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.
14 func setMimeInit(fn func()) (cleanup func()) {
23 func clearMimeTypes() {
24 setMimeTypes(map[string]string{}, map[string]string{})
27 func setType(ext, typ string) {
28 if !strings.HasPrefix(ext, ".") {
29 panic("missing leading dot")
31 if err := setExtensionType(ext, typ); err != nil {
32 panic("bad test data: " + err.Error())
36 func TestTypeByExtension(t *testing.T) {
38 // initMimeForTests returns the platform-specific extension =>
39 // type tests. On Unix and Plan 9, this also tests the parsing
40 // of MIME text files (in testdata/*). On Windows, we test the
41 // real registry on the machine and assume that ".png" exists
42 // there, which empirically it always has, for all versions of
44 typeTests := initMimeForTests()
46 for ext, want := range typeTests {
47 val := TypeByExtension(ext)
49 t.Errorf("TypeByExtension(%q) = %q, want %q", ext, val, want)
54 func TestTypeByExtension_LocalData(t *testing.T) {
55 cleanup := setMimeInit(func() {
57 setType(".foo", "x/foo")
58 setType(".bar", "x/bar")
59 setType(".Bar", "x/bar; capital=1")
63 tests := map[string]string{
66 ".Bar": "x/bar; capital=1",
68 ".t1": "", // testdata shouldn't be used
71 for ext, want := range tests {
72 val := TypeByExtension(ext)
74 t.Errorf("TypeByExtension(%q) = %q, want %q", ext, val, want)
79 func TestTypeByExtensionCase(t *testing.T) {
80 const custom = "test/test; charset=iso-8859-1"
81 const caps = "test/test; WAS=ALLCAPS"
83 cleanup := setMimeInit(func() {
85 setType(".TEST", caps)
86 setType(".tesT", custom)
90 // case-sensitive lookup
91 if got := TypeByExtension(".tesT"); got != custom {
92 t.Fatalf("for .tesT, got %q; want %q", got, custom)
94 if got := TypeByExtension(".TEST"); got != caps {
95 t.Fatalf("for .TEST, got %q; want %s", got, caps)
99 if got := TypeByExtension(".TesT"); got != custom {
100 t.Fatalf("for .TesT, got %q; want %q", got, custom)
104 func TestExtensionsByType(t *testing.T) {
105 cleanup := setMimeInit(func() {
107 setType(".gif", "image/gif")
108 setType(".a", "foo/letter")
109 setType(".b", "foo/letter")
110 setType(".B", "foo/letter")
111 setType(".PNG", "image/png")
120 {typ: "image/gif", want: []string{".gif"}},
121 {typ: "image/png", want: []string{".png"}}, // lowercase
122 {typ: "foo/letter", want: []string{".a", ".b"}},
123 {typ: "x/unknown", want: nil},
126 for _, tt := range tests {
127 got, err := ExtensionsByType(tt.typ)
128 if err != nil && tt.wantErr != "" && strings.Contains(err.Error(), tt.wantErr) {
132 t.Errorf("ExtensionsByType(%q) error: %v", tt.typ, err)
135 if tt.wantErr != "" {
136 t.Errorf("ExtensionsByType(%q) = %q, %v; want error substring %q", tt.typ, got, err, tt.wantErr)
139 if !reflect.DeepEqual(got, tt.want) {
140 t.Errorf("ExtensionsByType(%q) = %q; want %q", tt.typ, got, tt.want)
145 func TestLookupMallocs(t *testing.T) {
146 n := testing.AllocsPerRun(10000, func() {
147 TypeByExtension(".html")
148 TypeByExtension(".HtML")
151 t.Errorf("allocs = %v; want 0", n)
155 func BenchmarkTypeByExtension(b *testing.B) {
159 for _, ext := range []string{
164 b.Run(ext, func(b *testing.B) {
165 b.RunParallel(func(pb *testing.PB) {
174 func BenchmarkExtensionsByType(b *testing.B) {
178 for _, typ := range []string{
180 "text/html; charset=utf-8",
181 "application/octet-stream",
183 b.Run(typ, func(b *testing.B) {
184 b.RunParallel(func(pb *testing.PB) {
186 if _, err := ExtensionsByType(typ); err != nil {
195 func TestExtensionsByType2(t *testing.T) {
196 cleanup := setMimeInit(func() {
198 // Initialize built-in types like in type.go before osInitMime.
199 setMimeTypes(builtinTypesLower, builtinTypesLower)
207 {typ: "image/jpeg", want: []string{".jpeg", ".jpg"}},
210 for _, tt := range tests {
211 got, err := ExtensionsByType(tt.typ)
213 t.Errorf("ExtensionsByType(%q): %v", tt.typ, err)
216 if !reflect.DeepEqual(got, tt.want) {
217 t.Errorf("ExtensionsByType(%q) = %q; want %q", tt.typ, got, tt.want)