code: def test_search_prefix_gdal_data(mock_fhs):
      """Find GDAL data under prefix"""
      finder = GDALDataFinder()
      assert finder.search_prefix(str(mock_fhs)) == str(
          mock_fhs.join("share").join("gdal")
      )
  
imports: import pytest
  from rasterio._env import GDALDataFinder, PROJDataFinder, get_proj_data_search_paths, get_gdal_data
  from .conftest import gdal_version
label_desc: Use image node_id 7 for calling a global function with example usage: test_search_prefix_gdal_data(mock_fhs) without return types