def testGivenExpressionWithOneVariableWhenSimplifyNameThenSameExpressionIsObtained(
self):
variable = VariableBuilder().build()
expression = ExpressionBuilder().term(variable).build()
expression2 = expression.clon()
expression.simplify_variable(variable.name)
self.assertTrue(expression.equal(expression2))
def testGivenExpressionWithVariableWhenAddZeroValueVariableThenNoVariableIsAdded(
self):
expression = ExpressionBuilder().default_variable().build()
expression_original = expression.clon()
zero = VariableBuilder().value(0).build()
expression.add_term(zero)
self.assertEqual(str(expression), str(expression_original))
def testGivenNotEmptyExpressionWhenClonThenExpressionEqualsReturnsTrue(
self):
expression = ExpressionBuilder().default_constant().default_variable(
).default_variable().build()
expression_clon = expression.clon()
self.assertFalse(expression is expression_clon)
self.assertTrue(expression.equal(expression_clon))
def testGivenExpressionWithOneConstantWhenSimplifyThenSameExpressionIsObtained(
self):
expression = ExpressionBuilder().default_constant().build()
expression2 = expression.clon()
expression.simplify_constant()
self.assertTrue(expression.equal(expression2))
def testGivenTwoExpressionsWithConstantsWhenAddExpressionThenExpressionDoesNotSimplify(
self):
expression = ExpressionBuilder().default_constant().build()
expression.add_expression(expression.clon())
self.assertRaises(NotSimplified, expression.get_value_constant)
def testGivenExpressionWithConstantWhenAddZeroThenNoConstantIsAdded(self):
expression = ExpressionBuilder().default_constant().build()
expression_original = expression.clon()
zero = ConstantBuilder().value(0).build()
expression.add_term(zero)
self.assertEqual(str(expression), str(expression_original))