def METHOD_NAME(self):
    data = np.array([[1, 1], [1, 1], [2, 1]], dtype="object")
    clusters = np.array([0] * 3)
    hulls = compute_hulls(data, clusters)
    self.assertEqual(1, len(hulls))
    self.assertEqual(2, hulls[0].shape[1])  # hull have x and y