Source file src/mime/mediatype_test.go

Documentation: mime

		 1  // Copyright 2010 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 mime
		 6  
		 7  import (
		 8  	"reflect"
		 9  	"strings"
		10  	"testing"
		11  )
		12  
		13  func TestConsumeToken(t *testing.T) {
		14  	tests := [...][3]string{
		15  		{"foo bar", "foo", " bar"},
		16  		{"bar", "bar", ""},
		17  		{"", "", ""},
		18  		{" foo", "", " foo"},
		19  	}
		20  	for _, test := range tests {
		21  		token, rest := consumeToken(test[0])
		22  		expectedToken := test[1]
		23  		expectedRest := test[2]
		24  		if token != expectedToken {
		25  			t.Errorf("expected to consume token '%s', not '%s' from '%s'",
		26  				expectedToken, token, test[0])
		27  		} else if rest != expectedRest {
		28  			t.Errorf("expected to have left '%s', not '%s' after reading token '%s' from '%s'",
		29  				expectedRest, rest, token, test[0])
		30  		}
		31  	}
		32  }
		33  
		34  func TestConsumeValue(t *testing.T) {
		35  	tests := [...][3]string{
		36  		{"foo bar", "foo", " bar"},
		37  		{"bar", "bar", ""},
		38  		{" bar ", "", " bar "},
		39  		{`"My value"end`, "My value", "end"},
		40  		{`"My value" end`, "My value", " end"},
		41  		{`"\\" rest`, "\\", " rest"},
		42  		{`"My \" value"end`, "My \" value", "end"},
		43  		{`"\" rest`, "", `"\" rest`},
		44  		{`"C:\dev\go\robots.txt"`, `C:\dev\go\robots.txt`, ""},
		45  		{`"C:\新建文件件\中文第二次测试.mp4"`, `C:\新建文件件\中文第二次测试.mp4`, ""},
		46  	}
		47  	for _, test := range tests {
		48  		value, rest := consumeValue(test[0])
		49  		expectedValue := test[1]
		50  		expectedRest := test[2]
		51  		if value != expectedValue {
		52  			t.Errorf("expected to consume value [%s], not [%s] from [%s]",
		53  				expectedValue, value, test[0])
		54  		} else if rest != expectedRest {
		55  			t.Errorf("expected to have left [%s], not [%s] after reading value [%s] from [%s]",
		56  				expectedRest, rest, value, test[0])
		57  		}
		58  	}
		59  }
		60  
		61  func TestConsumeMediaParam(t *testing.T) {
		62  	tests := [...][4]string{
		63  		{" ; foo=bar", "foo", "bar", ""},
		64  		{"; foo=bar", "foo", "bar", ""},
		65  		{";foo=bar", "foo", "bar", ""},
		66  		{";FOO=bar", "foo", "bar", ""},
		67  		{`;foo="bar"`, "foo", "bar", ""},
		68  		{`;foo="bar"; `, "foo", "bar", "; "},
		69  		{`;foo="bar"; foo=baz`, "foo", "bar", "; foo=baz"},
		70  		{` ; boundary=----CUT;`, "boundary", "----CUT", ";"},
		71  		{` ; key=value;	blah="value";name="foo" `, "key", "value", `;	blah="value";name="foo" `},
		72  		{`;	blah="value";name="foo" `, "blah", "value", `;name="foo" `},
		73  		{`;name="foo" `, "name", "foo", ` `},
		74  	}
