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"""
This module tests the functionality of shapefile.py.
"""
import
contextlib
import
datetime
import
io
import
json
import
os
.
path
from
pathlib
import
Path
import
shutil
# third party imports
import
pytest
# our imports (the code under test)
import
shapefile
# helper functions
from
.
run_doctests
import
(
REPLACE_REMOTE_URLS_WITH_LOCALHOST
,
_replace_remote_url_with_localhost
,
)
shapefiles_dir
=
Path
(
__file__
).
parent
/
"shapefiles"
# define various test shape tuples of (type, points, parts indexes, and expected geo interface output)
geo_interface_tests
=
[
(
shapefile
.
POINT
,
# point
[(
1
,
1
)],
[],
{
"type"
:
"Point"
,
"coordinates"
: (
1
,
1
)},
),
(
shapefile
.
MULTIPOINT
,
# multipoint
[(
1
,
1
), (
2
,
1
), (
2
,
2
)],
[],
{
"type"
:
"MultiPoint"
,
"coordinates"
: [(
1
,
1
), (
2
,
1
), (
2
,
2
)]},
),
(
shapefile
.
POLYLINE
,
# single linestring
[(
1
,
1
), (
2
,
1
)],
[
0
],
{
"type"
:
"LineString"
,
"coordinates"
: [(
1
,
1
), (
2
,
1
)]},
),
(
shapefile
.
POLYLINE
,
# multi linestring
[
(
1
,
1
),
(
2
,
1
),
# line 1
(
10
,
10
),
(
20
,
10
),
],
# line 2
[
0
,
2
],
{
"type"
:
"MultiLineString"
,
"coordinates"
: [
[(
1
,
1
), (
2
,
1
)],
# line 1
[(
10
,
10
), (
20
,
10
)],
# line 2
],
},
),
(
shapefile
.
POLYGON
,
# single polygon, no holes
[
(
1
,
1
),
(
1
,
9
),
(
9
,
9
),
(
9
,
1
),
(
1
,
1
),
# exterior
],
[
0
],
{
"type"
:
"Polygon"
,
"coordinates"
: [
[(
1
,
1
), (
1
,
9
), (
9
,
9
), (
9
,
1
), (
1
,
1
)],
],
},
),
(
shapefile
.
POLYGON
,
# single polygon, holes (ordered)
[
(
1
,
1
),
(
1
,
9
),
(
9
,
9
),
(
9
,
1
),
(
1
,
1
),
# exterior
(
2
,
2
),
(
4
,
2
),
(
4
,
4
),
(
2
,
4
),
(
2
,
2
),
# hole 1
(
5
,
5
),
(
7
,
5
),
(
7
,
7
),
(
5
,
7
),
(
5
,
5
),
# hole 2
],
[
0
,
5
,
5
+
5
],
{
"type"
:
"Polygon"
,
"coordinates"
: [
[(
1
,
1
), (
1
,
9
), (
9
,
9
), (
9
,
1
), (
1
,
1
)],
# exterior
[(
2
,
2
), (
4
,
2
), (
4
,
4
), (
2
,
4
), (
2
,
2
)],
# hole 1
[(
5
,
5
), (
7
,
5
), (
7
,
7
), (
5
,
7
), (
5
,
5
)],
# hole 2
],
},
),
(
shapefile
.
POLYGON
,
# single polygon, holes (unordered)
[
(
2
,
2
),
(
4
,
2
),
(
4
,
4
),
(
2
,
4
),
(
2
,
2
),
# hole 1
(
1
,
1
),
(
1
,
9
),
(
9
,
9
),
(
9
,
1
),
(
1
,
1
),
# exterior
(
5
,
5
),
(
7
,
5
),
(
7
,
7
),
(
5
,
7
),
(
5
,
5
),
# hole 2
],
[
0
,
5
,
5
+
5
],
{
"type"
:
"Polygon"
,
"coordinates"
: [
[(
1
,
1
), (
1
,
9
), (
9
,
9
), (
9
,
1
), (
1
,
1
)],
# exterior
[(
2
,
2
), (
4
,
2
), (
4
,
4
), (
2
,
4
), (
2
,
2
)],
# hole 1
[(
5
,
5
), (
7
,
5
), (
7
,
7
), (
5
,
7
), (
5
,
5
)],
# hole 2
],
},
),
(
shapefile
.
