def test_root_6(self):
ans = brentq(5., 10., self.f, self.TOL)
diff = 6. - ans
self.assertTrue(diff < self.TOL)
def test_cosx(self):
ans = brentq(0., 1., self.f2, self.TOL)
diff = 0.824132 - ans
self.assertTrue(diff < self.TOL)
def test_root_2(self):
ans = brentq(-3., -1., self.f, self.TOL)
diff = -2. - ans
self.assertTrue(diff < self.TOL)
