Source file src/net/mail/message_test.go

     1  // Copyright 2011 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package mail
     6  
     7  import (
     8  	"bytes"
     9  	"io"
    10  	"mime"
    11  	"reflect"
    12  	"strings"
    13  	"testing"
    14  	"time"
    15  )
    16  
    17  var parseTests = []struct {
    18  	in     string
    19  	header Header
    20  	body   string
    21  }{
    22  	{
    23  		// RFC 5322, Appendix A.1.1
    24  		in: `From: John Doe <jdoe@machine.example>
    25  To: Mary Smith <mary@example.net>
    26  Subject: Saying Hello
    27  Date: Fri, 21 Nov 1997 09:55:06 -0600
    28  Message-ID: <1234@local.machine.example>
    29  
    30  This is a message just to say hello.
    31  So, "Hello".
    32  `,
    33  		header: Header{
    34  			"From":       []string{"John Doe <jdoe@machine.example>"},
    35  			"To":         []string{"Mary Smith <mary@example.net>"},
    36  			"Subject":    []string{"Saying Hello"},
    37  			"Date":       []string{"Fri, 21 Nov 1997 09:55:06 -0600"},
    38  			"Message-Id": []string{"<1234@local.machine.example>"},
    39  		},
    40  		body: "This is a message just to say hello.\nSo, \"Hello\".\n",
    41  	},
    42  }
    43  
    44  func TestParsing(t *testing.T) {
    45  	for i, test := range parseTests {
    46  		msg, err := ReadMessage(bytes.NewBuffer([]byte(test.in)))
    47  		if err != nil {
    48  			t.Errorf("test #%d: Failed parsing message: %v", i, err)
    49  			continue
    50  		}
    51  		if !headerEq(msg.Header, test.header) {
    52  			t.Errorf("test #%d: Incorrectly parsed message header.\nGot:\n%+v\nWant:\n%+v",
    53  				i, msg.Header, test.header)
    54  		}
    55  		body, err := io.ReadAll(msg.Body)
    56  		if err != nil {
    57  			t.Errorf("test #%d: Failed reading body: %v", i, err)
    58  			continue
    59  		}
    60  		bodyStr := string(body)
    61  		if bodyStr != test.body {
    62  			t.Errorf("test #%d: Incorrectly parsed message body.\nGot:\n%+v\nWant:\n%+v",
    63  				i, bodyStr, test.body)
    64  		}
    65  	}
    66  }
    67  
    68  func headerEq(a, b Header) bool {
    69  	if len(a) != len(b) {
    70  		return false
    71  	}
    72  	for k, as := range a {
    73  		bs, ok := b[k]
    74  		if !ok {
    75  			return false
    76  		}
    77  		if !reflect.DeepEqual(as, bs) {
    78  			return false
    79  		}
    80  	}
    81  	return true
    82  }
    83  
    84  func TestDateParsing(t *testing.T) {
    85  	tests := []struct {
    86  		dateStr string
    87  		exp     time.Time
    88  	}{
    89  		// RFC 5322, Appendix A.1.1
    90  		{
    91  			"Fri, 21 Nov 1997 09:55:06 -0600",
    92  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
    93  		},
    94  		// RFC 5322, Appendix A.6.2
    95  		// Obsolete date.
    96  		{
    97  			"21 Nov 97 09:55:06 GMT",
    98  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("GMT", 0)),
    99  		},
   100  		// Commonly found format not specified by RFC 5322.
   101  		{
   102  			"Fri, 21 Nov 1997 09:55:06 -0600 (MDT)",
   103  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   104  		},
   105  		{
   106  			"Thu, 20 Nov 1997 09:55:06 -0600 (MDT)",
   107  			time.Date(1997, 11, 20, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   108  		},
   109  		{
   110  			"Thu, 20 Nov 1997 09:55:06 GMT (GMT)",
   111  			time.Date(1997, 11, 20, 9, 55, 6, 0, time.UTC),
   112  		},
   113  		{
   114  			"Fri, 21 Nov 1997 09:55:06 +1300 (TOT)",
   115  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", +13*60*60)),
   116  		},
   117  	}
   118  	for _, test := range tests {
   119  		hdr := Header{
   120  			"Date": []string{test.dateStr},
   121  		}
   122  		date, err := hdr.Date()
   123  		if err != nil {
   124  			t.Errorf("Header(Date: %s).Date(): %v", test.dateStr, err)
   125  		} else if !date.Equal(test.exp) {
   126  			t.Errorf("Header(Date: %s).Date() = %+v, want %+v", test.dateStr, date, test.exp)
   127  		}
   128  
   129  		date, err = ParseDate(test.dateStr)
   130  		if err != nil {
   131  			t.Errorf("ParseDate(%s): %v", test.dateStr, err)
   132  		} else if !date.Equal(test.exp) {
   133  			t.Errorf("ParseDate(%s) = %+v, want %+v", test.dateStr, date, test.exp)
   134  		}
   135  	}
   136  }
   137  
   138  func TestDateParsingCFWS(t *testing.T) {
   139  	tests := []struct {
   140  		dateStr string
   141  		exp     time.Time
   142  		valid   bool
   143  	}{
   144  		// FWS-only. No date.
   145  		{
   146  			"   ",
   147  			// nil is not allowed
   148  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   149  			false,
   150  		},
   151  		// FWS is allowed before optional day of week.
