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Source file src/mime/encodedword_test.go

Documentation: mime

  // Copyright 2015 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 mime
  
  import (
  	"errors"
  	"io"
  	"io/ioutil"
  	"strings"
  	"testing"
  )
  
  func TestEncodeWord(t *testing.T) {
  	utf8, iso88591 := "utf-8", "iso-8859-1"
  	tests := []struct {
  		enc      WordEncoder
  		charset  string
  		src, exp string
  	}{
  		{QEncoding, utf8, "François-Jérôme", "=?utf-8?q?Fran=C3=A7ois-J=C3=A9r=C3=B4me?="},
  		{BEncoding, utf8, "Café", "=?utf-8?b?Q2Fmw6k=?="},
  		{QEncoding, iso88591, "La Seleção", "=?iso-8859-1?q?La_Sele=C3=A7=C3=A3o?="},
  		{QEncoding, utf8, "", ""},
  		{QEncoding, utf8, "A", "A"},
  		{QEncoding, iso88591, "a", "a"},
  		{QEncoding, utf8, "123 456", "123 456"},
  		{QEncoding, utf8, "\t !\"#$%&'()*+,-./ :;<>?@[\\]^_`{|}~", "\t !\"#$%&'()*+,-./ :;<>?@[\\]^_`{|}~"},
  		{QEncoding, utf8, strings.Repeat("é", 10), "=?utf-8?q?" + strings.Repeat("=C3=A9", 10) + "?="},
  		{QEncoding, utf8, strings.Repeat("é", 11), "=?utf-8?q?" + strings.Repeat("=C3=A9", 10) + "?= =?utf-8?q?=C3=A9?="},
  		{QEncoding, iso88591, strings.Repeat("\xe9", 22), "=?iso-8859-1?q?" + strings.Repeat("=E9", 22) + "?="},
  		{QEncoding, utf8, strings.Repeat("\x80", 22), "=?utf-8?q?" + strings.Repeat("=80", 21) + "?= =?utf-8?q?=80?="},
  		{BEncoding, iso88591, strings.Repeat("\xe9", 45), "=?iso-8859-1?b?" + strings.Repeat("6enp", 15) + "?="},
  		{BEncoding, utf8, strings.Repeat("\x80", 48), "=?utf-8?b?" + strings.Repeat("gICA", 15) + "?= =?utf-8?b?gICA?="},
  	}
  
  	for _, test := range tests {
  		if s := test.enc.Encode(test.charset, test.src); s != test.exp {
  			t.Errorf("Encode(%q) = %q, want %q", test.src, s, test.exp)
  		}
  	}
  }
  
  func TestEncodedWordLength(t *testing.T) {
  	tests := []struct {
  		enc WordEncoder
  		src string
  	}{
  		{QEncoding, strings.Repeat("à", 30)},
  		{QEncoding, strings.Repeat("é", 60)},
  		{BEncoding, strings.Repeat("ï", 25)},
  		{BEncoding, strings.Repeat("ô", 37)},
  		{BEncoding, strings.Repeat("\x80", 50)},
  		{QEncoding, "{$firstname} Bienvendio a Apostolica, aquà inicia el camino de tu"},
  	}
  
  	for _, test := range tests {
  		s := test.enc.Encode("utf-8", test.src)
  		wordLen := 0
  		for i := 0; i < len(s); i++ {
  			if s[i] == ' ' {
  				wordLen = 0
  				continue
  			}
  
  			wordLen++
  			if wordLen > maxEncodedWordLen {
  				t.Errorf("Encode(%q) has more than %d characters: %q",
  					test.src, maxEncodedWordLen, s)
  			}
  		}
  	}
  }
  
  func TestDecodeWord(t *testing.T) {
  	tests := []struct {
  		src, exp string
  		hasErr   bool
  	}{
  		{"=?UTF-8?Q?=C2=A1Hola,_se=C3=B1or!?=", "¡Hola, señor!", false},
  		{"=?UTF-8?Q?Fran=C3=A7ois-J=C3=A9r=C3=B4me?=", "François-Jérôme", false},
  		{"=?UTF-8?q?ascii?=", "ascii", false},
  		{"=?utf-8?B?QW5kcsOp?=", "André", false},
  		{"=?ISO-8859-1?Q?Rapha=EBl_Dupont?=", "Raphaël Dupont", false},
  		{"=?utf-8?b?IkFudG9uaW8gSm9zw6kiIDxqb3NlQGV4YW1wbGUub3JnPg==?=", `"Antonio José" <jose@example.org>`, false},
  		{"=?UTF-8?A?Test?=", "", true},
  		{"=?UTF-8?Q?A=B?=", "", true},
  		{"=?UTF-8?Q?=A?=", "", true},
  		{"=?UTF-8?A?A?=", "", true},
  		{"=????=", "", true},
  		{"=?UTF-8???=", "", true},
  		{"=?UTF-8?Q??=", "", false},
  	}
  
  	for _, test := range tests {
  		dec := new(WordDecoder)
  		s, err := dec.Decode(test.src)
  		if test.hasErr && err == nil {
  			t.Errorf("Decode(%q) should return an error", test.src)
  			continue
  		}
  		if !test.hasErr && err != nil {
  			t.Errorf("Decode(%q): %v", test.src, err)
  			continue
  		}
  		if s != test.exp {
  			t.Errorf("Decode(%q) = %q, want %q", test.src, s, test.exp)
  		}
  	}
  }
  
