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// Copyright 2010 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 (
"reflect"
"strings"
"sync"
"testing"
)
func setMimeInit(fn func()) (cleanup func()) {
once = sync.Once{}
testInitMime = fn
return func() {
testInitMime = nil
once = sync.Once{}
}
}
func clearMimeTypes() {
setMimeTypes(map[string]string{}, map[string]string{})
}
func setType(ext, typ string) {
if !strings.HasPrefix(ext, ".") {
panic("missing leading dot")
}
if err := setExtensionType(ext, typ); err != nil {
panic("bad test data: " + err.Error())
}
}
func TestTypeByExtension(t *testing.T) {
once = sync.Once{}
// initMimeForTests returns the platform-specific extension =>
// type tests. On Unix and Plan 9, this also tests the parsing
// of MIME text files (in testdata/*). On Windows, we test the
// real registry on the machine and assume that ".png" exists
// there, which empirically it always has, for all versions of
// Windows.
typeTests := initMimeForTests()
for ext, want := range typeTests {
val := TypeByExtension(ext)
if val != want {
t.Errorf("TypeByExtension(%q) = %q, want %q", ext, val, want)
}
}
}
func TestTypeByExtension_LocalData(t *testing.T) {
cleanup := setMimeInit(func() {
clearMimeTypes()
setType(".foo", "x/foo")
setType(".bar", "x/bar")
setType(".Bar", "x/bar; capital=1")
})
defer cleanup()
tests := map[string]string{
".foo": "x/foo",
".bar": "x/bar",
".Bar": "x/bar; capital=1",
".sdlkfjskdlfj": "",
".t1": "", // testdata shouldn't be used
}
for ext, want := range tests {
val := TypeByExtension(ext)
if val != want {
t.Errorf("TypeByExtension(%q) = %q, want %q", ext, val, want)
}
}
}
func TestTypeByExtensionCase(t *testing.T) {
const custom = "test/test; charset=iso-8859-1"
const caps = "test/test; WAS=ALLCAPS"
cleanup := setMimeInit(func() {
clearMimeTypes()
setType(".TEST", caps)
setType(".tesT", custom)
})
defer cleanup()
// case-sensitive lookup
if got := TypeByExtension(".tesT"); got != custom {
t.Fatalf("for .tesT, got %q; want %q", got, custom)
}
if got := TypeByExtension(".TEST"); got != caps {
t.Fatalf("for .TEST, got %q; want %s", got, caps)
}
// case-insensitive
if got := TypeByExtension(".TesT"); got != custom {
t.Fatalf("for .TesT, got %q; want %q", got, custom)
}
}
func TestExtensionsByType(t *testing.T) {
cleanup := setMimeInit(func() {
clearMimeTypes()
setType(".gif", "image/gif")
setType(".a", "foo/letter")
setType(".b", "foo/letter")
setType(".B", "foo/letter")
setType(".PNG", "image/png")
})
defer cleanup()
tests := []struct {
typ string
want []string
wantErr string
}{
{typ: "image/gif", want: []string{".gif"}},
{typ: "image/png", want: []string{".png"}}, // lowercase
{typ: "foo/letter", want: []string{".a", ".b"}},
{typ: "x/unknown", want: nil},
}
for _, tt := range tests {
got, err := ExtensionsByType(tt.typ)
if err != nil && tt.wantErr != "" && strings.Contains(err.Error(), tt.wantErr) {
continue
}
if err != nil {
t.Errorf("ExtensionsByType(%q) error: %v", tt.typ, err)
continue
}
if tt.wantErr != "" {
t.Errorf("ExtensionsByType(%q) = %q, %v; want error substring %q", tt.typ, got, err, tt.wantErr)
continue
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("ExtensionsByType(%q) = %q; want %q", tt.typ, got, tt.want)
}
}
}
func TestLookupMallocs(t *testing.T) {
t.Skip("skipping test on gccgo until it has better escape analysis")
n := testing.AllocsPerRun(10000, func() {
TypeByExtension(".html")
TypeByExtension(".HtML")
})
if n > 0 {
t.Errorf("allocs = %v; want 0", n)
}
}
func BenchmarkTypeByExtension(b *testing.B) {
initMime()
b.ResetTimer()
for _, ext := range []string{
".html",
".HTML",
".unused",
} {
b.Run(ext, func(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
TypeByExtension(ext)
}
})
})
}
}
func BenchmarkExtensionsByType(b *testing.B) {
initMime()
b.ResetTimer()
for _, typ := range []string{
"text/html",
"text/html; charset=utf-8",
"application/octet-stream",
} {
b.Run(typ, func(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
if _, err := ExtensionsByType(typ); err != nil {
b.Fatal(err)
}
}
})
})
}
}
func TestExtensionsByType2(t *testing.T) {
cleanup := setMimeInit(func() {
clearMimeTypes()
// Initialize built-in types like in type.go before osInitMime.
setMimeTypes(builtinTypesLower, builtinTypesLower)
})
defer cleanup()
tests := []struct {
typ string
want []string
}{
{typ: "image/jpeg", want: []string{".jpeg", ".jpg"}},
}
for _, tt := range tests {
got, err := ExtensionsByType(tt.typ)
if err != nil {
t.Errorf("ExtensionsByType(%q): %v", tt.typ, err)
continue
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("ExtensionsByType(%q) = %q; want %q", tt.typ, got, tt.want)
}
}
}
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