   152  		{
   153  			"   Fri, 21 Nov 1997 09:55:06 -0600",
   154  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   155  			true,
   156  		},
   157  		{
   158  			"21 Nov 1997 09:55:06 -0600",
   159  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   160  			true,
   161  		},
   162  		{
   163  			"Fri 21 Nov 1997 09:55:06 -0600",
   164  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   165  			false, // missing ,
   166  		},
   167  		// FWS is allowed before day of month but HTAB fails.
   168  		{
   169  			"Fri,        21 Nov 1997 09:55:06 -0600",
   170  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   171  			true,
   172  		},
   173  		// FWS is allowed before and after year but HTAB fails.
   174  		{
   175  			"Fri, 21 Nov       1997     09:55:06 -0600",
   176  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   177  			true,
   178  		},
   179  		// FWS is allowed before zone but HTAB is not handled. Obsolete timezone is handled.
   180  		{
   181  			"Fri, 21 Nov 1997 09:55:06           CST",
   182  			time.Time{},
   183  			true,
   184  		},
   185  		// FWS is allowed after date and a CRLF is already replaced.
   186  		{
   187  			"Fri, 21 Nov 1997 09:55:06           CST (no leading FWS and a trailing CRLF) \r\n",
   188  			time.Time{},
   189  			true,
   190  		},
   191  		// CFWS is a reduced set of US-ASCII where space and accentuated are obsolete. No error.
   192  		{
   193  			"Fri, 21    Nov 1997    09:55:06 -0600 (MDT and non-US-ASCII signs éèç )",
   194  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   195  			true,
   196  		},
   197  		// CFWS is allowed after zone including a nested comment.
   198  		// Trailing FWS is allowed.
   199  		{
   200  			"Fri, 21 Nov 1997 09:55:06 -0600    \r\n (thisisa(valid)cfws)   \t ",
   201  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   202  			true,
   203  		},
   204  		// CRLF is incomplete and misplaced.
   205  		{
   206  			"Fri, 21 Nov 1997 \r 09:55:06 -0600    \r\n (thisisa(valid)cfws)   \t ",
   207  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   208  			false,
   209  		},
   210  		// CRLF is complete but misplaced. No error is returned.
   211  		{
   212  			"Fri, 21 Nov 199\r\n7  09:55:06 -0600    \r\n (thisisa(valid)cfws)   \t ",
   213  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   214  			true, // should be false in the strict interpretation of RFC 5322.
   215  		},
   216  		// Invalid ASCII in date.
   217  		{
   218  			"Fri, 21 Nov 1997 ù 09:55:06 -0600    \r\n (thisisa(valid)cfws)   \t ",
   219  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   220  			false,
   221  		},
   222  		// CFWS chars () in date.
   223  		{
   224  			"Fri, 21 Nov () 1997 09:55:06 -0600    \r\n (thisisa(valid)cfws)   \t ",
   225  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   226  			false,
   227  		},
   228  		// Timezone is invalid but T is found in comment.
   229  		{
   230  			"Fri, 21 Nov 1997 09:55:06 -060    \r\n (Thisisa(valid)cfws)   \t ",
   231  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   232  			false,
   233  		},
   234  		// Date has no month.
   235  		{
   236  			"Fri, 21  1997 09:55:06 -0600",
   237  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   238  			false,
   239  		},
   240  		// Invalid month : OCT iso Oct
   241  		{
   242  			"Fri, 21 OCT 1997 09:55:06 CST",
   243  			time.Time{},
   244  			false,
   245  		},
   246  		// A too short time zone.
   247  		{
   248  			"Fri, 21 Nov 1997 09:55:06 -060",
   249  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   250  			false,
   251  		},
   252  		// A too short obsolete time zone.
   253  		{
   254  			"Fri, 21  1997 09:55:06 GT",
   255  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.FixedZone("", -6*60*60)),
   256  			false,
   257  		},
   258  		// Ensure that the presence of "T" in the date
   259  		// doesn't trip out ParseDate, as per issue 39260.
   260  		{
   261  			"Tue, 26 May 2020 14:04:40 GMT",
   262  			time.Date(2020, 05, 26, 14, 04, 40, 0, time.UTC),
   263  			true,
   264  		},
   265  		{
   266  			"Tue, 26 May 2020 14:04:40 UT",
   267  			time.Date(2020, 05, 26, 14, 04, 40, 0, time.UTC),
   268  			false,
   269  		},
   270  		{
   271  			"Thu, 21 May 2020 14:04:40 UT",
   272  			time.Date(2020, 05, 21, 14, 04, 40, 0, time.UTC),
   273  			false,
   274  		},
   275  		{
   276  			"Thu, 21 May 2020 14:04:40 UTC",
   277  			time.Date(2020, 05, 21, 14, 04, 40, 0, time.UTC),
   278  			true,
   279  		},
   280  		{
   281  			"Fri, 21 Nov 1997 09:55:06 GMT (GMT)",
   282  			time.Date(1997, 11, 21, 9, 55, 6, 0, time.UTC),
   283  			true,
   284  		},
   285  	}
   286  	for _, test := range tests {
   287  		hdr := Header{
   288  			"Date": []string{test.dateStr},
   289  		}
   290  		date, err := hdr.Date()
   291  		if err != nil && test.valid {
   292  			t.Errorf("Header(Date: %s).Date(): %v", test.dateStr, err)
   293  		} else if err == nil && test.exp.IsZero() {
   294  			// OK.  Used when exact result depends on the
   295  			// system's local zoneinfo.