POLYGON
,
# multi polygon, no holes
[
(
1
,
1
),
(
1
,
9
),
(
9
,
9
),
(
9
,
1
),
(
1
,
1
),
# exterior
(
11
,
11
),
(
11
,
19
),
(
19
,
19
),
(
19
,
11
),
(
11
,
11
),
# exterior
],
[
0
,
5
],
{
"type"
:
"MultiPolygon"
,
"coordinates"
: [
[
# poly 1
[(
1
,
1
), (
1
,
9
), (
9
,
9
), (
9
,
1
), (
1
,
1
)],
],
[
# poly 2
[(
11
,
11
), (
11
,
19
), (
19
,
19
), (
19
,
11
), (
11
,
11
)],
],
],
},
),
(
shapefile
.
POLYGON
,
# multi polygon, holes (unordered)
[
(
1
,
1
),
(
1
,
9
),
(
9
,
9
),
(
9
,
1
),
(
1
,
1
),
# exterior 1
(
11
,
11
),
(
11
,
19
),
(
19
,
19
),
(
19
,
11
),
(
11
,
11
),
# exterior 2
(
12
,
12
),
(
14
,
12
),
(
14
,
14
),
(
12
,
14
),
(
12
,
12
),
# hole 2.1
(
15
,
15
),
(
17
,
15
),
(
17
,
17
),
(
15
,
17
),
(
15
,
15
),
# hole 2.2
(
2
,
2
),
(
4
,
2
),
(
4
,
4
),
(
2
,
4
),
(
2
,
2
),
# hole 1.1
(
5
,
5
),
(
7
,
5
),
(
7
,
7
),
(
5
,
7
),
(
5
,
5
),
# hole 1.2
],
[
0
,
5
,
10
,
15
,
20
,
25
],
{
"type"
:
"MultiPolygon"
,
"coordinates"
: [
[
# poly 1
[(
1
,
1
), (
1
,
9
), (
9
,
9
), (
9
,
1
), (
1
,
1
)],
# exterior
[(
2
,
2
), (
4
,
2
), (
4
,
4
), (
2
,
4
), (
2
,
2
)],
# hole 1
[(
5
,
5
), (
7
,
5
), (
7
,
7
), (
5
,
7
), (
5
,
5
)],
# hole 2
],
[
# poly 2
[(
11
,
11
), (
11
,
19
), (
19
,
19
), (
19
,
11
), (
11
,
11
)],
# exterior
[(
12
,
12
), (
14
,
12
), (
14
,
14
), (
12
,
14
), (
12
,
12
)],
# hole 1
[(
15
,
15
), (
17
,
15
), (
17
,
17
), (
15
,
17
), (
15
,
15
)],
# hole 2
],
],
},
),
(
shapefile
.
POLYGON
,
# multi polygon, nested exteriors with holes (unordered)
[
(
1
,
1
),
(
1
,
9
),
(
9
,
9
),
(
9
,
1
),
(
1
,
1
),
# exterior 1
(
3
,
3
),
(
3
,
7
),
(
7
,
7
),
(
7
,
3
),
(
3
,
3
),
# exterior 2
(
4.5
,
4.5
),
(
4.5
,
5.5
),
(
5.5
,
5.5
),
(
5.5
,
4.5
),
(
4.5
,
4.5
),
# exterior 3
(
4
,
4
),
(
6
,
4
),
(
6
,
6
),
(
4
,
6
),
(
4
,
4
),
# hole 2.1
(
2
,
2
),
(
8
,
2
),
(
8
,
8
),
(
2
,
8
),
(
2
,
2
),
# hole 1.1
],
[
0
,
5
,
10
,
15
,
20
],
{
"type"
:
"MultiPolygon"
,
"coordinates"
: [
[
# poly 1
[(
1
,
1
), (
1
,
9
), (
9
,
9
), (
9
,
1
), (
1
,
1
)],
# exterior 1
[(
2
,
2
), (
8
,
2
), (
8
,
8
), (
2
,
8
), (
2
,
2
)],
# hole 1.1
],
[
# poly 2
[(
3
,
3
), (
3
,
7
), (
7
,
7
), (
7
,
3
), (
3
,
3
)],
# exterior 2
[(
4
,
4
), (
6
,
4
), (
6
,
6
), (
4
,
6
), (
4
,
4
)],
# hole 2.1
],
[
# poly 3
[
(
4.5
,
4.5
),
(
4.5
,
5.5
),
(
5.5
,
5.5
),
(
5.5
,
4.5
),
(
4.5
,
4.5
),
],
# exterior 3
],
],
},
),
(
shapefile
.
