def METHOD_NAME(self):
    """
    Initialize Materials class with the default values.
    """
    device = torch.device("cuda:0")
    mat = Materials(device=device)
    self.assertTrue(torch.is_tensor(mat.ambient_color))
    self.assertTrue(torch.is_tensor(mat.diffuse_color))
    self.assertTrue(torch.is_tensor(mat.specular_color))
    self.assertTrue(torch.is_tensor(mat.shininess))
    self.assertTrue(mat.ambient_color.device == device)
    self.assertTrue(mat.diffuse_color.device == device)
    self.assertTrue(mat.specular_color.device == device)
    self.assertTrue(mat.shininess.device == device)
    self.assertTrue(mat.ambient_color.shape == (1, 3))
    self.assertTrue(mat.diffuse_color.shape == (1, 3))
    self.assertTrue(mat.specular_color.shape == (1, 3))
    self.assertTrue(mat.shininess.shape == (1,))