public void CheckValidHexNumberByteShould() { string expectedHexNumber = "1D"; bool result = _sendMessagePartialMock.CheckValidHexNumberByte(expectedHexNumber); Assert.AreEqual(true, result); expectedHexNumber = "MS"; result = _sendMessagePartialMock.CheckValidHexNumberByte(expectedHexNumber); Assert.AreEqual(false, result); }