POLYGON
,
# multi polygon, nested exteriors with holes (unordered and tricky holes designed to throw off ring_sample() test)
[
(
1
,
1
),
(
1
,
9
),
(
9
,
9
),
(
9
,
1
),
(
1
,
1
),
# exterior 1
(
3
,
3
),
(
3
,
7
),
(
7
,
7
),
(
7
,
3
),
(
3
,
3
),
# exterior 2
(
4.5
,
4.5
),
(
4.5
,
5.5
),
(
5.5
,
5.5
),
(
5.5
,
4.5
),
(
4.5
,
4.5
),
# exterior 3
(
4
,
4
),
(
4
,
4
),
(
6
,
4
),
(
6
,
4
),
(
6
,
4
),
(
6
,
6
),
(
4
,
6
),
(
4
,
4
),
# hole 2.1 (hole has duplicate coords)
(
2
,
2
),
(
3
,
3
),
(
4
,
2
),
(
8
,
2
),
(
8
,
8
),
(
4
,
8
),
(
2
,
8
),
(
2
,
4
),
(
2
,
2
,
),
# hole 1.1 (hole coords form straight line and starts in concave orientation)
],
[
0
,
5
,
10
,
15
,
20
+
3
],
{
"type"
:
"MultiPolygon"
,
"coordinates"
: [
[
# poly 1
[(
1
,
1
), (
1
,
9
), (
9
,
9
), (
9
,
1
), (
1
,
1
)],
# exterior 1
[
(
2
,
2
),
(
3
,
3
),
(
4
,
2
),
(
8
,
2
),
(
8
,
8
),
(
4
,
8
),
(
2
,
8
),
(
2
,
4
),
(
2
,
2
),
],
# hole 1.1
],
[
# poly 2
[(
3
,
3
), (
3
,
7
), (
7
,
7
), (
7
,
3
), (
3
,
3
)],
# exterior 2
[
(
4
,
4
),
(
4
,
4
),
(
6
,
4
),
(
6
,
4
),
(
6
,
4
),
(
6
,
6
),
(
4
,
6
),
(
4
,
4
),
],
# hole 2.1
],
[
# poly 3
[
(
4.5
,
4.5
),
(
4.5
,
5.5
),
(
5.5
,
5.5
),
(
5.5
,
4.5
),
(
4.5
,
4.5
),
],
# exterior 3
],
],
},
),
(
shapefile
.
POLYGON
,
# multi polygon, holes incl orphaned holes (unordered), should raise warning
[
(
1
,
1
),
(
1
,
9
),
(
9
,
9
),
(
9
,
1
),
(
1
,
1
),
# exterior 1
(
11
,
11
),
(
11
,
19
),
(
19
,
19
),
(
19
,
11
),
(
11
,
11
),
# exterior 2
(
12
,
12
),
(
14
,
12
),
(
14
,
14
),
(
12
,
14
),
(
12
,
12
),
# hole 2.1
(
15
,
15
),
(
17
,
15
),
(
17
,
17
),
(
15
,
17
),
(
15
,
15
),
# hole 2.2
(
95
,
95
),
(
97
,
95
),
(
97
,
97
),
(
95
,
97
),
(
95
,
95
),
# hole x.1 (orphaned hole, should be interpreted as exterior)
(
2
,
2
),
(
4
,
2
),
(
4
,
4
),
(
2
,
4
),
(
2
,
2
),
# hole 1.1
(
5
,
5
),
(
7
,
5
),
(
7
,
7
),
(
5
,
7
),
(
5
,
5
),
# hole 1.2
],
[
0
,
5
,
10
,
15
,
20
,
25
,
30
],
{
"type"
:
"MultiPolygon"
,
"coordinates"
: [
[
# poly 1
[(
1
,
1
), (
1
,
9
), (
9
,
9
), (
9
,
1
), (
1
,
1
)],
# exterior
[(
2
,
2
), (
4
,
2
), (
4
,
4
), (
2
,
4
), (
2
,
2
)],
# hole 1
[(
5
,
5
), (
7
,
5
), (
7
,
7
), (
5
,
7
), (
5
,
5
)],
# hole 2
],
[
# poly 2
[(
11
,
11
), (
11
,
19
), (
19
,
19
), (
19
,
11
), (
11
,
11
)],
# exterior
[(
12
,
12
), (
14
,
12
), (
14
,
14
), (
12
,
14
), (
12
,
12
)],
# hole 1
[(
15
,
15
), (
17
,
15
), (
17
,
17
), (
15
,
17
), (
15
,
15
)],
# hole 2
],
[
# poly 3 (orphaned hole)
[(
95
,
95
), (
97
,
95
), (
97
,
97
), (
95
,
97
), (
95
,
95
)],
# exterior
],
],
},
),
(
shapefile
.
