docstr: Tests that GeoDataFrame can be written to PostGIS with defaults.
docstr_tok: ["Tests","that","GeoDataFrame","can","be","written","to","PostGIS","with","defaults","."]
code: def test_write_postgis_default(self, engine_postgis, df_nybb):
      """Tests that GeoDataFrame can be written to PostGIS with defaults."""
      engine = engine_postgis
      table = "nybb"
  
      # If table exists, delete it before trying to write with defaults
      drop_table_if_exists(engine, table)
  
      # Write to db
      write_postgis(df_nybb, con=engine, name=table, if_exists="fail")
      # Validate
      sql = text("SELECT * FROM {table};".format(table=table))
      df = read_postgis(sql, engine, geom_col="geometry")
      validate_boro_df(df)
  
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 13 for calling the TestIO obj's underlying member method code with example usage: obj.test_write_postgis_default(engine_postgis, df_nybb) without return types