public void GetFormatShouldReturnCorrectFormatProvider( DateTimeFormatProvider provider, Type formatType, object expected )
        {
            // arrange

            // act
            var actual = provider.GetFormat( formatType );

            // assert
            Assert.Same( expected, actual );
        }
        public void GetFormatShouldReturnNullForUnsupportedFormatTypes( DateTimeFormatProvider provider, Type formatType )
        {
            // arrange

            // act
            var actual = provider.GetFormat( formatType );

            // assert
            Assert.Null( actual );
        }