def test__given_two_equal_numbers__returns_true():
assert are_equal(0.1 + 0.2, 0.3) is True
def test__given_two_very_large_numbers__returns_true():
"""Assume we hardcore a tolerance , it might be too small."""
assert are_equal(1e23 + 2e23, 3e23, tolerance=1e15) is True
def test_given_negative_tolerance_raise_ValueError():
with pytest.raises(ValueError):
are_equal(0.1 + 0.2, 0.3, tolerance=-1e2)
def test__given_two_very_large_unequal_number_returns_false():
assert are_equal(1e9 + 2e9, 4e9) is False
def test__given_two__unequal_small_numbers__returns_false():
assert are_equal(1e-9 + 2e-9, 4e-9, tolerance=1e-17) is False
def test__given_two_unequal_integer_returns_False():
assert are_equal(1 + 2, 2) is False
def test__given_two_equal_integer__returns_True():
assert are_equal(1 + 2, 3) is True
def test__given_two_unequal_numbers__returns_False():
assert are_equal(0.1 + 0.2, 0.2) is False
