def test_no_conversion():
"""Two valid units that do not have a valid conversion"""
quanity = 3
froam = "tbsp"
to = "mph"
with pytest.raises(ValueError):
conversions.convert(quanity, froam, to)
def test_unknown_unit():
"""No conversions exist for one or more given inputs"""
quanity = 3
froam = "tbsp"
to = "couch"
with pytest.raises(ValueError):
conversions.convert(quanity, froam, to)
def test_valid_conversion():
"""Returns multiple of the quanity"""
quanity = 6
froam = "tsp"
to = "tbsp"
expected = 2
actual = conversions.convert(quanity, froam, to)
assert actual == expected
def test_valid_reversed():
"""Look up order for units does not matter"""
quanity = 3
froam = "tbsp"
to = "tsp"
expected = 9
actual = conversions.convert(quanity, froam, to)
assert actual == expected