POLYGON
,
# multi polygon, exteriors with wrong orientation (be nice and interpret as such), should raise warning
[
(
1
,
1
),
(
9
,
1
),
(
9
,
9
),
(
1
,
9
),
(
1
,
1
),
# exterior with hole-orientation
(
11
,
11
),
(
19
,
11
),
(
19
,
19
),
(
11
,
19
),
(
11
,
11
),
# exterior with hole-orientation
],
[
0
,
5
],
{
"type"
:
"MultiPolygon"
,
"coordinates"
: [
[
# poly 1
[(
1
,
1
), (
9
,
1
), (
9
,
9
), (
1
,
9
), (
1
,
1
)],
],
[
# poly 2
[(
11
,
11
), (
19
,
11
), (
19
,
19
), (
11
,
19
), (
11
,
11
)],
],
],
},
),
]
def
test_empty_shape_geo_interface
():
"""
Assert that calling __geo_interface__
on a Shape with no points or parts
raises an Exception.
"""
shape
=
shapefile
.
Shape
()
with
pytest
.
raises
(
Exception
):
getattr
(
shape
,
"__geo_interface__"
)
@
pytest
.
mark
.
parametrize
(
"typ,points,parts,expected"
,
geo_interface_tests
)
def
test_expected_shape_geo_interface
(
typ
,
points
,
parts
,
expected
):
"""
Assert that calling __geo_interface__
on arbitrary input Shape works as expected.
"""
shape
=
shapefile
.
Shape
(
typ
,
points
,
parts
)
geoj
=
shape
.
__geo_interface__
assert
geoj
==
expected
def
test_reader_geo_interface
():
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
as
r
:
geoj
=
r
.
__geo_interface__
assert
geoj
[
"type"
]
==
"FeatureCollection"
assert
"bbox"
in
geoj
assert
json
.
dumps
(
geoj
)
def
test_shapes_geo_interface
():
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
as
r
:
geoj
=
r
.
shapes
().
__geo_interface__
assert
geoj
[
"type"
]
==
"GeometryCollection"
assert
json
.
dumps
(
geoj
)
def
test_shaperecords_geo_interface
():
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
as
r
:
geoj
=
r
.
shapeRecords
().
__geo_interface__
assert
geoj
[
"type"
]
==
"FeatureCollection"
assert
json
.
dumps
(
geoj
)
def
test_shaperecord_geo_interface
():
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
as
r
:
for
shaperec
in
r
:
assert
json
.
dumps
(
shaperec
.
__geo_interface__
)
@
pytest
.
mark
.
skipif
(
not
REPLACE_REMOTE_URLS_WITH_LOCALHOST
,
reason
=
"Flakey test, fails due to Github rate limit"
,
)
@
pytest
.
mark
.
network
def
test_reader_nvkelso_files_from_localhost_url
():
"""
Assert that Reader can open shapefiles from a url.
"""
# Only test these shapefiles from localhost,
# https://github.com/nvkelso/natural-earth-vector urls throws 426 errors ("too many downloads").
# A suitable repo of test files, and a localhost server setup is
# defined in ./.github/actions/test/actions.yml
def
Reader
(
url
):
new_url
=
_replace_remote_url_with_localhost
(
url
)
print
(
f"repr(new_url):
{
repr
(
new_url
)
}
"
)
return
shapefile
.
