def test_Variable(): variable1 = Variable(2, 'x', 3) assert variable1.__str__() == "2{x}^{3}" variable1.integrate('x') assert variable1.__str__() == "0.5{x}^{4}" # FIXME: Optimize integrate """
def test_Variable(): variable1 = Variable(2, 'x', 3) assert variable1.__str__() == "2{x}^{3}" variable1, _ = variable1.integrate('x') assert variable1.__str__() == "0.5{x}^{4}" constant = Constant(3) variable = Variable(2, 'x', 3) add = variable + constant assert add.__str__() == "{(2{x}^{3}+{3})}" variable1 = Variable(2, 'x', 3) variable2 = Variable(4, 'x', 3) add1 = variable1 + variable2 assert add1.__str__() == "6{x}^{3}" variable1 = Variable(2, 'x', 3) constant = Constant(3) exp1 = Expression([variable1, Plus(), constant]) variable2 = Variable(4, 'x', 3) add2 = variable2 + exp1 assert add2.__str__() == "{(6{x}^{3}+{3})}" variable1 = Variable(2, 'x', 3) constant = Constant(3) exp1 = variable1 + constant variable2 = Variable(4, 'x', 3) add2 = variable2 - exp1 assert add2.__str__() == "{(2{x}^{3}-{3})}" variable1 = Variable(2, 'x', 3) constant = Constant(3) exp1 = Expression([variable1, Plus(), constant]) variable2 = Variable(4, 'x', 3) add2 = exp1 - variable2 assert add2.__str__() == "{(-2{x}^{3}+{3})}" constant = Constant(3) variable = Variable(2, 'x', 3) add = variable - constant assert add.__str__() == "{(2{x}^{3}-{3})}" variable1 = Variable(2, 'x', 3) variable2 = Variable(4, 'x', 3) variable3 = Variable(2, 'x', 4) variable4 = Variable(2, 'x', 3) add1 = variable1 - variable2 add2 = variable3 - variable4 assert add1.__str__() == "-2{x}^{3}" assert add2.__str__() == "{(2{x}^{4}-2{x}^{3})}" constant = Constant(3) variable = Variable(2, 'x', 3) add = variable * constant assert add.__str__() == "6{x}^{3}" variable1 = Variable(2, 'x', 3) variable2 = Variable(4, 'x', 3) add2 = variable1 * variable2 assert add2.__str__() == "8{x}^{6}" variable1 = Variable(2, 'x', 3) variable2 = Variable(4, 'y', 3) add2 = variable1 * variable2 assert add2.__str__() == "8{x}^{3}{y}^{3}" variable1 = Variable(2, 'x', 3) variable2 = Variable(4, 'y', 4) add1 = variable1 / variable2 assert add1.__str__() == "0.5{x}^{3}{y}^{-4}" variable1 = Variable(2, 'x', 3) constant = Constant(3) exp1 = variable1 - constant variable2 = Variable(4, 'x', 3) add2 = variable2 / exp1 assert add2.__str__() == "{(4.0{x}^{3}*{(2{x}^{3}-{3})}^{-1})}" variable1 = Variable(2, 'x', 3) constant = Constant(3) exp1 = variable1 - constant variable2 = Variable(4, 'x', 3) add2 = variable2 * exp1 assert add2.__str__() == "{(8{x}^{6}-12{x}^{3})}" variable1 = Variable(2, 'x', 3) constant1 = Constant(3) exp1 = variable1 - constant1 variable2 = Variable(4, 'x', 3) constant2 = Constant(4) exp2 = variable2 - constant2 add2 = exp1 * exp2 assert add2.__str__() == "{({(8{x}^{6}-8{x}^{3})}-{(12{x}^{3}-{12})})}" variable2 = Variable(3, 'x', -1) variable2, _ = variable2.integrate('x') assert tokensToString(variable2) == '3 * log(x)'