def set_goal_function(self, function):
"""sets goal function
If function is not correctly set it returns false,
if it is correctly set itt returns true
"""
try:
function = function.lower() # convert input to lower case
expression = self.__parser.parse(
function) # try to parse expression
validator = ExpressionValidator(
expression, self.__variables) # get expression validator
expression, validates, validation_error = validator.validate(
) # expression validation
if not validates:
self.console_logger.log("function is not validating",
LoggerLevel.ERROR)
self.console_logger.log(validation_error, LoggerLevel.ERROR)
print validation_error
raise Exception()
self.__expression = expression
self.__fetch_function_name() # fetch simple name from function
self.console_logger.log(
"function: " + self.get_expression().toString(),
LoggerLevel.ADDITIONAL)
self.__correctly_parsed = True
return True
except Exception:
self.__correctly_parsed = False
return False
def testExpressionValidation(self):
for (gf, answers) in zip(self.goal_functions, self.answers):
expr, validates, val_error = ExpressionValidator(
gf.expression).validate()
self.assertEqual(answers[0], expr.toString())
self.assertEqual(answers[1], gf.get_function_name())
self.assertTrue(validates)
def set_goal_function(self, function):
"""sets goal function
If function is not correctly set it returns false,
if it is correctly set itt returns true
"""
try:
function = function.lower() # convert input to lower case
expression = self.__parser.parse(function) # try to parse expression
validator = ExpressionValidator(expression, self.__variables) # get expression validator
expression, validates, validation_error = validator.validate() # expression validation
if not validates:
self.console_logger.log("function is not validating", LoggerLevel.ERROR)
self.console_logger.log(validation_error, LoggerLevel.ERROR)
print validation_error
raise Exception()
self.__expression = expression
self.__fetch_function_name() # fetch simple name from function
self.console_logger.log("function: " + self.get_expression().toString(), LoggerLevel.ADDITIONAL)
self.__correctly_parsed = True
return True
except Exception:
self.__correctly_parsed = False
return False
def testExpressionValidation(self):
for (gf, answers) in zip(self.goal_functions, self.answers):
expr, validates, val_error = ExpressionValidator(gf.expression).validate()
self.assertEqual(answers[0], expr.toString())
self.assertEqual(answers[1], gf.get_function_name())
self.assertTrue(validates)
def testExpressionFailure(self):
for gf in self.goal_err_functions:
expr, validates, val_error = ExpressionValidator(
gf.__expression).validate()
self.assertFalse(validates)