		75  	for _, test := range tests {
		76  		param, value, rest := consumeMediaParam(test[0])
		77  		expectedParam := test[1]
		78  		expectedValue := test[2]
		79  		expectedRest := test[3]
		80  		if param != expectedParam {
		81  			t.Errorf("expected to consume param [%s], not [%s] from [%s]",
		82  				expectedParam, param, test[0])
		83  		} else if value != expectedValue {
		84  			t.Errorf("expected to consume value [%s], not [%s] from [%s]",
		85  				expectedValue, value, test[0])
		86  		} else if rest != expectedRest {
		87  			t.Errorf("expected to have left [%s], not [%s] after reading [%s/%s] from [%s]",
		88  				expectedRest, rest, param, value, test[0])
		89  		}
		90  	}
		91  }
		92  
		93  type mediaTypeTest struct {
		94  	in string
		95  	t	string
		96  	p	map[string]string
		97  }
		98  
		99  func TestParseMediaType(t *testing.T) {
	 100  	// Convenience map initializer
	 101  	m := func(s ...string) map[string]string {
	 102  		sm := make(map[string]string)
	 103  		for i := 0; i < len(s); i += 2 {
	 104  			sm[s[i]] = s[i+1]
	 105  		}
	 106  		return sm
	 107  	}
	 108  
	 109  	nameFoo := map[string]string{"name": "foo"}
	 110  	tests := []mediaTypeTest{
	 111  		{`form-data; name="foo"`, "form-data", nameFoo},
	 112  		{` form-data ; name=foo`, "form-data", nameFoo},
	 113  		{`FORM-DATA;name="foo"`, "form-data", nameFoo},
	 114  		{` FORM-DATA ; name="foo"`, "form-data", nameFoo},
	 115  		{` FORM-DATA ; name="foo"`, "form-data", nameFoo},
	 116  
	 117  		{`form-data; key=value;	blah="value";name="foo" `,
	 118  			"form-data",
	 119  			m("key", "value", "blah", "value", "name", "foo")},
	 120  
	 121  		{`foo; key=val1; key=the-key-appears-again-which-is-bogus`,
	 122  			"", m()},
	 123  
	 124  		// From RFC 2231:
	 125  		{`application/x-stuff; title*=us-ascii'en-us'This%20is%20%2A%2A%2Afun%2A%2A%2A`,
	 126  			"application/x-stuff",
	 127  			m("title", "This is ***fun***")},
	 128  
	 129  		{`message/external-body; access-type=URL; ` +
	 130  			`URL*0="ftp://";` +
	 131  			`URL*1="cs.utk.edu/pub/moore/bulk-mailer/bulk-mailer.tar"`,
	 132  			"message/external-body",
	 133  			m("access-type", "URL",
	 134  				"url", "ftp://cs.utk.edu/pub/moore/bulk-mailer/bulk-mailer.tar")},
	 135  
	 136  		{`application/x-stuff; ` +
	 137  			`title*0*=us-ascii'en'This%20is%20even%20more%20; ` +
	 138  			`title*1*=%2A%2A%2Afun%2A%2A%2A%20; ` +
	 139  			`title*2="isn't it!"`,
	 140  			"application/x-stuff",
	 141  			m("title", "This is even more ***fun*** isn't it!")},
	 142  
	 143  		// Tests from http://greenbytes.de/tech/tc2231/
	 144  		// Note: Backslash escape handling is a bit loose, like MSIE.
