def test_calculate():
"""
test for final calculation method
"""
equation_parser = EquationParser("10/3+10/3")
equation_parser.build()
res = equation_parser.calculate()
assert compare(res, ['success', 7])
equation_parser = EquationParser("4*9/3+10/3-1")
equation_parser.build()
res = equation_parser.calculate()
assert compare(res, ['success', 14])
equation_parser = EquationParser("10/0*6+10/4")
equation_parser.build()
res = equation_parser.calculate()
assert compare(res, ['error', CalcError.DivisionError])
equation_parser = EquationParser("10/6*0+10/4")
equation_parser.build()
res = equation_parser.calculate()
assert compare(res, ['error', CalcError.DivisionError])
def calculate(equation):
"""
Calculates The Final Result
:param equation:
:return:
"""
if len(equation) == 0:
return CalcError.FormatError.value
if not is_symbol_permitted_equation(equation):
return CalcError.SymbolError.value
if has_edge_operator(equation):
return CalcError.FormatError.value
if not is_correct_sequence(equation):
return CalcError.FormatError.value
equation_parser = EquationParser(equation)
equation_parser.build()
res = equation_parser.calculate()
if res[0] == "error":
return res[1].value
return str(res[1])