"""Type casting.

@see: https://www.w3schools.com/python/python_casting.asp

There may be times when you want to specify a type on to a variable. This can be done with casting.
Python is an object-orientated language, and as such it uses classes to define data types,
including its primitive types.

Casting in python is therefore done using constructor functions:

- int() - constructs an integer number from an integer literal, a float literal (by rounding down
to the previous whole number) literal, or a string literal (providing the string represents a
whole number)

- float() - constructs a float number from an integer literal, a float literal or a string literal
(providing the string represents a float or an integer)

- str() - constructs a string from a wide variety of data types, including strings, integer
literals and float literals
"""


def test_type_casting_to_integer():
    """Type casting to integer"""

    assert int(1) == 1
    assert int(2.8) == 2
    assert int('3') == 3


def test_type_casting_to_float():
    """Type casting to float"""

    assert float(1) == 1.0
    assert float(2.8) == 2.8
    assert float("3") == 3.0
    assert float("4.2") == 4.2


def test_type_casting_to_string():
    """Type casting to string"""

    assert str("s1") == 's1'
    assert str(2) == '2'
    assert str(3.0) == '3.0'