	 145  
	 146  		// #attonly
	 147  		{`attachment`,
	 148  			"attachment",
	 149  			m()},
	 150  		// #attonlyucase
	 151  		{`ATTACHMENT`,
	 152  			"attachment",
	 153  			m()},
	 154  		// #attwithasciifilename
	 155  		{`attachment; filename="foo.html"`,
	 156  			"attachment",
	 157  			m("filename", "foo.html")},
	 158  		// #attwithasciifilename25
	 159  		{`attachment; filename="0000000000111111111122222"`,
	 160  			"attachment",
	 161  			m("filename", "0000000000111111111122222")},
	 162  		// #attwithasciifilename35
	 163  		{`attachment; filename="00000000001111111111222222222233333"`,
	 164  			"attachment",
	 165  			m("filename", "00000000001111111111222222222233333")},
	 166  		// #attwithasciifnescapedchar
	 167  		{`attachment; filename="f\oo.html"`,
	 168  			"attachment",
	 169  			m("filename", "f\\oo.html")},
	 170  		// #attwithasciifnescapedquote
	 171  		{`attachment; filename="\"quoting\" tested.html"`,
	 172  			"attachment",
	 173  			m("filename", `"quoting" tested.html`)},
	 174  		// #attwithquotedsemicolon
	 175  		{`attachment; filename="Here's a semicolon;.html"`,
	 176  			"attachment",
	 177  			m("filename", "Here's a semicolon;.html")},
	 178  		// #attwithfilenameandextparam
	 179  		{`attachment; foo="bar"; filename="foo.html"`,
	 180  			"attachment",
	 181  			m("foo", "bar", "filename", "foo.html")},
	 182  		// #attwithfilenameandextparamescaped
	 183  		{`attachment; foo="\"\\";filename="foo.html"`,
	 184  			"attachment",
	 185  			m("foo", "\"\\", "filename", "foo.html")},
	 186  		// #attwithasciifilenameucase
	 187  		{`attachment; FILENAME="foo.html"`,
	 188  			"attachment",
	 189  			m("filename", "foo.html")},
	 190  		// #attwithasciifilenamenq
	 191  		{`attachment; filename=foo.html`,
	 192  			"attachment",
	 193  			m("filename", "foo.html")},
	 194  		// #attwithasciifilenamenqs
	 195  		{`attachment; filename=foo.html ;`,
	 196  			"attachment",
	 197  			m("filename", "foo.html")},
	 198  		// #attwithfntokensq
	 199  		{`attachment; filename='foo.html'`,
	 200  			"attachment",
	 201  			m("filename", "'foo.html'")},
	 202  		// #attwithisofnplain
	 203  		{`attachment; filename="foo-ä.html"`,
	 204  			"attachment",
	 205  			m("filename", "foo-ä.html")},
	 206  		// #attwithutf8fnplain
	 207  		{`attachment; filename="foo-ä.html"`,
	 208  			"attachment",
	 209  			m("filename", "foo-ä.html")},
	 210  		// #attwithfnrawpctenca
	 211  		{`attachment; filename="foo-%41.html"`,
	 212  			"attachment",
	 213  			m("filename", "foo-%41.html")},
	 214  		// #attwithfnusingpct
	 215  		{`attachment; filename="50%.html"`,
	 216  			"attachment",
	 217  			m("filename", "50%.html")},
	 218  		// #attwithfnrawpctencaq
	 219  		{`attachment; filename="foo-%\41.html"`,
	 220  			"attachment",
	 221  			m("filename", "foo-%\\41.html")},
	 222  		// #attwithnamepct
	 223  		{`attachment; name="foo-%41.html"`,
	 224  			"attachment",
	 225  			m("name", "foo-%41.html")},
	 226  		// #attwithfilenamepctandiso
	 227  		{`attachment; name="ä-%41.html"`,
	 228  			"attachment",
	 229  			m("name", "ä-%41.html")},