   296  		} else if err == nil && !date.Equal(test.exp) && test.valid {
   297  			t.Errorf("Header(Date: %s).Date() = %+v, want %+v", test.dateStr, date, test.exp)
   298  		} else if err == nil && !test.valid { // an invalid expression was tested
   299  			t.Errorf("Header(Date: %s).Date() did not return an error but %v", test.dateStr, date)
   300  		}
   301  
   302  		date, err = ParseDate(test.dateStr)
   303  		if err != nil && test.valid {
   304  			t.Errorf("ParseDate(%s): %v", test.dateStr, err)
   305  		} else if err == nil && test.exp.IsZero() {
   306  			// OK.  Used when exact result depends on the
   307  			// system's local zoneinfo.
   308  		} else if err == nil && !test.valid { // an invalid expression was tested
   309  			t.Errorf("ParseDate(%s) did not return an error but %v", test.dateStr, date)
   310  		} else if err == nil && test.valid && !date.Equal(test.exp) {
   311  			t.Errorf("ParseDate(%s) = %+v, want %+v", test.dateStr, date, test.exp)
   312  		}
   313  	}
   314  }
   315  
   316  func TestAddressParsingError(t *testing.T) {
   317  	mustErrTestCases := [...]struct {
   318  		text        string
   319  		wantErrText string
   320  	}{
   321  		0:  {"=?iso-8859-2?Q?Bogl=E1rka_Tak=E1cs?= <unknown@gmail.com>", "charset not supported"},
   322  		1:  {"a@gmail.com b@gmail.com", "expected single address"},
   323  		2:  {string([]byte{0xed, 0xa0, 0x80}) + " <micro@example.net>", "invalid utf-8 in address"},
   324  		3:  {"\"" + string([]byte{0xed, 0xa0, 0x80}) + "\" <half-surrogate@example.com>", "invalid utf-8 in quoted-string"},
   325  		4:  {"\"\\" + string([]byte{0x80}) + "\" <escaped-invalid-unicode@example.net>", "invalid utf-8 in quoted-string"},
   326  		5:  {"\"\x00\" <null@example.net>", "bad character in quoted-string"},
   327  		6:  {"\"\\\x00\" <escaped-null@example.net>", "bad character in quoted-string"},
   328  		7:  {"John Doe", "no angle-addr"},
   329  		8:  {`<jdoe#machine.example>`, "missing @ in addr-spec"},
   330  		9:  {`John <middle> Doe <jdoe@machine.example>`, "missing @ in addr-spec"},
   331  		10: {"cfws@example.com (", "misformatted parenthetical comment"},
   332  		11: {"empty group: ;", "empty group"},
   333  		12: {"root group: embed group: null@example.com;", "no angle-addr"},
   334  		13: {"group not closed: null@example.com", "expected comma"},
   335  		14: {"group: first@example.com, second@example.com;", "group with multiple addresses"},
   336  		15: {"john.doe", "missing '@' or angle-addr"},
   337  		16: {"john.doe@", "no angle-addr"},
   338  		17: {"John Doe@foo.bar", "no angle-addr"},
   339  	}
   340  
   341  	for i, tc := range mustErrTestCases {
   342  		_, err := ParseAddress(tc.text)
   343  		if err == nil || !strings.Contains(err.Error(), tc.wantErrText) {
   344  			t.Errorf(`mail.ParseAddress(%q) #%d want %q, got %v`, tc.text, i, tc.wantErrText, err)
   345  		}
   346  	}
   347  }
   348  
   349  func TestAddressParsing(t *testing.T) {
   350  	tests := []struct {
   351  		addrsStr string
   352  		exp      []*Address
   353  	}{
   354  		// Bare address
   355  		{
   356  			`jdoe@machine.example`,
   357  			[]*Address{{
   358  				Address: "jdoe@machine.example",
   359  			}},
   360  		},
   361  		// RFC 5322, Appendix A.1.1
   362  		{
   363  			`John Doe <jdoe@machine.example>`,
   364  			[]*Address{{
   365  				Name:    "John Doe",
   366  				Address: "jdoe@machine.example",
   367  			}},
   368  		},
   369  		// RFC 5322, Appendix A.1.2
   370  		{
   371  			`"Joe Q. Public" <john.q.public@example.com>`,
   372  			[]*Address{{
   373  				Name:    "Joe Q. Public",
   374  				Address: "john.q.public@example.com",
   375  			}},
   376  		},
   377  		{
   378  			`"John (middle) Doe" <jdoe@machine.example>`,
   379  			[]*Address{{
   380  				Name:    "John (middle) Doe",
   381  				Address: "jdoe@machine.example",
   382  			}},
   383  		},
   384  		{
   385  			`John (middle) Doe <jdoe@machine.example>`,
   386  			[]*Address{{
   387  				Name:    "John (middle) Doe",
   388  				Address: "jdoe@machine.example",
   389  			}},
   390  		},
   391  		{
   392  			`John !@M@! Doe <jdoe@machine.example>`,
   393  			[]*Address{{
   394  				Name:    "John !@M@! Doe",
   395  				Address: "jdoe@machine.example",
   396  			}},
   397  		},
   398  		{
   399  			`"John <middle> Doe" <jdoe@machine.example>`,
   400  			[]*Address{{
   401  				Name:    "John <middle> Doe",
   402  				Address: "jdoe@machine.example",
   403  			}},
   404  		},
   405  		{
   406  			`Mary Smith <mary@x.test>, jdoe@example.org, Who? <one@y.test>`,