Reader
(
new_url
)
# test with extension
url
=
"https://github.com/nvkelso/natural-earth-vector/blob/master/110m_cultural/ne_110m_admin_0_tiny_countries.shp?raw=true"
with
Reader
(
url
)
as
sf
:
for
__recShape
in
sf
.
iterShapeRecords
():
pass
assert
sf
.
shp
.
closed
assert
sf
.
_shx
is
None
or
sf
.
shx
.
closed
assert
sf
.
dbf
.
closed
# test without extension
url
=
"https://github.com/nvkelso/natural-earth-vector/blob/master/110m_cultural/ne_110m_admin_0_tiny_countries?raw=true"
with
Reader
(
url
)
as
sf
:
for
__recShape
in
sf
.
iterShapeRecords
():
pass
assert
len
(
sf
)
>
0
assert
sf
.
shp
.
closed
assert
sf
.
_shx
is
None
or
sf
.
shx
.
closed
assert
sf
.
dbf
.
closed
@
pytest
.
mark
.
network
def
test_reader_urls
():
"""
Assert that Reader can open shapefiles from a few different urls.
"""
# Allow testing loading of shapefiles from a url on localhost (to avoid
# overloading external servers, and associated spurious test failures).
# A suitable repo of test files, and a localhost server setup is
# defined in ./.github/actions/test/actions.yml
if
REPLACE_REMOTE_URLS_WITH_LOCALHOST
:
def
Reader
(
url
):
new_url
=
_replace_remote_url_with_localhost
(
url
)
print
(
f"repr(new_url):
{
repr
(
new_url
)
}
"
)
return
shapefile
.
Reader
(
new_url
)
else
:
print
(
"Using plain Reader"
)
Reader
=
shapefile
.
Reader
# test no files found
url
=
"https://raw.githubusercontent.com/nvkelso/natural-earth-vector/master/README.md"
with
pytest
.
raises
(
shapefile
.
ShapefileException
):
with
Reader
(
url
)
as
sf
:
pass
# test reading zipfile from url
urls
=
[
"https://github.com/JamesParrott/PyShp_test_shapefile/raw/main/gis_osm_natural_a_free_1.zip"
,
"http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/cultural/ne_10m_admin_0_boundary_lines_land.zip"
,
]
for
url
in
urls
:
try
:
with
Reader
(
url
)
as
sf
:
for
__recShape
in
sf
.
iterShapeRecords
():
pass
assert
len
(
sf
)
>
0
except
shapefile
.
HTTPError
:
pass
else
:
assert
sf
.
shp
.
closed
is
sf
.
shx
.
closed
is
sf
.
dbf
.
closed
is
True
break
else
:
raise
shapefile
.
HTTPError
(
"
\n
"
.
join
(
urls
),
"Could not download .zipped shapefiles from any of the test urls"
,
404
,
{},
None
,
)
def
test_reader_zip
():
"""
Assert that Reader can open shapefiles inside a zipfile.
"""
# test reading zipfile only
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.zip"
)
as
sf
:
for
__recShape
in
sf
.
iterShapeRecords
():
pass
assert
len
(
sf
)
>
0
assert
sf
.
shp
.
closed
is
sf
.
shx
.
closed
is
sf
.
dbf
.
closed
is
True
# test require specific path when reading multi-shapefile zipfile
with
pytest
.
raises
(
shapefile
.
ShapefileException
):
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups_multishapefile.zip"
)
as
sf
:
pass
# test specifying the path when reading multi-shapefile zipfile (with extension)
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups_multishapefile.zip/blockgroups2.shp"
)
as
sf
:
for
__recShape
in
sf
.
iterShapeRecords
():
pass
assert
len
(
sf
)
>
0
assert
sf
.
shp
.
closed
is
sf
.
shx
.
closed
is
sf
.
dbf
.
closed
is
True
# test specifying the path when reading multi-shapefile zipfile (without extension)
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups_multishapefile.zip/blockgroups2"
)
as
sf
:
for
__recShape
in
sf
.
iterShapeRecords
():
pass
assert
len
(
sf
)
>
0
assert
sf
.
shp
.
closed
is
sf
.
shx
.
closed
is
sf
.
dbf
.
closed
is
True
# test raising error when can't find shapefile inside zipfile
with
pytest
.
raises
(
shapefile
.
