def test_desugared_do_notation(self):
# do x_squared <- square_cont x
# y_squared <- square_cont y
# sum_of_squares <- add_cont x_squared y_squared
# return sum_of_squares
add_cps = lambda x, y: return_(x + y)
square_cps = lambda x: return_(x ** 2)
pythagoras_cps = lambda x, y: (square_cps(x) >=
((lambda x_squared: square_cps(y) >=
((lambda y_squared: add_cps(x_squared, y_squared) >=
(lambda sum_of_squares: return_(sum_of_squares)))))))
result = Cont.runCont(pythagoras_cps(3, 4), lambda x: x)
self.assertEquals(25, result)
def test_bind(self):
square_cps = lambda x: return_(x ** 2)
add_three_cps = lambda x: return_(x + 3)
result = Cont.runCont(square_cps(4) >= add_three_cps, lambda x: x)
self.assertEquals(19, result)
def test_single_value(self):
value = 7
cont = return_(value)
result = Cont.runCont(cont, lambda x: x)
self.assertEquals(value, result)
