style='color:brown'>brown</span> fox jumps\u2028over the <canine class=\"lazy\">dog</canine>")
        }
}

func BenchmarkHTMLNospaceEscaperNoSpecials(b *testing.B) {
        for i := 0; i < b.N; i++ {
                htmlNospaceEscaper("The_quick,_brown_fox_jumps_over_the_lazy_dog.")
        }
}

func BenchmarkStripTags(b *testing.B) {
        for i := 0; i < b.N; i++ {
                stripTags("The <i>quick</i>,\r\n<span style='color:brown'>brown</span> fox jumps\u2028over the <canine class=\"lazy\">dog</canine>")
        }
}

func BenchmarkStripTagsNoSpecials(b *testing.B) {
        for i := 0; i < b.N; i++ {
                stripTags("The quick, brown fox jumps over the lazy dog.")
        }
}