def test_parse_multiplication(self):
"""
parse_multiplication() method is checked in this test in order to
assure it works properly, given a multiplication operation contained
in a string as a input param
"""
expr = '1/(5+7)'
p = Parser(expr)
result = p.parse_multiplication()
self.assertEqual(result, 1.0/12.0)
def test_parse_number_fails_2(self):
"""
In this test parse_number() method is checked. It should return an
exception since there are more than one dot in the given string
"""
expr = '345..5'
p = Parser(expr)
try:
p.parse_number()
except MathParseException:
raised = True
self.assertTrue(raised)
def test_parse_number(self):
"""
This test aims to check if the parse_number() function defined inside
Parse class is able to correctly detect numbers
:return:
"""
expr = ' 5'
p = Parser(expr)
self.assertEqual(p.parse_number(), 5)
expr = '345.5'
p2 = Parser(expr)
self.assertEqual(p2.parse_number(), 345.5)
def test_parse_multiplication_fails(self):
"""
In this test division by zero is checked since it's not possible to
make this operation, parse_multiplication() method should raise a
'MathParseException' so that it can be handled in the rest of the code
"""
expr = '5/0'
p = Parser(expr)
try:
p.parse_multiplication()
except MathParseException:
raised = True
self.assertTrue(raised)
def test_parse_number_fails_1(self):
"""
In this test parse_number() method is checked. It should return an
exception since the string passed as attribute doesn't represent
a number
"""
expr = '('
p = Parser(expr)
try:
p.parse_number()
except MathParseException:
raised = True
self.assertTrue(raised)
def get_value(self):
"""
Unit test responsible of checking the get_value() method
implemented in Parse class
"""
expr = '(2*5) + 5 '
p = Parser(expr)
result = p.get_value()
self.assertEqual(result, 15)
expr2 = '200 * (5+6) /4 + 3'
p2 = Parser(expr2)
result2 = p2.get_value()
self.assertEqual(result2, 553)