code: def test_points_from_xy(self):
      df = pd.DataFrame([{"x": x, "y": x, "z": x} for x in range(10)])
      arr = points_from_xy(df["x"], df["y"], crs=27700)
      assert arr.crs == self.osgb
  
imports: import random
  import warnings
  import numpy
  import pandas
  import pyproj
  import pytest
  from shapely.geometry import Point, Polygon, LineString
  from geopandas import GeoSeries, GeoDataFrame, points_from_xy, read_file
  from geopandas.array import from_shapely, from_wkb, from_wkt, GeometryArray
  from geopandas.testing import assert_geodataframe_equal
label_desc: Use image node_id 21 for calling the TestGeometryArrayCRS obj's underlying member method code with example usage: obj.test_points_from_xy() without return types