def test_RootOf_evalf_caching_bug():
r = RootOf(x**5 - 5*x + 12, 1)
r.n()
a = r._get_interval()
r = RootOf(x**5 - 5*x + 12, 1)
r.n()
b = r._get_interval()
assert a == b
def test_CRootOf_evalf_caching_bug():
r = rootof(x**5 - 5 * x + 12, 1)
r.n()
a = r._get_interval()
r = rootof(x**5 - 5 * x + 12, 1)
r.n()
b = r._get_interval()
assert a == b
def test_RootOf_is_imaginary():
r = RootOf(x**4 + 4 * x**2 + 1, 1)
i = r._get_interval()
assert r.is_imaginary and i.ax * i.bx <= 0
def test_RootOf_is_imaginary():
r = RootOf(x**4 + 4*x**2 + 1, 1)
i = r._get_interval()
assert r.is_imaginary and i.ax*i.bx <= 0
