def testGivenExpressionWithTwoConstantsWhenSimplifyThenExpressionWithOneConstantWithCorrectValueIsObtained(
self):
constant1 = ConstantBuilder().build()
expression = ExpressionBuilder().term(constant1).term(
constant1).build()
expression.simplify_constant()
self.assertTrue(expression.get_value_constant(), 2 * constant1.value)
def testGivenExpressionWithTwoVariablesWithSameNameWhenApplyAndSimplifyThenGetValueReturnsCorrectValue(
self):
expression = ExpressionBuilder().term(VariableBuilder().name('x').value(3.0).build()). \
term(VariableBuilder().name('x').value(2.0).build()).build()
expression.apply('x', 1.0)
expression.simplify_constant()
self.assertEqual(expression.get_value_constant(), 5.0)
def testGivenExpressionWithTwoConstantsWithInverseValuesWhenSimplifyThenExpressionWithConstantWithValue0IsObtained(
self):
constant1 = ConstantBuilder().build()
constant2 = constant1.clon()
constant2.multiply(-1.0)
expression = ExpressionBuilder().term(constant1).term(
constant2).build()
expression.simplify_constant()
self.assertEqual(expression.get_value_constant(), 0.0)
def testGivenEmpyExpressionWhenSimplifyThenEmptyExpressionIsObtained(self):
expression = ExpressionBuilder().build()
expression.simplify_constant()
self.assertTrue(expression.empty())
def testGivenExpressionWithOneConstantWhenSimplifyThenSameExpressionIsObtained(
self):
expression = ExpressionBuilder().default_constant().build()
expression2 = expression.clon()
expression.simplify_constant()
self.assertTrue(expression.equal(expression2))