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testing.py
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testing.py
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"""
Testing functionality for geopandas objects.
"""
from geopandas import GeoSeries, GeoDataFrame
def geom_equals(this, that):
"""
Test for geometric equality. Empty 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)).all()
def geom_almost_equals(this, that):
"""
Test for 'almost' geometric equality. Empty 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)).all()
def assert_geoseries_equal(left, right,
check_dtype=False,
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_index_type:
assert isinstance(left.index, type(right.index))
if check_dtype:
assert left.dtype == right.dtype, "dtype: %s != %s" % (left.dtype,
right.dtype)
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 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:
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 = left.drop([right._geometry_column_name], axis=1)
assert_frame_equal(left2, right2, check_dtype=check_dtype,
check_index_type=check_index_type, obj='GeoDataFrame')