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testing.py
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testing.py
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"""
Testing functionality for geopandas objects.
"""
import warnings
import pandas as pd
from geopandas import GeoDataFrame, GeoSeries
from geopandas.array import GeometryDtype
def _isna(this):
"""isna version that works for both scalars and (Geo)Series"""
if hasattr(this, "isna"):
return this.isna()
elif hasattr(this, "isnull"):
return this.isnull()
else:
return pd.isnull(this)
def geom_equals(this, that):
"""
Test for geometric equality. Empty or missing geometries are considered
equal.
Parameters
----------
this, that : arrays of Geo objects (or anything that has an `is_empty`
attribute)
"""
return (
this.geom_equals(that)
| (this.is_empty & that.is_empty)
| (_isna(this) & _isna(that))
).all()
def geom_almost_equals(this, that):
"""
Test for 'almost' geometric equality. Empty or missing geometries
considered equal.
This method allows small difference in the coordinates, but this
requires coordinates be in the same order for all components of a geometry.
Parameters
----------
this, that : arrays of Geo objects (or anything that has an `is_empty`
property)
"""
return (
this.geom_almost_equals(that)
| (this.is_empty & that.is_empty)
| (_isna(this) & _isna(that))
).all()
def assert_geoseries_equal(
left,
right,
check_dtype=True,
check_index_type=False,
check_series_type=True,
check_less_precise=False,
check_geom_type=False,
check_crs=True,
):
"""
Test util for checking that two GeoSeries are equal.
Parameters
----------
left, right : two GeoSeries
check_dtype : bool, default False
If True, check geo dtype [only included so it's a drop-in replacement
for assert_series_equal].
check_index_type : bool, default False
Check that index types are equal.
check_series_type : bool, default True
Check that both are same type (*and* are GeoSeries). If False,
will attempt to convert both into GeoSeries.
check_less_precise : bool, default False
If True, use geom_almost_equals. if False, use geom_equals.
check_geom_type : bool, default False
If True, check that all the geom types are equal.
check_crs: bool, default True
If `check_series_type` is True, then also check that the
crs matches.
"""
assert len(left) == len(right), "%d != %d" % (len(left), len(right))
if check_dtype:
msg = "dtype should be a GeometryDtype, got {0}"
assert isinstance(left.dtype, GeometryDtype), msg.format(left.dtype)
assert isinstance(right.dtype, GeometryDtype), msg.format(left.dtype)
if check_index_type:
assert isinstance(left.index, type(right.index))
if check_series_type:
assert isinstance(left, GeoSeries)
assert isinstance(left, type(right))
if check_crs:
assert left.crs == right.crs
else:
if not isinstance(left, GeoSeries):
left = GeoSeries(left)
if not isinstance(right, GeoSeries):
right = GeoSeries(right, index=left.index)
assert left.index.equals(right.index), "index: %s != %s" % (left.index, right.index)
if check_geom_type:
assert (left.type == right.type).all(), "type: %s != %s" % (
left.type,
right.type,
)
if not check_crs:
with warnings.catch_warnings():
warnings.filterwarnings("ignore", "GeoSeries crs mismatch", UserWarning)
if check_less_precise:
assert geom_almost_equals(left, right)
else:
assert geom_equals(left, right)
else:
if check_less_precise:
assert geom_almost_equals(left, right)
else:
assert geom_equals(left, right)
def assert_geodataframe_equal(
left,
right,
check_dtype=True,
check_index_type="equiv",
check_column_type="equiv",
check_frame_type=True,
check_like=False,
check_less_precise=False,
check_geom_type=False,
check_crs=True,
):
"""
Check that two GeoDataFrames are equal/
Parameters
----------
left, right : two GeoDataFrames
check_dtype : bool, default True
Whether to check the DataFrame dtype is identical.
check_index_type, check_column_type : bool, default 'equiv'
Check that index types are equal.
check_frame_type : bool, default True
Check that both are same type (*and* are GeoDataFrames). If False,
will attempt to convert both into GeoDataFrame.
check_like : bool, default False
If true, ignore the order of rows & columns
check_less_precise : bool, default False
If True, use geom_almost_equals. if False, use geom_equals.
check_geom_type : bool, default False
If True, check that all the geom types are equal.
check_crs: bool, default True
If `check_frame_type` is True, then also check that the
crs matches.
"""
try:
# added from pandas 0.20
from pandas.testing import assert_frame_equal, assert_index_equal
except ImportError:
from pandas.util.testing import assert_frame_equal, assert_index_equal
# instance validation
if check_frame_type:
assert isinstance(left, GeoDataFrame)
assert isinstance(left, type(right))
if check_crs:
# no crs can be either None or {}
if not left.crs and not right.crs:
pass
else:
assert left.crs == right.crs
else:
if not isinstance(left, GeoDataFrame):
left = GeoDataFrame(left)
if not isinstance(right, GeoDataFrame):
right = GeoDataFrame(right)
# shape comparison
assert left.shape == right.shape, (
"GeoDataFrame shape mismatch, left: {lshape!r}, right: {rshape!r}.\n"
"Left columns: {lcols!r}, right columns: {rcols!r}".format(
lshape=left.shape,
rshape=right.shape,
lcols=left.columns,
rcols=right.columns,
)
)
if check_like:
left, right = left.reindex_like(right), right
# column comparison
assert_index_equal(
left.columns, right.columns, exact=check_column_type, obj="GeoDataFrame.columns"
)
# geometry comparison
assert_geoseries_equal(
left.geometry,
right.geometry,
check_dtype=check_dtype,
check_less_precise=check_less_precise,
check_geom_type=check_geom_type,
check_crs=False,
)
# drop geometries and check remaining columns
left2 = left.drop([left._geometry_column_name], axis=1)
right2 = right.drop([right._geometry_column_name], axis=1)
assert_frame_equal(
left2,
right2,
check_dtype=check_dtype,
check_index_type=check_index_type,
check_column_type=check_column_type,
obj="GeoDataFrame",
)