def test_when_decimal_created_from_float_then_is_set_to_precision(self):
expected_result = Decimal('0.13')
with change_decimal_precision(2):
result = getcontext().create_decimal_from_float(0.128123)
self.assertEqual(result, expected_result)
def test_change_precision_when_result_is_less_than_1_then_change_precision_in_with_block(
self):
expected_result = Decimal('0.36')
with change_decimal_precision(2):
result = Decimal('0.123') + Decimal('0.236')
self.assertEqual(result, expected_result)
def test_change_precision_when_result_is_greater_than_1_then_change_precision_in_with_block(
self):
expected_result = Decimal('3.3592')
with change_decimal_precision(5):
result = Decimal('1.123123') + Decimal('2.236123')
self.assertEqual(result, expected_result)
def test_when_change_precision_then_restore_previous_precision_after_with_block(
self):
expected_result = Decimal('3.359246')
with change_decimal_precision(2):
pass
result = Decimal('1.123123') + Decimal('2.236123')
self.assertEqual(result, expected_result)
def test_when_operator_gets_decimal_from_float_and_decimal_dont_raise_TypeError(
self):
with change_decimal_precision(2):
Decimal('0.123123') + getcontext().create_decimal_from_float(
0.123123)
def test_when_operator_gets_float_and_decimal_raise_TypeError(self):
with self.assertRaises(TypeError):
with change_decimal_precision(2):
Decimal('0.123123') + 0.123123
def test_when_divide_by_zero_raise_DivisionByZero_exception(self):
with self.assertRaises(DivisionByZero):
with change_decimal_precision(2):
Decimal('0.123123') / Decimal('0')