	 230  		// #attwithfnrawpctenclong
	 231  		{`attachment; filename="foo-%c3%a4-%e2%82%ac.html"`,
	 232  			"attachment",
	 233  			m("filename", "foo-%c3%a4-%e2%82%ac.html")},
	 234  		// #attwithasciifilenamews1
	 235  		{`attachment; filename ="foo.html"`,
	 236  			"attachment",
	 237  			m("filename", "foo.html")},
	 238  		// #attmissingdisposition
	 239  		{`filename=foo.html`,
	 240  			"", m()},
	 241  		// #attmissingdisposition2
	 242  		{`x=y; filename=foo.html`,
	 243  			"", m()},
	 244  		// #attmissingdisposition3
	 245  		{`"foo; filename=bar;baz"; filename=qux`,
	 246  			"", m()},
	 247  		// #attmissingdisposition4
	 248  		{`filename=foo.html, filename=bar.html`,
	 249  			"", m()},
	 250  		// #emptydisposition
	 251  		{`; filename=foo.html`,
	 252  			"", m()},
	 253  		// #doublecolon
	 254  		{`: inline; attachment; filename=foo.html`,
	 255  			"", m()},
	 256  		// #attandinline
	 257  		{`inline; attachment; filename=foo.html`,
	 258  			"", m()},
	 259  		// #attandinline2
	 260  		{`attachment; inline; filename=foo.html`,
	 261  			"", m()},
	 262  		// #attbrokenquotedfn
	 263  		{`attachment; filename="foo.html".txt`,
	 264  			"", m()},
	 265  		// #attbrokenquotedfn2
	 266  		{`attachment; filename="bar`,
	 267  			"", m()},
	 268  		// #attbrokenquotedfn3
	 269  		{`attachment; filename=foo"bar;baz"qux`,
	 270  			"", m()},
	 271  		// #attmultinstances
	 272  		{`attachment; filename=foo.html, attachment; filename=bar.html`,
	 273  			"", m()},
	 274  		// #attmissingdelim
	 275  		{`attachment; foo=foo filename=bar`,
	 276  			"", m()},
	 277  		// #attmissingdelim2
	 278  		{`attachment; filename=bar foo=foo`,
	 279  			"", m()},
	 280  		// #attmissingdelim3
	 281  		{`attachment filename=bar`,
	 282  			"", m()},
	 283  		// #attreversed
	 284  		{`filename=foo.html; attachment`,
	 285  			"", m()},
	 286  		// #attconfusedparam
	 287  		{`attachment; xfilename=foo.html`,
	 288  			"attachment",
	 289  			m("xfilename", "foo.html")},
	 290  		// #attcdate
	 291  		{`attachment; creation-date="Wed, 12 Feb 1997 16:29:51 -0500"`,
	 292  			"attachment",
	 293  			m("creation-date", "Wed, 12 Feb 1997 16:29:51 -0500")},
	 294  		// #attmdate
	 295  		{`attachment; modification-date="Wed, 12 Feb 1997 16:29:51 -0500"`,
	 296  			"attachment",
	 297  			m("modification-date", "Wed, 12 Feb 1997 16:29:51 -0500")},
	 298  		// #dispext
	 299  		{`foobar`, "foobar", m()},
	 300  		// #dispextbadfn
	 301  		{`attachment; example="filename=example.txt"`,
	 302  			"attachment",
	 303  			m("example", "filename=example.txt")},
	 304  		// #attwithfn2231utf8
	 305  		{`attachment; filename*=UTF-8''foo-%c3%a4-%e2%82%ac.html`,
	 306  			"attachment",
	 307  			m("filename", "foo-ä-€.html")},
	 308  		// #attwithfn2231noc
	 309  		{`attachment; filename*=''foo-%c3%a4-%e2%82%ac.html`,
	 310  			"attachment",
	 311  			m()},
	 312  		// #attwithfn2231utf8comp
	 313  		{`attachment; filename*=UTF-8''foo-a%cc%88.html`,
	 314  			"attachment",
	 315  			m("filename", "foo-ä.html")},
	 316  		// #attwithfn2231ws2
