fn test_hex() {

    assert_eq!(from_str("0x507"), Ok(0x507));

    assert_eq!(from_str("0x1A5"), Ok(0x1A5));

    assert_eq!(from_str("0x53C537"), Ok(0x53C537));

    assert_eq!(

        from_str::<u8>("0x"),

        Err(SpannedError {

            code: Error::ExpectedInteger,

            position: Position { line: 1, col: 3 },

        })

    );

    assert_eq!(

        from_str::<u8>("0x_1"),

        Err(SpannedError {

            code: Error::UnderscoreAtBeginning,

            position: Position { line: 1, col: 3 },

        })

    );

    assert_eq!(

        from_str::<u8>("0xFFF"),

        Err(SpannedError {

            code: Error::IntegerOutOfBounds,

            position: Position { line: 1, col: 6 },

        })

    );

}

fn test_bin() {

    assert_eq!(from_str("0b101"), Ok(0b101));

    assert_eq!(from_str("0b001"), Ok(0b001));

    assert_eq!(from_str("0b100100"), Ok(0b100100));

    assert_eq!(

        from_str::<u8>("0b"),

        Err(SpannedError {

            code: Error::ExpectedInteger,

            position: Position { line: 1, col: 3 },

        })

    );

    assert_eq!(

        from_str::<u8>("0b_1"),

        Err(SpannedError {

            code: Error::UnderscoreAtBeginning,

            position: Position { line: 1, col: 3 },

        })

    );

    assert_eq!(

        from_str::<u8>("0b111111111"),

        Err(SpannedError {

            code: Error::IntegerOutOfBounds,

            position: Position { line: 1, col: 12 },

        })

    );

}

fn test_oct() {

    assert_eq!(from_str("0o1461"), Ok(0o1461));

    assert_eq!(from_str("0o051"), Ok(0o051));

    assert_eq!(from_str("0o150700"), Ok(0o150700));

    assert_eq!(

        from_str::<u8>("0o"),

        Err(SpannedError {

            code: Error::ExpectedInteger,

            position: Position { line: 1, col: 3 },

        })

    );

    assert_eq!(

        from_str::<u8>("0o_1"),

        Err(SpannedError {

            code: Error::UnderscoreAtBeginning,

            position: Position { line: 1, col: 3 },

        })

    );

    assert_eq!(

        from_str::<u8>("0o77777"),

        Err(SpannedError {

            code: Error::IntegerOutOfBounds,

            position: Position { line: 1, col: 8 },

        })

    );

}

fn test_dec() {

    assert_eq!(from_str("1461"), Ok(1461));

    assert_eq!(from_str("51"), Ok(51));

    assert_eq!(from_str("150700"), Ok(150700));

    assert_eq!(

        from_str::<i8>("-_1"),

        Err(SpannedError {

            code: Error::UnderscoreAtBeginning,

            position: Position { line: 1, col: 2 },

        })

    );

    assert_eq!(

        from_str::<u8>("256"),

        Err(SpannedError {

            code: Error::IntegerOutOfBounds,

            position: Position { line: 1, col: 4 },

        })

    );

}