   407  			[]*Address{
   408  				{
   409  					Name:    "Mary Smith",
   410  					Address: "mary@x.test",
   411  				},
   412  				{
   413  					Address: "jdoe@example.org",
   414  				},
   415  				{
   416  					Name:    "Who?",
   417  					Address: "one@y.test",
   418  				},
   419  			},
   420  		},
   421  		{
   422  			`<boss@nil.test>, "Giant; \"Big\" Box" <sysservices@example.net>`,
   423  			[]*Address{
   424  				{
   425  					Address: "boss@nil.test",
   426  				},
   427  				{
   428  					Name:    `Giant; "Big" Box`,
   429  					Address: "sysservices@example.net",
   430  				},
   431  			},
   432  		},
   433  		// RFC 5322, Appendix A.6.1
   434  		{
   435  			`Joe Q. Public <john.q.public@example.com>`,
   436  			[]*Address{{
   437  				Name:    "Joe Q. Public",
   438  				Address: "john.q.public@example.com",
   439  			}},
   440  		},
   441  		// RFC 5322, Appendix A.1.3
   442  		{
   443  			`group1: groupaddr1@example.com;`,
   444  			[]*Address{
   445  				{
   446  					Name:    "",
   447  					Address: "groupaddr1@example.com",
   448  				},
   449  			},
   450  		},
   451  		{
   452  			`empty group: ;`,
   453  			[]*Address(nil),
   454  		},
   455  		{
   456  			`A Group:Ed Jones <c@a.test>,joe@where.test,John <jdoe@one.test>;`,
   457  			[]*Address{
   458  				{
   459  					Name:    "Ed Jones",
   460  					Address: "c@a.test",
   461  				},
   462  				{
   463  					Name:    "",
   464  					Address: "joe@where.test",
   465  				},
   466  				{
   467  					Name:    "John",
   468  					Address: "jdoe@one.test",
   469  				},
   470  			},
   471  		},
   472  		// RFC5322 4.4 obs-addr-list
   473  		{
   474  			` , joe@where.test,,John <jdoe@one.test>,`,
   475  			[]*Address{
   476  				{
   477  					Name:    "",
   478  					Address: "joe@where.test",
   479  				},
   480  				{
   481  					Name:    "John",
   482  					Address: "jdoe@one.test",
   483  				},
   484  			},
   485  		},
   486  		{
   487  			` , joe@where.test,,John <jdoe@one.test>,,`,
   488  			[]*Address{
   489  				{
   490  					Name:    "",
   491  					Address: "joe@where.test",
   492  				},
   493  				{
   494  					Name:    "John",
   495  					Address: "jdoe@one.test",
   496  				},
   497  			},
   498  		},
   499  		{
   500  			`Group1: <addr1@example.com>;, Group 2: addr2@example.com;, John <addr3@example.com>`,
   501  			[]*Address{
   502  				{
   503  					Name:    "",
   504  					Address: "addr1@example.com",
   505  				},
   506  				{
   507  					Name:    "",
   508  					Address: "addr2@example.com",
   509  				},
   510  				{
   511  					Name:    "John",
   512  					Address: "addr3@example.com",
   513  				},
   514  			},
   515  		},
   516  		// RFC 2047 "Q"-encoded ISO-8859-1 address.
   517  		{
   518  			`=?iso-8859-1?q?J=F6rg_Doe?= <joerg@example.com>`,
   519  			[]*Address{
   520  				{
   521  					Name:    `Jörg Doe`,
   522  					Address: "joerg@example.com",
   523  				},
   524  			},
   525  		},
   526  		// RFC 2047 "Q"-encoded US-ASCII address. Dumb but legal.
   527  		{
   528  			`=?us-ascii?q?J=6Frg_Doe?= <joerg@example.com>`,
   529  			[]*Address{
   530  				{
   531  					Name:    `Jorg Doe`,
   532  					Address: "joerg@example.com",
   533  				},
   534  			},
   535  		},
   536  		// RFC 2047 "Q"-encoded UTF-8 address.
   537  		{
   538  			`=?utf-8?q?J=C3=B6rg_Doe?= <joerg@example.com>`,
   539  			[]*Address{
   540  				{
   541  					Name:    `Jörg Doe`,
   542  					Address: "joerg@example.com",
   543  				},
   544  			},
   545  		},
   546  		// RFC 2047 "Q"-encoded UTF-8 address with multiple encoded-words.
   547  		{
   548  			`=?utf-8?q?J=C3=B6rg?=  =?utf-8?q?Doe?= <joerg@example.com>`,
   549  			[]*Address{
   550  				{
   551  					Name:    `JörgDoe`,
   552  					Address: "joerg@example.com",
   553  				},
   554  			},
   555  		},
   556  		// RFC 2047, Section 8.
   557  		{
   558  			`=?ISO-8859-1?Q?Andr=E9?= Pirard <PIRARD@vm1.ulg.ac.be>`,
   559  			[]*Address{
   560  				{
   561  					Name:    `André Pirard`,
   562  					Address: "PIRARD@vm1.ulg.ac.be",
   563  				},
   564  			},
   565  		},
   566  		// Custom example of RFC 2047 "B"-encoded ISO-8859-1 address.
   567  		{
   568  			`=?ISO-8859-1?B?SvZyZw==?= <joerg@example.com>`,
   569  			[]*Address{
   570  				{
   571  					Name:    `Jörg`,
   572  					Address: "joerg@example.com",
   573  				},
   574  			},
   575  		},
   576  		// Custom example of RFC 2047 "B"-encoded UTF-8 address.