	 317  		{`attachment; filename*= UTF-8''foo-%c3%a4.html`,
	 318  			"attachment",
	 319  			m("filename", "foo-ä.html")},
	 320  		// #attwithfn2231ws3
	 321  		{`attachment; filename* =UTF-8''foo-%c3%a4.html`,
	 322  			"attachment",
	 323  			m("filename", "foo-ä.html")},
	 324  		// #attwithfn2231quot
	 325  		{`attachment; filename*="UTF-8''foo-%c3%a4.html"`,
	 326  			"attachment",
	 327  			m("filename", "foo-ä.html")},
	 328  		// #attwithfn2231quot2
	 329  		{`attachment; filename*="foo%20bar.html"`,
	 330  			"attachment",
	 331  			m()},
	 332  		// #attwithfn2231singleqmissing
	 333  		{`attachment; filename*=UTF-8'foo-%c3%a4.html`,
	 334  			"attachment",
	 335  			m()},
	 336  		// #attwithfn2231nbadpct1
	 337  		{`attachment; filename*=UTF-8''foo%`,
	 338  			"attachment",
	 339  			m()},
	 340  		// #attwithfn2231nbadpct2
	 341  		{`attachment; filename*=UTF-8''f%oo.html`,
	 342  			"attachment",
	 343  			m()},
	 344  		// #attwithfn2231dpct
	 345  		{`attachment; filename*=UTF-8''A-%2541.html`,
	 346  			"attachment",
	 347  			m("filename", "A-%41.html")},
	 348  		// #attfncont
	 349  		{`attachment; filename*0="foo."; filename*1="html"`,
	 350  			"attachment",
	 351  			m("filename", "foo.html")},
	 352  		// #attfncontenc
	 353  		{`attachment; filename*0*=UTF-8''foo-%c3%a4; filename*1=".html"`,
	 354  			"attachment",
	 355  			m("filename", "foo-ä.html")},
	 356  		// #attfncontlz
	 357  		{`attachment; filename*0="foo"; filename*01="bar"`,
	 358  			"attachment",
	 359  			m("filename", "foo")},
	 360  		// #attfncontnc
	 361  		{`attachment; filename*0="foo"; filename*2="bar"`,
	 362  			"attachment",
	 363  			m("filename", "foo")},
	 364  		// #attfnconts1
	 365  		{`attachment; filename*1="foo."; filename*2="html"`,
	 366  			"attachment", m()},
	 367  		// #attfncontord
	 368  		{`attachment; filename*1="bar"; filename*0="foo"`,
	 369  			"attachment",
	 370  			m("filename", "foobar")},
	 371  		// #attfnboth
	 372  		{`attachment; filename="foo-ae.html"; filename*=UTF-8''foo-%c3%a4.html`,
	 373  			"attachment",
	 374  			m("filename", "foo-ä.html")},
	 375  		// #attfnboth2
	 376  		{`attachment; filename*=UTF-8''foo-%c3%a4.html; filename="foo-ae.html"`,
	 377  			"attachment",
	 378  			m("filename", "foo-ä.html")},
	 379  		// #attfnboth3
	 380  		{`attachment; filename*0*=ISO-8859-15''euro-sign%3d%a4; filename*=ISO-8859-1''currency-sign%3d%a4`,
	 381  			"attachment",
	 382  			m()},
	 383  		// #attnewandfn
	 384  		{`attachment; foobar=x; filename="foo.html"`,
	 385  			"attachment",
	 386  			m("foobar", "x", "filename", "foo.html")},
	 387  
	 388  		// Browsers also just send UTF-8 directly without RFC 2231,
	 389  		// at least when the source page is served with UTF-8.
	 390  		{`form-data; firstname="Брэд"; lastname="Фицпатрик"`,
	 391  			"form-data",
	 392  			m("firstname", "Брэд", "lastname", "Фицпатрик")},
	 393  
	 394  		// Empty string used to be mishandled.
	 395  		{`foo; bar=""`, "foo", m("bar", "")},
	 396  
	 397  		// Microsoft browers in intranet mode do not think they need to escape \ in file name.