  func TestDecodeHeader(t *testing.T) {
  	tests := []struct {
  		src, exp string
  	}{
  		{"=?UTF-8?Q?=C2=A1Hola,_se=C3=B1or!?=", "¡Hola, señor!"},
  		{"=?UTF-8?Q?Fran=C3=A7ois-J=C3=A9r=C3=B4me?=", "François-Jérôme"},
  		{"=?UTF-8?q?ascii?=", "ascii"},
  		{"=?utf-8?B?QW5kcsOp?=", "André"},
  		{"=?ISO-8859-1?Q?Rapha=EBl_Dupont?=", "Raphaël Dupont"},
  		{"Jean", "Jean"},
  		{"=?utf-8?b?IkFudG9uaW8gSm9zw6kiIDxqb3NlQGV4YW1wbGUub3JnPg==?=", `"Antonio José" <jose@example.org>`},
  		{"=?UTF-8?A?Test?=", "=?UTF-8?A?Test?="},
  		{"=?UTF-8?Q?A=B?=", "=?UTF-8?Q?A=B?="},
  		{"=?UTF-8?Q?=A?=", "=?UTF-8?Q?=A?="},
  		{"=?UTF-8?A?A?=", "=?UTF-8?A?A?="},
  		// Incomplete words
  		{"=?", "=?"},
  		{"=?UTF-8?", "=?UTF-8?"},
  		{"=?UTF-8?=", "=?UTF-8?="},
  		{"=?UTF-8?Q", "=?UTF-8?Q"},
  		{"=?UTF-8?Q?", "=?UTF-8?Q?"},
  		{"=?UTF-8?Q?=", "=?UTF-8?Q?="},
  		{"=?UTF-8?Q?A", "=?UTF-8?Q?A"},
  		{"=?UTF-8?Q?A?", "=?UTF-8?Q?A?"},
  		// Tests from RFC 2047
  		{"=?ISO-8859-1?Q?a?=", "a"},
  		{"=?ISO-8859-1?Q?a?= b", "a b"},
  		{"=?ISO-8859-1?Q?a?= =?ISO-8859-1?Q?b?=", "ab"},
  		{"=?ISO-8859-1?Q?a?=  =?ISO-8859-1?Q?b?=", "ab"},
  		{"=?ISO-8859-1?Q?a?= \r\n\t =?ISO-8859-1?Q?b?=", "ab"},
  		{"=?ISO-8859-1?Q?a_b?=", "a b"},
  	}
  
  	for _, test := range tests {
  		dec := new(WordDecoder)
  		s, err := dec.DecodeHeader(test.src)
  		if err != nil {
  			t.Errorf("DecodeHeader(%q): %v", test.src, err)
  		}
  		if s != test.exp {
  			t.Errorf("DecodeHeader(%q) = %q, want %q", test.src, s, test.exp)
  		}
  	}
  }
  
  func TestCharsetDecoder(t *testing.T) {
  	tests := []struct {
  		src      string
  		want     string
  		charsets []string
  		content  []string
  	}{
  		{"=?utf-8?b?Q2Fmw6k=?=", "Café", nil, nil},
  		{"=?ISO-8859-1?Q?caf=E9?=", "café", nil, nil},
  		{"=?US-ASCII?Q?foo_bar?=", "foo bar", nil, nil},
  		{"=?utf-8?Q?=?=", "=?utf-8?Q?=?=", nil, nil},
  		{"=?utf-8?Q?=A?=", "=?utf-8?Q?=A?=", nil, nil},
  		{
  			"=?ISO-8859-15?Q?f=F5=F6?=  =?windows-1252?Q?b=E0r?=",
  			"f\xf5\xf6b\xe0r",
  			[]string{"iso-8859-15", "windows-1252"},
  			[]string{"f\xf5\xf6", "b\xe0r"},
  		},
  	}
  
  	for _, test := range tests {
  		i := 0
  		dec := &WordDecoder{
  			CharsetReader: func(charset string, input io.Reader) (io.Reader, error) {
  				if charset != test.charsets[i] {
  					t.Errorf("DecodeHeader(%q), got charset %q, want %q", test.src, charset, test.charsets[i])
  				}
  				content, err := ioutil.ReadAll(input)
  				if err != nil {
  					t.Errorf("DecodeHeader(%q), error in reader: %v", test.src, err)
  				}
  				got := string(content)
  				if got != test.content[i] {
  					t.Errorf("DecodeHeader(%q), got content %q, want %q", test.src, got, test.content[i])
  				}
  				i++
  
  				return strings.NewReader(got), nil
  			},
  		}
  		got, err := dec.DecodeHeader(test.src)
  		if err != nil {
  			t.Errorf("DecodeHeader(%q): %v", test.src, err)
  		}
  		if got != test.want {
  			t.Errorf("DecodeHeader(%q) = %q, want %q", test.src, got, test.want)
  		}
  	}
  }
  
  func TestCharsetDecoderError(t *testing.T) {
  	dec := &WordDecoder{
  		CharsetReader: func(charset string, input io.Reader) (io.Reader, error) {
  			return nil, errors.New("Test error")
  		},
  	}
  
  	if _, err := dec.DecodeHeader("=?charset?Q?foo?="); err == nil {
  		t.Error("DecodeHeader should return an error")
  	}
  }
  
  func BenchmarkQEncodeWord(b *testing.B) {
  	for i := 0; i < b.N; i++ {
  		QEncoding.Encode("UTF-8", "¡Hola, señor!")
  	}
  }
  
  func BenchmarkQDecodeWord(b *testing.B) {
  	dec := new(WordDecoder)
  
  	for i := 0; i < b.N; i++ {
  		dec.Decode("=?utf-8?q?=C2=A1Hola,_se=C3=B1or!?=")
  	}
  }
  
  func BenchmarkQDecodeHeader(b *testing.B) {
  	dec := new(WordDecoder)
  
  	for i := 0; i < b.N; i++ {
  		dec.DecodeHeader("=?utf-8?q?=C2=A1Hola,_se=C3=B1or!?=")
  	}
  }
  

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