def METHOD_NAME(self):
    fp = get_bluemira_path("geometry/test_data", subfolder="tests")
    fn = os.sep.join([fp, "bb_offset_test.json"])
    with open(fn, "rb") as file:
        data = json.load(file)
    coordinates = Coordinates(data)
    offsets = []
    for m in ["miter", "square", "round"]:  # round very slow...
        offset_coordinates = offset_clipper(coordinates, 1.5, method=m)
        offsets.append(offset_coordinates)
        # Too damn slow!!
        # distance = self._calculate_offset(coordinates, offset_coordinates)
        # np.testing.assert_almost_equal(distance, 1.5)
    fig, ax = plt.subplots()
    ax.plot(coordinates.x, coordinates.z, color="k")
    colors = ["r", "g", "y"]
    for offset_coordinates, c in zip(offsets, colors):
        ax.plot(offset_coordinates.x, offset_coordinates.z, color=c)
    ax.set_aspect("equal")
    plt.show()
    plt.close(fig)