old_contents: import os
  import re
  
  import fiona
  import fiona.crs
  
  from .conftest import WGS84PATTERN
  
  def test_collection_crs_wkt(path_coutwildrnp_shp):
      with fiona.open(path_coutwildrnp_shp) as src:
          assert re.match(WGS84PATTERN, src.crs_wkt)
  
  
  def test_collection_no_crs_wkt(tmpdir, path_coutwildrnp_shp):
      """crs members of a dataset with no crs can be accessed safely."""
      filename = str(tmpdir.join("test.shp"))
      with fiona.open(path_coutwildrnp_shp) as src:
          profile = src.meta
      del profile['crs']
      del profile['crs_wkt']
      with fiona.open(filename, 'w', **profile) as dst:
          assert dst.crs_wkt == ""
          assert dst.crs == {}
  
new_contents: import os
  import re
  
  import fiona
  import fiona.crs
  
  from .conftest import WGS84PATTERN
  
  
  def test_collection_crs_wkt(path_coutwildrnp_shp):
      with fiona.open(path_coutwildrnp_shp) as src:
          assert re.match(WGS84PATTERN, src.crs_wkt)
  
  
  def test_collection_no_crs_wkt(tmpdir, path_coutwildrnp_shp):
      """crs members of a dataset with no crs can be accessed safely."""
      filename = str(tmpdir.join("test.shp"))
      with fiona.open(path_coutwildrnp_shp) as src:
          profile = src.meta
      del profile['crs']
      del profile['crs_wkt']
      with fiona.open(filename, 'w', **profile) as dst:
          assert dst.crs_wkt == ""
          assert dst.crs == {}
  
  
  def test_collection_create_crs_wkt(tmpdir):
      """A collection can be created using crs_wkt"""
      filename = str(tmpdir.join("test.shp"))
      wkt = 'GEOGCS["GCS_WGS_1984",DATUM["WGS_1984",SPHEROID["WGS_84",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295],AUTHORITY["EPSG","4326"]]'
      with fiona.open(filename, 'w', schema={'geometry': 'Point', 'properties': {'foo': 'int'}}, crs_wkt=wkt, driver='GeoJSON') as dst:
          assert dst.crs_wkt == wkt
  
      with fiona.open(filename) as col:
          assert col.crs_wkt.startswith('GEOGCS["WGS 84')
  
subject: Add test for collection creation with crs_wkt