ShapefileException
):
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/empty_zipfile.zip"
)
as
sf
:
pass
def
test_reader_close_path
():
"""
Assert that manually calling Reader.close()
closes the shp, shx, and dbf files
on exit, if given paths.
"""
# note uses an actual shapefile from
# the projects "shapefiles" directory
sf
=
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shp"
)
sf
.
close
()
assert
sf
.
shp
.
closed
is
True
assert
sf
.
dbf
.
closed
is
True
assert
sf
.
shx
.
closed
is
True
# check that can read again
sf
=
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shp"
)
sf
.
close
()
def
test_reader_close_filelike
():
"""
Assert that manually calling Reader.close()
leaves the shp, shx, and dbf files open
on exit, if given filelike objects.
"""
# note uses an actual shapefile from
# the projects "shapefiles" directory
shp
=
open
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shp"
,
mode
=
"rb"
)
shx
=
open
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shx"
,
mode
=
"rb"
)
dbf
=
open
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.dbf"
,
mode
=
"rb"
)
sf
=
shapefile
.
Reader
(
shp
=
shp
,
shx
=
shx
,
dbf
=
dbf
)
sf
.
close
()
assert
sf
.
shp
.
closed
is
False
assert
sf
.
dbf
.
closed
is
False
assert
sf
.
shx
.
closed
is
False
# check that can read again
sf
=
shapefile
.
Reader
(
shp
=
shp
,
shx
=
shx
,
dbf
=
dbf
)
sf
.
close
()
def
test_reader_context_path
():
"""
Assert that using the context manager
closes the shp, shx, and dbf files
on exit, if given paths.
"""
# note uses an actual shapefile from
# the projects "shapefiles" directory
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
as
sf
:
pass
assert
sf
.
shp
.
closed
is
True
assert
sf
.
dbf
.
closed
is
True
assert
sf
.
shx
.
closed
is
True
# check that can read again
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
as
sf
:
pass
def
test_reader_context_filelike
():
"""
Assert that using the context manager
leaves the shp, shx, and dbf files open
on exit, if given filelike objects.
"""
# note uses an actual shapefile from
# the projects "shapefiles" directory
shp
=
open
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shp"
,
mode
=
"rb"
)
shx
=
open
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shx"
,
mode
=
"rb"
)
dbf
=
open
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.dbf"
,
mode
=
"rb"
)
with
shapefile
.
Reader
(
shp
=
shp
,
shx
=
shx
,
dbf
=
dbf
)
as
sf
:
pass
assert
sf
.
shp
.
closed
is
False
assert
sf
.
dbf
.
closed
is
False
assert
sf
.
shx
.
closed
is
False
# check that can read again
with
shapefile
.
Reader
(
shp
=
shp
,
shx
=
shx
,
dbf
=
dbf
)
as
sf
:
pass
def
test_reader_shapefile_type
():
"""
Assert that the type of the shapefile
is returned correctly.
"""
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
as
sf
:
assert
sf
.
shapeType
==
5
# 5 means Polygon
assert
sf
.
shapeType
==
shapefile
.
POLYGON
assert
sf
.
shapeTypeName
==
"POLYGON"
def
test_reader_shapefile_length
():
"""
Assert that the length the reader gives us
matches up with the number of records
in the file.
"""
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
as
sf
:
assert
len
(
sf
)
==
len
(
sf
.
shapes
())
def
test_shape_metadata
():
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
as
sf
:
shape
=
sf
.
shape
(
0
)
assert
shape
.
shapeType
==
5
# Polygon
assert
shape
.
shapeType
==
shapefile
.
POLYGON
assert
sf
.
shapeTypeName
==
"POLYGON"
def
test_reader_fields
():
"""
Assert that the reader's fields attribute
gives the shapefile's fields as a list.
Assert that each field has a name,
type, field length, and decimal length.
