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 testGivenExpressionWithTwoVariablesSameNameWhenSimplifyThenExpressionWithOneVariableWithCorrectValueIsObtained(
self):
variable1 = VariableBuilder().name('x').build()
expression = ExpressionBuilder().term(variable1).term(variable1).term(
VariableBuilder().name('y').build()).default_constant().build()
expression.simplify_variable(variable1.name)
self.assertTrue(expression.get_value_variable(variable1.name),
2 * variable1.value)
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 testGivenEmpyExpressionWhenSimplifyNameThenEmptyExpressionIsObtained(
self):
expression = ExpressionBuilder().build()
expression.simplify_variable('any_name')
self.assertTrue(expression.empty())
