add example

mime_example_test.go

@@ -0,0 +1,36 @@
+package mime_test
+
+import (
+	"fmt"
+
+	"gitoa.ru/go-4devs/mime"
+)
+
+func ExampleMime_String() {
+	fmt.Printf("%v", mime.TextHTML)
+
+	// Output:
+	// text/html
+}
+
+func ExampleMime_Is() {
+	fmt.Printf("%v\n%v",
+		mime.TextHTML.Is(mime.ApplicationJSON, mime.ApplicationJavascript),
+		mime.TextHTML.Is(mime.ApplicationJavascript, mime.TextHTML),
+	)
+
+	// Output:
+	// false
+	// true
+}
+
+func ExampleMime_ExtTypes() {
+	fmt.Printf("%v\n%v",
+		mime.TextHTML.ExtTypes(),
+		mime.ApplicationJavascript.ExtTypes(),
+	)
+
+	// Output:
+	// [html htm shtml]
+	// [js mjs jsm]
+}