def testGivenEquationSameVariableTwiceAtRightWithNameXWhenSimplifyNameXThenVariableIsSimplified(
self):
term = VariableBuilder().build()
equation = EquationBuilder().right_term(term).right_term(
term).left_default_constant().build()
equation.simplify_variable(Side.right, term.name)
self.assertEqual(equation.get_value_variable(Side.right, term.name),
2 * term.value)
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())