public void Map_ReturnExpectedValue() { Assert.AreEqual("text/plain", _service.Map("file.txt")); Assert.AreEqual("video/x-msvideo", _service.Map("file.avi")); Assert.AreEqual("application/vnd.microsoft.portable-executable", _service.Map("file.exe")); Assert.AreEqual("image/jpeg", _service.Map("file.jpg")); Assert.AreEqual("image/gif", _service.Map("file.gif")); Assert.AreEqual("image/png", _service.Map("file.png")); Assert.AreEqual("application/octet-stream", _service.Map("file.wirdtype")); }