docs: def ndarray_store_with_uncompressed_write(mongo_server):
      """
      The database state created by this fixture is equivalent to the following operations using arctic 1.40
      or previous:
  
          arctic.initialize_library('arctic_test.TEST', m.VERSION_STORE, segment='month')
          library = arctic.get_library('arctic_test.TEST')
          arr = np.arange(2).astype([('abc', 'int64')])
          library.write('MYARR', arr[:1])
          library.write('MYARR', arr)
  
      different from newer versions, the last write creates a uncompressed chunk.
      """
      mongo_server.api.drop_database('arctic_test')
  
      library_name = 'arctic_test.TEST'
      arctic = m.Arctic(mongo_host=mongo_server.api)
      arctic.initialize_library(library_name, m.VERSION_STORE, segment='month')
  
      db = mongo_server.api.arctic_test
      db.TEST.insert_many([
          {
              "_id": bson.ObjectId("5ad0742ca0949de6727cf994"),
              "segment": 0,
              "sha": bson.Binary(base64.b64decode("Fk+quqPVSDfaajYJkOAvnDyXtGQ="), 0),
              "symbol": "MYARR",
              "data": bson.Binary(base64.b64decode("CAAAAIAAAAAAAAAAAA=="), 0),
              "compressed": True,
              "parent": [bson.ObjectId("5ad0742c5c911d4d80ee2ea3")]
          },
          {
              "_id": bson.ObjectId("5ad0742ca0949de6727cf995"),
              "sha": bson.Binary(base64.b64decode("eqpp8VOJBttTz0j5H+QGtOQ+r44="), 0),
              "symbol": "MYARR",
              "segment": 1,
              "data": bson.Binary(base64.b64decode("AQAAAAAAAAA="), 0),
              "compressed": False,
              "parent": [bson.ObjectId("5ad0742c5c911d4d80ee2ea3")]
          }
      ])
      db.TEST.ARCTIC.update_one({"_id": "ARCTIC_META"}, {"$set": {"_id": "ARCTIC_META", "TYPE": "VersionStore", "QUOTA": 10737418240}})
      db.TEST.versions_nums.insert_one({"_id": bson.ObjectId("5ad0742ca0949de6727cf993"), "symbol": "MYARR", "version": 2})
      db.TEST.versions.insert_many([
          {
              "_id": bson.ObjectId("5ad0742c5c911d4d80ee2ea3"),
              "append_count": 0,
              "dtype_metadata": {},
              "segment_count": 1,
              "dtype": "[('abc', '<i8')]",
              "symbol": "MYARR",
              "up_to": 1,
              "append_size": 0,
              "sha": bson.Binary(base64.b64decode("Bf5AV1MWbxJVWefJrFWGVPEHx+k="), 0),
              "shape": [-1],
              "version": 1,
              "base_sha": bson.Binary(base64.b64decode("Bf5AV1MWbxJVWefJrFWGVPEHx+k="), 0),
              "type": "ndarray",
              "metadata": None
          },
          {
              "_id": bson.ObjectId("5ad0742c5c911d4d80ee2ea4"),
              "append_count": 1,
              "dtype_metadata": {},
              "segment_count": 2,
              "base_version_id": bson.ObjectId("5ad0742c5c911d4d80ee2ea3"),
              "dtype": "[('abc', '<i8')]",
              "symbol": "MYARR",
              "up_to": 2,
              "append_size": 8,
              "sha": bson.Binary(base64.b64decode("Ax7oBxVFw1/9wKog2gfOLjbOVD8="), 0),
              "shape": [-1],
              "version": 2,
              "base_sha": bson.Binary(base64.b64decode("Bf5AV1MWbxJVWefJrFWGVPEHx+k="), 0),
              "type": "ndarray",
              "metadata": None
          }
      ])
  
      return {'symbol': 'MYARR', 'store': arctic.get_library('arctic_test.TEST')}