def METHOD_NAME(self, wcs):
    pixline = self.reg.to_pixel(wcs)
    assert_allclose(pixline.start.x, -50.5)
    assert_allclose(pixline.start.y, 299.5)
    assert_allclose(pixline.end.x, -50.5)
    assert_allclose(pixline.end.y, 349.5)
    skyline = pixline.to_sky(wcs)
    assert_quantity_allclose(skyline.start.data.lon,
                             self.reg.start.data.lon)
    assert_quantity_allclose(skyline.start.data.lat,
                             self.reg.start.data.lat)
    assert_quantity_allclose(skyline.end.data.lon, self.reg.end.data.lon)
    assert_quantity_allclose(skyline.end.data.lat, self.reg.end.data.lat)