   577  		{
   578  			`=?UTF-8?B?SsO2cmc=?= <joerg@example.com>`,
   579  			[]*Address{
   580  				{
   581  					Name:    `Jörg`,
   582  					Address: "joerg@example.com",
   583  				},
   584  			},
   585  		},
   586  		// Custom example with "." in name. For issue 4938
   587  		{
   588  			`Asem H. <noreply@example.com>`,
   589  			[]*Address{
   590  				{
   591  					Name:    `Asem H.`,
   592  					Address: "noreply@example.com",
   593  				},
   594  			},
   595  		},
   596  		// RFC 6532 3.2.3, qtext /= UTF8-non-ascii
   597  		{
   598  			`"Gø Pher" <gopher@example.com>`,
   599  			[]*Address{
   600  				{
   601  					Name:    `Gø Pher`,
   602  					Address: "gopher@example.com",
   603  				},
   604  			},
   605  		},
   606  		// RFC 6532 3.2, atext /= UTF8-non-ascii
   607  		{
   608  			`µ <micro@example.com>`,
   609  			[]*Address{
   610  				{
   611  					Name:    `µ`,
   612  					Address: "micro@example.com",
   613  				},
   614  			},
   615  		},
   616  		// RFC 6532 3.2.2, local address parts allow UTF-8
   617  		{
   618  			`Micro <µ@example.com>`,
   619  			[]*Address{
   620  				{
   621  					Name:    `Micro`,
   622  					Address: "µ@example.com",
   623  				},
   624  			},
   625  		},
   626  		// RFC 6532 3.2.4, domains parts allow UTF-8
   627  		{
   628  			`Micro <micro@µ.example.com>`,
   629  			[]*Address{
   630  				{
   631  					Name:    `Micro`,
   632  					Address: "micro@µ.example.com",
   633  				},
   634  			},
   635  		},
   636  		// Issue 14866
   637  		{
   638  			`"" <emptystring@example.com>`,
   639  			[]*Address{
   640  				{
   641  					Name:    "",
   642  					Address: "emptystring@example.com",
   643  				},
   644  			},
   645  		},
   646  		// CFWS
   647  		{
   648  			`<cfws@example.com> (CFWS (cfws))  (another comment)`,
   649  			[]*Address{
   650  				{
   651  					Name:    "",
   652  					Address: "cfws@example.com",
   653  				},
   654  			},
   655  		},
   656  		{
   657  			`<cfws@example.com> ()  (another comment), <cfws2@example.com> (another)`,
   658  			[]*Address{
   659  				{
   660  					Name:    "",
   661  					Address: "cfws@example.com",
   662  				},
   663  				{
   664  					Name:    "",
   665  					Address: "cfws2@example.com",
   666  				},
   667  			},
   668  		},
   669  		// Comment as display name
   670  		{
   671  			`john@example.com (John Doe)`,
   672  			[]*Address{
   673  				{
   674  					Name:    "John Doe",
   675  					Address: "john@example.com",
   676  				},
   677  			},
   678  		},
   679  		// Comment and display name
   680  		{
   681  			`John Doe <john@example.com> (Joey)`,
   682  			[]*Address{
   683  				{
   684  					Name:    "John Doe",
   685  					Address: "john@example.com",
   686  				},
   687  			},
   688  		},
   689  		// Comment as display name, no space
   690  		{
   691  			`john@example.com(John Doe)`,
   692  			[]*Address{
   693  				{
   694  					Name:    "John Doe",
   695  					Address: "john@example.com",
   696  				},
   697  			},
   698  		},
   699  		// Comment as display name, Q-encoded
   700  		{
   701  			`asjo@example.com (Adam =?utf-8?Q?Sj=C3=B8gren?=)`,
   702  			[]*Address{
   703  				{
   704  					Name:    "Adam Sjøgren",
   705  					Address: "asjo@example.com",
   706  				},
   707  			},
   708  		},
   709  		// Comment as display name, Q-encoded and tab-separated
   710  		{
   711  			`asjo@example.com (Adam	=?utf-8?Q?Sj=C3=B8gren?=)`,
   712  			[]*Address{
   713  				{
   714  					Name:    "Adam Sjøgren",
   715  					Address: "asjo@example.com",
   716  				},
   717  			},
   718  		},
   719  		// Nested comment as display name, Q-encoded
   720  		{
   721  			`asjo@example.com (Adam =?utf-8?Q?Sj=C3=B8gren?= (Debian))`,
   722  			[]*Address{
   723  				{
   724  					Name:    "Adam Sjøgren (Debian)",
   725  					Address: "asjo@example.com",
   726  				},
   727  			},
   728  		},
   729  	}
   730  	for _, test := range tests {
   731  		if len(test.exp) == 1 {
   732  			addr, err := ParseAddress(test.addrsStr)
   733  			if err != nil {
   734  				t.Errorf("Failed parsing (single) %q: %v", test.addrsStr, err)
   735  				continue
   736  			}
   737  			if !reflect.DeepEqual([]*Address{addr}, test.exp) {
   738  				t.Errorf("Parse (single) of %q: got %+v, want %+v", test.addrsStr, addr, test.exp)
   739  			}
   740  		}
   741  
   742  		addrs, err := ParseAddressList(test.addrsStr)
   743  		if err != nil {
   744  			t.Errorf("Failed parsing (list) %q: %v", test.addrsStr, err)
   745  			continue
   746  		}
   747  		if !reflect.DeepEqual(addrs, test.exp) {
   748  			t.Errorf("Parse (list) of %q: got %+v, want %+v", test.addrsStr, addrs, test.exp)
   749  		}
   750  	}
   751  }
   752  
   753  func TestAddressParser(t *testing.T) {
   754  	tests := []struct {
   755  		addrsStr string
   756  		exp      []*Address
   757  	}{
   758  		// Bare address
   759  		{
   760  			`jdoe@machine.example`,