"""
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
as
sf
:
fields
=
sf
.
fields
assert
isinstance
(
fields
,
list
)
field
=
fields
[
0
]
assert
isinstance
(
field
[
0
],
str
)
# field name
assert
field
[
1
]
in
[
"C"
,
"N"
,
"F"
,
"L"
,
"D"
,
"M"
]
# field type
assert
isinstance
(
field
[
2
],
int
)
# field length
assert
isinstance
(
field
[
3
],
int
)
# decimal length
def
test_reader_shapefile_extension_ignored
():
"""
Assert that the filename's extension is
ignored when reading a shapefile.
"""
base
=
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
ext
=
".abc"
filename
=
base
+
ext
with
shapefile
.
Reader
(
filename
)
as
sf
:
assert
len
(
sf
)
==
663
# assert test.abc does not exist
assert
not
os
.
path
.
exists
(
filename
)
def
test_reader_pathlike
():
"""
Assert that path-like objects can be read.
"""
with
shapefile
.
Reader
(
shapefiles_dir
/
"blockgroups"
)
as
sf
:
assert
len
(
sf
)
==
663
def
test_reader_dbf_only
():
"""
Assert that specifying just the
dbf argument to the shapefile reader
reads just the dbf file.
"""
with
shapefile
.
Reader
(
dbf
=
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.dbf"
)
as
sf
:
assert
len
(
sf
)
==
663
record
=
sf
.
record
(
3
)
assert
record
[
1
:
3
]
==
[
"060750601001"
,
4715
]
def
test_reader_dbf_only_from_Path
():
"""
Assert that specifying just the
dbf argument to the shapefile reader as a Path
reads just the dbf file.
"""
with
shapefile
.
Reader
(
dbf
=
shapefiles_dir
/
"blockgroups.dbf"
)
as
sf
:
assert
len
(
sf
)
==
663
record
=
sf
.
record
(
3
)
assert
record
[
1
:
3
]
==
[
"060750601001"
,
4715
]
def
test_reader_shp_shx_only
():
"""
Assert that specifying just the
shp and shx argument to the shapefile reader
reads just the shp and shx file.
"""
with
shapefile
.
Reader
(
shp
=
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shp"
,
shx
=
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shx"
,
)
as
sf
:
assert
len
(
sf
)
==
663
shape
=
sf
.
shape
(
3
)
assert
len
(
shape
.
points
)
==
173
def
test_reader_shp_shx_only_from_Paths
():
"""
Assert that specifying just the
shp and shx arguments to the shapefile reader as Paths
reads just the shp and shx file.
"""
with
shapefile
.
Reader
(
shp
=
shapefiles_dir
/
"blockgroups.shp"
,
shx
=
shapefiles_dir
/
"blockgroups.shx"
)
as
sf
:
assert
len
(
sf
)
==
663
shape
=
sf
.
shape
(
3
)
assert
len
(
shape
.
points
)
==
173
def
test_reader_shp_dbf_only
():
"""
Assert that specifying just the
shp and dbf arguments to the shapefile reader
reads just the shp and dbf file.
"""
with
shapefile
.
Reader
(
shp
=
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shp"
,
dbf
=
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.dbf"
,
)
as
sf
:
assert
len
(
sf
)
==
663
shape
=
sf
.
shape
(
3
)
assert
len
(
shape
.
points
)
==
173
record
=
sf
.
record
(
3
)
assert
record
[
1
:
3
]
==
[
"060750601001"
,
4715
]
def
test_reader_shp_dbf_only_from_Paths
():
"""
Assert that specifying just the
shp and dbf arguments to the shapefile reader as Paths
reads just the shp and dbf file.
"""
with
shapefile
.
Reader
(
shp
=
shapefiles_dir
/
"blockgroups.shp"
,
dbf
=
shapefiles_dir
/
"blockgroups.dbf"
)
as
sf
:
assert
len
(
sf
)
==
663
shape
=
sf
.
shape
(
3
)
assert
len
(
shape
.
points
)
==
173
record
=
sf
.
record
(
3
)
assert
record
[
1
:
3
]
==
[
"060750601001"
,
4715
]
def
test_reader_shp_only
():
"""
Assert that specifying just the
shp argument to the shapefile reader
reads just the shp file (shx optional).
"""
with
shapefile
.
