def testGivenExpressionWithTwoVariablesWithInverseValuesWhenSimplifyThenExpressionWithNoVariablesAndConstantWithValue0IsObtained(
self):
variable1 = VariableBuilder().build()
variable2 = variable1.clon()
variable2.multiply(-1.0)
expression = ExpressionBuilder().term(variable1).term(
variable2).build()
expression.simplify_variable(variable1.name)
self.assertEqual(expression.get_value_constant(), 0.0)
self.assertEqual(expression.get_value_variable(variable1.name), 0.0)
def testGivenEmptyEquationWhenAddTermThenTermIsAddedInBothSides(self):
equation = EquationBuilder().build()
term = VariableBuilder().build()
inverse_term = term.clon()
inverse_term.multiply(-1.0)
equation.add(term)
self.assertEqual(equation.get_name_set(), {term.name})
equation.add_side(Side.left, inverse_term)
equation.simplify_variable(Side.left, term.name)
self.assertEqual(equation.get_value_constant(Side.left), 0.0)
self.assertEqual(equation.get_name_set(), {term.name})
equation.add_side(Side.right, inverse_term)
equation.simplify_variable(Side.right, term.name)
self.assertEqual(equation.get_value_constant(Side.right), 0.0)
self.assertEqual(equation.get_name_set(), set())
def testGivenExpressionWithTwoVariablesWithSameNameWhenGetValueNameThenNotSimplifiedIsRaised(
self):
variable = VariableBuilder().name('x').build()
expression = ExpressionBuilder().term(variable).term(
variable.clon()).build()
self.assertRaises(NotSimplified, expression.get_value_variable, 'x')
def testGivenExpressionWithTwoVariablesWithSameNameWhenGetNameSetThenSetWithVariablesNameIsReturned(
self):
variable = VariableBuilder().name('x').build()
expression = ExpressionBuilder().term(variable).term(
variable.clon()).build()
self.assertEqual(expression.get_name_set(), {variable.name})
def testClon(self):
variable1 = VariableBuilder().build()
variable2 = variable1.clon()
self.assertFalse(variable1 is variable2)
self.assertTrue(variable1.equal(variable2))