	 398  		{`form-data; name="file"; filename="C:\dev\go\robots.txt"`, "form-data", m("name", "file", "filename", `C:\dev\go\robots.txt`)},
	 399  		{`form-data; name="file"; filename="C:\新建文件件\中文第二次测试.mp4"`, "form-data", m("name", "file", "filename", `C:\新建文件件\中文第二次测试.mp4`)},
	 400  	}
	 401  	for _, test := range tests {
	 402  		mt, params, err := ParseMediaType(test.in)
	 403  		if err != nil {
	 404  			if test.t != "" {
	 405  				t.Errorf("for input %#q, unexpected error: %v", test.in, err)
	 406  				continue
	 407  			}
	 408  			continue
	 409  		}
	 410  		if g, e := mt, test.t; g != e {
	 411  			t.Errorf("for input %#q, expected type %q, got %q",
	 412  				test.in, e, g)
	 413  			continue
	 414  		}
	 415  		if len(params) == 0 && len(test.p) == 0 {
	 416  			continue
	 417  		}
	 418  		if !reflect.DeepEqual(params, test.p) {
	 419  			t.Errorf("for input %#q, wrong params.\n"+
	 420  				"expected: %#v\n"+
	 421  				"		 got: %#v",
	 422  				test.in, test.p, params)
	 423  		}
	 424  	}
	 425  }
	 426  
	 427  type badMediaTypeTest struct {
	 428  	in	string
	 429  	mt	string
	 430  	err string
	 431  }
	 432  
	 433  var badMediaTypeTests = []badMediaTypeTest{
	 434  	{"bogus ;=========", "bogus", "mime: invalid media parameter"},
	 435  	// The following example is from real email delivered by gmail (error: missing semicolon)
	 436  	// and it is there to check behavior described in #19498
	 437  	{"application/pdf; x-mac-type=\"3F3F3F3F\"; x-mac-creator=\"3F3F3F3F\" name=\"a.pdf\";",
	 438  		"application/pdf", "mime: invalid media parameter"},
	 439  	{"bogus/<script>alert</script>", "", "mime: expected token after slash"},
	 440  	{"bogus/bogus<script>alert</script>", "", "mime: unexpected content after media subtype"},
	 441  	// Tests from http://greenbytes.de/tech/tc2231/
	 442  	{`"attachment"`, "attachment", "mime: no media type"},
	 443  	{"attachment; filename=foo,bar.html", "attachment", "mime: invalid media parameter"},
	 444  	{"attachment; ;filename=foo", "attachment", "mime: invalid media parameter"},
	 445  	{"attachment; filename=foo bar.html", "attachment", "mime: invalid media parameter"},
	 446  	{`attachment; filename="foo.html"; filename="bar.html"`, "attachment", "mime: duplicate parameter name"},
	 447  	{"attachment; filename=foo[1](2).html", "attachment", "mime: invalid media parameter"},
	 448  	{"attachment; filename=foo-ä.html", "attachment", "mime: invalid media parameter"},
	 449  	{"attachment; filename=foo-ä.html", "attachment", "mime: invalid media parameter"},
	 450  	{`attachment; filename *=UTF-8''foo-%c3%a4.html`, "attachment", "mime: invalid media parameter"},
	 451  }
	 452  
	 453  func TestParseMediaTypeBogus(t *testing.T) {
	 454  	for _, tt := range badMediaTypeTests {
	 455  		mt, params, err := ParseMediaType(tt.in)
	 456  		if err == nil {
	 457  			t.Errorf("ParseMediaType(%q) = nil error; want parse error", tt.in)
	 458  			continue
	 459  		}
	 460  		if err.Error() != tt.err {
	 461  			t.Errorf("ParseMediaType(%q) = err %q; want %q", tt.in, err.Error(), tt.err)
	 462  		}
	 463  		if params != nil {
	 464  			t.Errorf("ParseMediaType(%q): got non-nil params on error", tt.in)
	 465  		}
	 466  		if err != ErrInvalidMediaParameter && mt != "" {