   761  			[]*Address{{
   762  				Address: "jdoe@machine.example",
   763  			}},
   764  		},
   765  		// RFC 5322, Appendix A.1.1
   766  		{
   767  			`John Doe <jdoe@machine.example>`,
   768  			[]*Address{{
   769  				Name:    "John Doe",
   770  				Address: "jdoe@machine.example",
   771  			}},
   772  		},
   773  		// RFC 5322, Appendix A.1.2
   774  		{
   775  			`"Joe Q. Public" <john.q.public@example.com>`,
   776  			[]*Address{{
   777  				Name:    "Joe Q. Public",
   778  				Address: "john.q.public@example.com",
   779  			}},
   780  		},
   781  		{
   782  			`Mary Smith <mary@x.test>, jdoe@example.org, Who? <one@y.test>`,
   783  			[]*Address{
   784  				{
   785  					Name:    "Mary Smith",
   786  					Address: "mary@x.test",
   787  				},
   788  				{
   789  					Address: "jdoe@example.org",
   790  				},
   791  				{
   792  					Name:    "Who?",
   793  					Address: "one@y.test",
   794  				},
   795  			},
   796  		},
   797  		{
   798  			`<boss@nil.test>, "Giant; \"Big\" Box" <sysservices@example.net>`,
   799  			[]*Address{
   800  				{
   801  					Address: "boss@nil.test",
   802  				},
   803  				{
   804  					Name:    `Giant; "Big" Box`,
   805  					Address: "sysservices@example.net",
   806  				},
   807  			},
   808  		},
   809  		// RFC 2047 "Q"-encoded ISO-8859-1 address.
   810  		{
   811  			`=?iso-8859-1?q?J=F6rg_Doe?= <joerg@example.com>`,
   812  			[]*Address{
   813  				{
   814  					Name:    `Jörg Doe`,
   815  					Address: "joerg@example.com",
   816  				},
   817  			},
   818  		},
   819  		// RFC 2047 "Q"-encoded US-ASCII address. Dumb but legal.
   820  		{
   821  			`=?us-ascii?q?J=6Frg_Doe?= <joerg@example.com>`,
   822  			[]*Address{
   823  				{
   824  					Name:    `Jorg Doe`,
   825  					Address: "joerg@example.com",
   826  				},
   827  			},
   828  		},
   829  		// RFC 2047 "Q"-encoded ISO-8859-15 address.
   830  		{
   831  			`=?ISO-8859-15?Q?J=F6rg_Doe?= <joerg@example.com>`,
   832  			[]*Address{
   833  				{
   834  					Name:    `Jörg Doe`,
   835  					Address: "joerg@example.com",
   836  				},
   837  			},
   838  		},
   839  		// RFC 2047 "B"-encoded windows-1252 address.
   840  		{
   841  			`=?windows-1252?q?Andr=E9?= Pirard <PIRARD@vm1.ulg.ac.be>`,
   842  			[]*Address{
   843  				{
   844  					Name:    `André Pirard`,
   845  					Address: "PIRARD@vm1.ulg.ac.be",
   846  				},
   847  			},
   848  		},
   849  		// Custom example of RFC 2047 "B"-encoded ISO-8859-15 address.
   850  		{
   851  			`=?ISO-8859-15?B?SvZyZw==?= <joerg@example.com>`,
   852  			[]*Address{
   853  				{
   854  					Name:    `Jörg`,
   855  					Address: "joerg@example.com",
   856  				},
   857  			},
   858  		},
   859  		// Custom example of RFC 2047 "B"-encoded UTF-8 address.
   860  		{
   861  			`=?UTF-8?B?SsO2cmc=?= <joerg@example.com>`,
   862  			[]*Address{
   863  				{
   864  					Name:    `Jörg`,
   865  					Address: "joerg@example.com",
   866  				},
   867  			},
   868  		},
   869  		// Custom example with "." in name. For issue 4938
   870  		{
   871  			`Asem H. <noreply@example.com>`,
   872  			[]*Address{
   873  				{
   874  					Name:    `Asem H.`,
   875  					Address: "noreply@example.com",
   876  				},
   877  			},
   878  		},
   879  	}
   880  
   881  	ap := AddressParser{WordDecoder: &mime.WordDecoder{
   882  		CharsetReader: func(charset string, input io.Reader) (io.Reader, error) {
   883  			in, err := io.ReadAll(input)
   884  			if err != nil {
   885  				return nil, err
   886  			}
   887  
   888  			switch charset {
   889  			case "iso-8859-15":
   890  				in = bytes.ReplaceAll(in, []byte("\xf6"), []byte("ö"))
   891  			case "windows-1252":
   892  				in = bytes.ReplaceAll(in, []byte("\xe9"), []byte("é"))
   893  			}
   894  
   895  			return bytes.NewReader(in), nil
   896  		},
   897  	}}
   898  
   899  	for _, test := range tests {
   900  		if len(test.exp) == 1 {
   901  			addr, err := ap.Parse(test.addrsStr)
   902  			if err != nil {
   903  				t.Errorf("Failed parsing (single) %q: %v", test.addrsStr, err)
   904  				continue
   905  			}
   906  			if !reflect.DeepEqual([]*Address{addr}, test.exp) {
   907  				t.Errorf("Parse (single) of %q: got %+v, want %+v", test.addrsStr, addr, test.exp)
   908  			}
   909  		}
   910  
   911  		addrs, err := ap.ParseList(test.addrsStr)
   912  		if err != nil {
   913  			t.Errorf("Failed parsing (list) %q: %v", test.addrsStr, err)
   914  			continue
   915  		}
   916  		if !reflect.DeepEqual(addrs, test.exp) {
   917  			t.Errorf("Parse (list) of %q: got %+v, want %+v", test.addrsStr, addrs, test.exp)
   918  		}
   919  	}
   920  }
   921  
   922  func TestAddressString(t *testing.T) {
   923  	tests := []struct {
   924  		addr *Address
   925  		exp  string
   926  	}{
   927  		{
   928  			&Address{Address: "bob@example.com"},
   929  			"<bob@example.com>",
   930  		},
   931  		{ // quoted local parts: RFC 5322, 3.4.1. and 3.2.4.
