code: def test_gcp():
      gcp = GroundControlPoint(1.0, 1.5, 100.0, 1000.0, z=0.0)
      assert gcp.row == 1.0
      assert gcp.col == 1.5
      assert gcp.x == 100.0
      assert gcp.y == 1000.0
      assert gcp.z == 0.0
      assert isinstance(gcp.id, str)
  
file_path: rasterio/tests/test_gcps.py
imports: import numpy
  import pytest
  import rasterio
  from rasterio.control import GroundControlPoint
label_desc: Use image node_id 2 for calling a global function with example usage: test_gcp() without return types