	 467  			t.Errorf("ParseMediaType(%q): got unexpected non-empty media type string", tt.in)
	 468  		}
	 469  		if err == ErrInvalidMediaParameter && mt != tt.mt {
	 470  			t.Errorf("ParseMediaType(%q): in case of invalid parameters: expected type %q, got %q", tt.in, tt.mt, mt)
	 471  		}
	 472  	}
	 473  }
	 474  
	 475  type formatTest struct {
	 476  	typ		string
	 477  	params map[string]string
	 478  	want	 string
	 479  }
	 480  
	 481  var formatTests = []formatTest{
	 482  	{"noslash", map[string]string{"X": "Y"}, "noslash; x=Y"}, // e.g. Content-Disposition values (RFC 2183); issue 11289
	 483  	{"foo bar/baz", nil, ""},
	 484  	{"foo/bar baz", nil, ""},
	 485  	{"attachment", map[string]string{"filename": "ĄĄŽŽČČŠŠ"}, "attachment; filename*=utf-8''%C4%84%C4%84%C5%BD%C5%BD%C4%8C%C4%8C%C5%A0%C5%A0"},
	 486  	{"attachment", map[string]string{"filename": "ÁÁÊÊÇÇÎÎ"}, "attachment; filename*=utf-8''%C3%81%C3%81%C3%8A%C3%8A%C3%87%C3%87%C3%8E%C3%8E"},
	 487  	{"attachment", map[string]string{"filename": "数据统计.png"}, "attachment; filename*=utf-8''%E6%95%B0%E6%8D%AE%E7%BB%9F%E8%AE%A1.png"},
	 488  	{"foo/BAR", nil, "foo/bar"},
	 489  	{"foo/BAR", map[string]string{"X": "Y"}, "foo/bar; x=Y"},
	 490  	{"foo/BAR", map[string]string{"space": "With space"}, `foo/bar; space="With space"`},
	 491  	{"foo/BAR", map[string]string{"quote": `With "quote`}, `foo/bar; quote="With \"quote"`},
	 492  	{"foo/BAR", map[string]string{"bslash": `With \backslash`}, `foo/bar; bslash="With \\backslash"`},
	 493  	{"foo/BAR", map[string]string{"both": `With \backslash and "quote`}, `foo/bar; both="With \\backslash and \"quote"`},
	 494  	{"foo/BAR", map[string]string{"": "empty attribute"}, ""},
	 495  	{"foo/BAR", map[string]string{"bad attribute": "baz"}, ""},
	 496  	{"foo/BAR", map[string]string{"nonascii": "not an ascii character: ä"}, "foo/bar; nonascii*=utf-8''not%20an%20ascii%20character%3A%20%C3%A4"},
	 497  	{"foo/BAR", map[string]string{"ctl": "newline: \n nil: \000"}, "foo/bar; ctl*=utf-8''newline%3A%20%0A%20nil%3A%20%00"},
	 498  	{"foo/bar", map[string]string{"a": "av", "b": "bv", "c": "cv"}, "foo/bar; a=av; b=bv; c=cv"},
	 499  	{"foo/bar", map[string]string{"0": "'", "9": "'"}, "foo/bar; 0='; 9='"},
	 500  	{"foo", map[string]string{"bar": ""}, `foo; bar=""`},
	 501  }
	 502  
	 503  func TestFormatMediaType(t *testing.T) {
	 504  	for i, tt := range formatTests {
	 505  		got := FormatMediaType(tt.typ, tt.params)
	 506  		if got != tt.want {
	 507  			t.Errorf("%d. FormatMediaType(%q, %v) = %q; want %q", i, tt.typ, tt.params, got, tt.want)
	 508  		}
	 509  		if got == "" {
	 510  			continue
	 511  		}
	 512  		typ, params, err := ParseMediaType(got)
	 513  		if err != nil {
	 514  			t.Errorf("%d. ParseMediaType(%q) err: %v", i, got, err)
	 515  		}
	 516  		if typ != strings.ToLower(tt.typ) {
	 517  			t.Errorf("%d. ParseMediaType(%q) typ = %q; want %q", i, got, typ, tt.typ)
	 518  		}
	 519  		for k, v := range tt.params {
	 520  			k = strings.ToLower(k)
	 521  			if params[k] != v {
	 522  				t.Errorf("%d. ParseMediaType(%q) params[%s] = %q; want %q", i, got, k, params[k], v)
	 523  			}
	 524  		}
	 525  	}
	 526  }
	 527  

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