Reader
(
shp
=
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shp"
)
as
sf
:
assert
len
(
sf
)
==
663
shape
=
sf
.
shape
(
3
)
assert
len
(
shape
.
points
)
==
173
def
test_reader_shp_only_from_Path
():
"""
Assert that specifying just the
shp argument to the shapefile reader as a Path
reads just the shp file (shx optional).
"""
with
shapefile
.
Reader
(
shp
=
shapefiles_dir
/
"blockgroups.shp"
)
as
sf
:
assert
len
(
sf
)
==
663
shape
=
sf
.
shape
(
3
)
assert
len
(
shape
.
points
)
==
173
def
test_reader_filelike_dbf_only
():
"""
Assert that specifying just the
dbf argument to the shapefile reader
reads just the dbf file.
"""
with
shapefile
.
Reader
(
dbf
=
open
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.dbf"
,
"rb"
)
)
as
sf
:
assert
len
(
sf
)
==
663
record
=
sf
.
record
(
3
)
assert
record
[
1
:
3
]
==
[
"060750601001"
,
4715
]
def
test_reader_filelike_shp_shx_only
():
"""
Assert that specifying just the
shp and shx argument to the shapefile reader
reads just the shp and shx file.
"""
with
shapefile
.
Reader
(
shp
=
open
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shp"
,
"rb"
),
shx
=
open
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shx"
,
"rb"
),
)
as
sf
:
assert
len
(
sf
)
==
663
shape
=
sf
.
shape
(
3
)
assert
len
(
shape
.
points
)
==
173
def
test_reader_filelike_shp_dbf_only
():
"""
Assert that specifying just the
shp and shx argument to the shapefile reader
reads just the shp and dbf file.
"""
with
shapefile
.
Reader
(
shp
=
open
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shp"
,
"rb"
),
dbf
=
open
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.dbf"
,
"rb"
),
)
as
sf
:
assert
len
(
sf
)
==
663
shape
=
sf
.
shape
(
3
)
assert
len
(
shape
.
points
)
==
173
record
=
sf
.
record
(
3
)
assert
record
[
1
:
3
]
==
[
"060750601001"
,
4715
]
def
test_reader_filelike_shp_only
():
"""
Assert that specifying just the
shp argument to the shapefile reader
reads just the shp file (shx optional).
"""
with
shapefile
.
Reader
(
shp
=
open
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups.shp"
,
"rb"
)
)
as
sf
:
assert
len
(
sf
)
==
663
shape
=
sf
.
shape
(
3
)
assert
len
(
shape
.
points
)
==
173
def
test_reader_shapefile_delayed_load
():
"""
Assert that both:
i) reading a shape from an uninitialised Reader() raises ShapefileException and,
ii) it can still load a shapefile for reading afterwards, via .load(...).
"""
with
shapefile
.
Reader
()
as
sf
:
# assert that data request raises exception, since no file has been provided yet
with
pytest
.
raises
(
shapefile
.
ShapefileException
):
sf
.
shape
(
0
)
# assert that works after loading file manually
sf
.
load
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
assert
len
(
sf
)
==
663
def
test_records_match_shapes
():
"""
Assert that the number of records matches
the number of shapes in the shapefile.
"""
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
as
sf
:
records
=
sf
.
records
()
shapes
=
sf
.
shapes
()
assert
len
(
records
)
==
len
(
shapes
)
def
test_record_attributes
(
fields
=
None
):
"""
Assert that record retrieves all relevant values and can
be accessed as attributes and dictionary items.
"""
# note
# second element in fields matches first element
# in record because records dont have DeletionFlag
with
shapefile
.
Reader
(
f"
{
shapefiles_dir
.
as_posix
()
}
/blockgroups"
)
as
sf
:
for
i
in
range
(
len
(
sf
)):
# full record
full_record
=
sf
.
record
(
i
)
# user-fetched record
if
fields
is
not
None
:
# only a subset of fields
record
=
sf
.
record
(
i
,
fields
=
fields
)
else
:
# default all fields
record
=
full_record
fields
=
[
field
[
0
]
for
field
in
sf
.
fields
[
1
:]
]
# fieldnames, sans del flag
# check correct length
assert
len
(
record
)
==
len
(
set
(
fields
))
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