   932  			&Address{Address: `my@idiot@address@example.com`},
   933  			`<"my@idiot@address"@example.com>`,
   934  		},
   935  		{ // quoted local parts
   936  			&Address{Address: ` @example.com`},
   937  			`<" "@example.com>`,
   938  		},
   939  		{
   940  			&Address{Name: "Bob", Address: "bob@example.com"},
   941  			`"Bob" <bob@example.com>`,
   942  		},
   943  		{
   944  			// note the ö (o with an umlaut)
   945  			&Address{Name: "Böb", Address: "bob@example.com"},
   946  			`=?utf-8?q?B=C3=B6b?= <bob@example.com>`,
   947  		},
   948  		{
   949  			&Address{Name: "Bob Jane", Address: "bob@example.com"},
   950  			`"Bob Jane" <bob@example.com>`,
   951  		},
   952  		{
   953  			&Address{Name: "Böb Jacöb", Address: "bob@example.com"},
   954  			`=?utf-8?q?B=C3=B6b_Jac=C3=B6b?= <bob@example.com>`,
   955  		},
   956  		{ // https://golang.org/issue/12098
   957  			&Address{Name: "Rob", Address: ""},
   958  			`"Rob" <@>`,
   959  		},
   960  		{ // https://golang.org/issue/12098
   961  			&Address{Name: "Rob", Address: "@"},
   962  			`"Rob" <@>`,
   963  		},
   964  		{
   965  			&Address{Name: "Böb, Jacöb", Address: "bob@example.com"},
   966  			`=?utf-8?b?QsO2YiwgSmFjw7Zi?= <bob@example.com>`,
   967  		},
   968  		{
   969  			&Address{Name: "=??Q?x?=", Address: "hello@world.com"},
   970  			`"=??Q?x?=" <hello@world.com>`,
   971  		},
   972  		{
   973  			&Address{Name: "=?hello", Address: "hello@world.com"},
   974  			`"=?hello" <hello@world.com>`,
   975  		},
   976  		{
   977  			&Address{Name: "world?=", Address: "hello@world.com"},
   978  			`"world?=" <hello@world.com>`,
   979  		},
   980  		{
   981  			// should q-encode even for invalid utf-8.
   982  			&Address{Name: string([]byte{0xed, 0xa0, 0x80}), Address: "invalid-utf8@example.net"},
   983  			"=?utf-8?q?=ED=A0=80?= <invalid-utf8@example.net>",
   984  		},
   985  	}
   986  	for _, test := range tests {
   987  		s := test.addr.String()
   988  		if s != test.exp {
   989  			t.Errorf("Address%+v.String() = %v, want %v", *test.addr, s, test.exp)
   990  			continue
   991  		}
   992  
   993  		// Check round-trip.
