def test_glass_repr__returns_expected_value():
"""
Test the object representation of a glass.
This test is used to verify that the object representation
of a glass contains the expected information (i.e. uid and position).
"""
glass = moet.create_glass("A")
assert "moet.glass.Glass(uid=A, pos=None)" in repr(glass)
def test_set_glass_capacity__with_invalid_numbers__returns_expected():
"""
Test setting the value for the amount of liquid a glass can hold.
In this case, we're using invalid numbers (i.e. negative numbers)
"""
glass = moet.create_glass("A")
with pytest.raises(ValueError):
glass.capacity = -100
def test_glass_str__returns_uid():
"""
Test the string representation of a glass.
This test is used to verify that the string representation
of a glass is the glass's unique identifier.
"""
glass = moet.create_glass("A")
assert str(glass) == glass.uid
def test_create_glass__returns_expected_value():
"""
Test creating a glass.
This test demonstrates how to create a glass. It is also used
to verify the initial values of the glass properties.
"""
glass = moet.create_glass("A")
assert glass.uid == "A"
assert glass.position is None
def test_set_glass_millilitres__with_negative_number__raises_value_error():
"""
Test setting the amount of liquid in the glass directly.
This test demonstrates the behaviour when trying to set the
amount of liquid in a glass using a negative number.
"""
glass = moet.create_glass("A")
with pytest.raises(ValueError):
glass.quantity = -100
def test_set_glass_capacity__with_valid_numbers__returns_expected():
"""
Test setting the value for the amount of liquid a glass can hold.
In this case, we're using valid numbers (i.e. 0 or greater)
"""
glass = moet.create_glass("A")
numbers = [0, 1, 250, 0.0, 100.5]
for number in numbers:
glass.capacity = number
assert glass.capacity == number
def test_fill_glass__with_no_overflow__returns_expected(number):
"""
Test filling a glass with liquid.
Args:
number (int or float): The number of millilitres to fill the glass with.
"""
glass = moet.create_glass("A")
overflow = glass.fill(number)
assert not overflow
assert glass.quantity == number
def test_fill_glass__with_overflow__returns_expected(number):
"""
Test filling a glass with liquid.
This test demonstrates the behaviour when trying to fill a glass
with more liquid than it is capable of holding.
Args:
number (int or float): The number of millilitres to fill the glass with.
"""
glass = moet.create_glass("A")
overflow = glass.fill(number)
assert overflow == number - 250
assert glass.quantity == 250
def test_add_glasses_to_tower(number):
"""
Test adding glasses to a tower.
This test demonstrates how to add glasses to a tower of
glasses. It then verifies that the glasses were added by
checking the properties of the tower.
Args:
number (int): The number of glasses to add to the tower.
"""
tower = moet.Tower()
glasses = []
for index in range(number):
id_ = moet.utils.get_id(index)
glass = moet.create_glass(id_)
tower.add_glass(glass)
glasses.append(glass)
assert tower.glasses == glasses
def test_add_glasses_to_tower__returns_expected_positions(number):
"""
Test getting the position of a glass in the tower.
This test demonstrates how to get the position of a glass in a
tower of glasses.
Args:
number (int): The number of glasses to add to the tower
"""
tower = moet.Tower()
# Add glasses
for index in range(number):
id_ = moet.utils.get_id(index)
glass = moet.create_glass(id_)
tower.add_glass(glass)
# Check positions.
rows = list(tower.get_rows())
for row_index, row in enumerate(rows):
for column_index, glass in enumerate(row):
print(glass, glass.position)
assert glass.position == (row_index, column_index)
def test_glass_capacity__has_expected_default_value():
"""
Test the default value for the amount of liquid a glass can hold.
"""
glass = moet.create_glass("A")
assert glass.capacity == 250
