docstr: Tests that writing a LinearRing.
docstr_tok: ["Tests","that","writing","a","LinearRing","."]
code: def test_write_postgis_linear_ring(
      self, engine_postgis, df_linear_ring
  ):
      """
      Tests that writing a LinearRing.
      """
      engine = engine_postgis
  
      table = "geomtype_tests"
  
      write_postgis(
          df_linear_ring, con=engine, name=table, if_exists="replace"
      )
  
      # Validate geometry type
      sql = text(
          "SELECT DISTINCT(GeometryType(geometry)) FROM {table} ORDER BY 1;".format(
              table=table
          )
      )
      with engine.connect() as conn:
          geom_type = conn.execute(sql).fetchone()[0]
  
      assert geom_type.upper() == "LINESTRING"
  
imports: import os
  import warnings
  import pandas
  import geopandas
  from geopandas import GeoDataFrame, read_file, read_postgis
  import geopandas._compat
  from geopandas.io.sql import _get_conn, _write_postgis
  from geopandas.tests.util import create_postgis, create_spatialite, validate_boro_df
  import pytest
label_desc: Use image node_id 23 for calling the TestIO obj's underlying member method code with example usage: obj.test_write_postgis_linear_ring(engine_postgis, df_linear_ring) without return types