def test_disambiguate():
x, y, y_1, _x, x_1, x_2 = symbols('x y y_1 _x x_1 x_2')
t1 = Dummy('y'), _x, Dummy('x'), Dummy('x')
t2 = Dummy('x'), Dummy('x')
t3 = Dummy('x'), Dummy('y')
t4 = x, Dummy('x')
t5 = Symbol('x', integer=True), x, Symbol('x_1')
assert disambiguate(*t1) == (y, x_2, x, x_1)
assert disambiguate(*t2) == (x, x_1)
assert disambiguate(*t3) == (x, y)
assert disambiguate(*t4) == (x_1, x)
assert disambiguate(*t5) == (t5[0], x_2, x_1)
assert disambiguate(*t5)[0] != x # assumptions are retained
t6 = _x, Dummy('x') / y
t7 = y * Dummy('y'), y
assert disambiguate(*t6) == (x_1, x / y)
assert disambiguate(*t7) == (y * y_1, y_1)
assert disambiguate(Dummy('x_1'), Dummy('x_1')) == (x_1, Symbol('x_1_1'))
def test_disambiguate():
x, y, y_1, _x, x_1, x_2 = symbols('x y y_1 _x x_1 x_2')
t1 = Dummy('y'), _x, Dummy('x'), Dummy('x')
t2 = Dummy('x'), Dummy('x')
t3 = Dummy('x'), Dummy('y')
t4 = x, Dummy('x')
t5 = Symbol('x', integer=True), x, Symbol('x_1')
assert disambiguate(*t1) == (y, x_2, x, x_1)
assert disambiguate(*t2) == (x, x_1)
assert disambiguate(*t3) == (x, y)
assert disambiguate(*t4) == (x_1, x)
assert disambiguate(*t5) == (t5[0], x_2, x_1)
assert disambiguate(*t5)[0] != x # assumptions are retained
t6 = _x, Dummy('x')/y
t7 = y*Dummy('y'), y
assert disambiguate(*t6) == (x_1, x/y)
assert disambiguate(*t7) == (y*y_1, y_1)
assert disambiguate(Dummy('x_1'), Dummy('x_1')
) == (x_1, Symbol('x_1_1'))