Add test for both format parsers

Author: Jacalz

src/mime/type_unix_test.go

@@ -0,0 +1,34 @@
+// Copyright 2021 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 (
+	"testing"
+)
+
+func initMimeUnixTest() {
+	err := loadMimeGlobsFile("testdata/test.types.globs2")
+	if err != nil {
+		panic(err)
+	}
+
+	loadMimeFile("testdata/test.types")
+}
+
+func TestTypeByExtensionUNIX(t *testing.T) {
+	initMimeUnixTest()
+	typeTests := map[string]string{
+		".T1":  "application/test",
+		".t2":  "text/test; charset=utf-8",
+		".png": "image/png",
+	}
+
+	for ext, want := range typeTests {
+		val := TypeByExtension(ext)
+		if val != want {
+			t.Errorf("TypeByExtension(%q) = %q, want %q", ext, val, want)
+		}
+	}
+}