public void Should_BeTheSame_When_InstanceIsTheSameForLong()
        {
            // Arrange
            var myFirstEntity = new MyLongEntity(12);

            // Act
            var areEqual = myFirstEntity == myFirstEntity;

            // Assert
            Assert.IsTrue(areEqual);
        }
        public void Should_NotBeTheSame_When_IdAreDifferentForLong()
        {
            // Arrange
            var myFirstEntity  = new MyLongEntity(12);
            var mySecondEntity = new MyLongEntity(13);

            // Act
            var areEqual = myFirstEntity == mySecondEntity;

            // Assert
            Assert.IsFalse(areEqual);
        }