   994  		if test.addr.Address != "" && test.addr.Address != "@" {
   995  			a, err := ParseAddress(test.exp)
   996  			if err != nil {
   997  				t.Errorf("ParseAddress(%#q): %v", test.exp, err)
   998  				continue
   999  			}
  1000  			if a.Name != test.addr.Name || a.Address != test.addr.Address {
  1001  				t.Errorf("ParseAddress(%#q) = %#v, want %#v", test.exp, a, test.addr)
  1002  			}
  1003  		}
  1004  	}
  1005  }
  1006  
  1007  // Check if all valid addresses can be parsed, formatted and parsed again
  1008  func TestAddressParsingAndFormatting(t *testing.T) {
  1009  
  1010  	// Should pass
  1011  	tests := []string{
  1012  		`<Bob@example.com>`,
  1013  		`<bob.bob@example.com>`,
  1014  		`<".bob"@example.com>`,
  1015  		`<" "@example.com>`,
  1016  		`<some.mail-with-dash@example.com>`,
  1017  		`<"dot.and space"@example.com>`,
  1018  		`<"very.unusual.@.unusual.com"@example.com>`,
  1019  		`<admin@mailserver1>`,
  1020  		`<postmaster@localhost>`,
  1021  		"<#!$%&'*+-/=?^_`{}|~@example.org>",
  1022  		`<"very.(),:;<>[]\".VERY.\"very@\\ \"very\".unusual"@strange.example.com>`, // escaped quotes
  1023  		`<"()<>[]:,;@\\\"!#$%&'*+-/=?^_{}| ~.a"@example.org>`,                      // escaped backslashes
  1024  		`<"Abc\\@def"@example.com>`,
  1025  		`<"Joe\\Blow"@example.com>`,
  1026  		`<test1/test2=test3@example.com>`,
  1027  		`<def!xyz%abc@example.com>`,
  1028  		`<_somename@example.com>`,
  1029  		`<joe@uk>`,
  1030  		`<~@example.com>`,
  1031  		`<"..."@test.com>`,
  1032  		`<"john..doe"@example.com>`,
  1033  		`<"john.doe."@example.com>`,
  1034  		`<".john.doe"@example.com>`,
  1035  		`<"."@example.com>`,
  1036  		`<".."@example.com>`,
  1037  		`<"0:"@0>`,
  1038  	}
  1039  
  1040  	for _, test := range tests {
  1041  		addr, err := ParseAddress(test)
  1042  		if err != nil {
  1043  			t.Errorf("Couldn't parse address %s: %s", test, err.Error())
  1044  			continue
  1045  		}
  1046  		str := addr.String()
  1047  		addr, err = ParseAddress(str)
  1048  		if err != nil {
  1049  			t.Errorf("ParseAddr(%q) error: %v", test, err)
  1050  			continue
  1051  		}
  1052  
  1053  		if addr.String() != test {
  1054  			t.Errorf("String() round-trip = %q; want %q", addr, test)
  1055  			continue
  1056  		}
  1057  
  1058  	}
  1059  
  1060  	// Should fail
  1061  	badTests := []string{
  1062  		`<Abc.example.com>`,
  1063  		`<A@b@c@example.com>`,
  1064  		`<a"b(c)d,e:f;g<h>i[j\k]l@example.com>`,
  1065  		`<just"not"right@example.com>`,
  1066  		`<this is"not\allowed@example.com>`,
  1067  		`<this\ still\"not\\allowed@example.com>`,
  1068  		`<john..doe@example.com>`,
  1069  		`<john.doe@example..com>`,
  1070  		`<john.doe@example..com>`,
  1071  		`<john.doe.@example.com>`,
  1072  		`<john.doe.@.example.com>`,
  1073  		`<.john.doe@example.com>`,
  1074  		`<@example.com>`,
  1075  		`<.@example.com>`,
  1076  		`<test@.>`,
  1077  		`< @example.com>`,
  1078  		`<""test""blah""@example.com>`,
  1079  		`<""@0>`,
  1080  	}
  1081  
  1082  	for _, test := range badTests {
  1083  		_, err := ParseAddress(test)
  1084  		if err == nil {
  1085  			t.Errorf("Should have failed to parse address: %s", test)
  1086  			continue
  1087  		}
  1088  
  1089  	}
  1090  
  1091  }
  1092  
  1093  func TestAddressFormattingAndParsing(t *testing.T) {
  1094  	tests := []*Address{
  1095  		{Name: "@lïce", Address: "alice@example.com"},
  1096  		{Name: "Böb O'Connor", Address: "bob@example.com"},
  1097  		{Name: "???", Address: "bob@example.com"},
  1098  		{Name: "Böb ???", Address: "bob@example.com"},
  1099  		{Name: "Böb (Jacöb)", Address: "bob@example.com"},
  1100  		{Name: "à#$%&'(),.:;<>@[]^`{|}~'", Address: "bob@example.com"},
  1101  		// https://golang.org/issue/11292
  1102  		{Name: "\"\\\x1f,\"", Address: "0@0"},
  1103  		// https://golang.org/issue/12782
  1104  		{Name: "naé, mée", Address: "test.mail@gmail.com"},
  1105  	}
  1106  
  1107  	for i, test := range tests {
  1108  		parsed, err := ParseAddress(test.String())
  1109  		if err != nil {
  1110  			t.Errorf("test #%d: ParseAddr(%q) error: %v", i, test.String(), err)
  1111  			continue
  1112  		}
  1113  		if parsed.Name != test.Name {
  1114  			t.Errorf("test #%d: Parsed name = %q; want %q", i, parsed.Name, test.Name)
  1115  		}
  1116  		if parsed.Address != test.Address {
  1117  			t.Errorf("test #%d: Parsed address = %q; want %q", i, parsed.Address, test.Address)
  1118  		}
  1119  	}
  1120  }
  1121  
  1122  func TestEmptyAddress(t *testing.T) {
  1123  	parsed, err := ParseAddress("")
  1124  	if parsed != nil || err == nil {
  1125  		t.Errorf(`ParseAddress("") = %v, %v, want nil, error`, parsed, err)
  1126  	}
  1127  	list, err := ParseAddressList("")
  1128  	if len(list) > 0 || err == nil {
  1129  		t.Errorf(`ParseAddressList("") = %v, %v, want nil, error`, list, err)
  1130  	}
  1131  	list, err = ParseAddressList(",")
  1132  	if len(list) > 0 || err == nil {
  1133  		t.Errorf(`ParseAddressList("") = %v, %v, want nil, error`, list, err)
  1134  	}
  1135  	list, err = ParseAddressList("a@b c@d")
  1136  	if len(list) > 0 || err == nil {
  1137  		t.Errorf(`ParseAddressList("") = %v, %v, want nil, error`, list, err)
  1138  	}
  1139  }
  1140  

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