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"""
Tests for geojson generation
"""
import random
import unittest
import geojson
from geojson.utils import generate_random, map_geometries
def generate_bbox():
min_lat = random.random() * 180.0 - 90.0
max_lat = random.random() * 180.0 - 90.0
if min_lat > max_lat:
min_lat, max_lat = max_lat, min_lat
min_lon = random.random() * 360.0 - 180.0
max_lon = random.random() * 360.0 - 180.0
if min_lon > max_lon:
min_lon, max_lon = max_lon, min_lon
return [min_lon, min_lat, max_lon, max_lat]
def check_polygon_bbox(polygon, bbox):
min_lon, min_lat, max_lon, max_lat = bbox
eps = 1e-3
for linear_ring in polygon['coordinates']:
for coordinate in linear_ring:
if not (min_lon-eps <= coordinate[0] <= max_lon+eps
and min_lat-eps <= coordinate[1] <= max_lat+eps):
return False
return True
def check_point_bbox(point, bbox):
min_lon, min_lat, max_lon, max_lat = bbox
eps = 1e-3
if (
min_lon - eps <= point["coordinates"][0] <= max_lon + eps
and min_lat - eps <= point["coordinates"][1] <= max_lat + eps
):
return True
return False
class TestGenerateRandom(unittest.TestCase):
def test_simple_polygon(self):
for _ in range(5000):
bbox = [-180.0, -90.0, 180.0, 90.0]
result = generate_random('Polygon')
self.assertIsInstance(result, geojson.geometry.Polygon)
self.assertTrue(geojson.geometry.check_polygon(result))
self.assertTrue(check_polygon_bbox(result, bbox))
def test_bbox_polygon(self):
for _ in range(5000):
bbox = generate_bbox()
result = generate_random('Polygon', boundingBox=bbox)
self.assertIsInstance(result, geojson.geometry.Polygon)
self.assertTrue(geojson.geometry.check_polygon(result))
self.assertTrue(check_polygon_bbox(result, bbox))
def test_bbox_point(self):
for _ in range(5000):
bbox = generate_bbox()
result = generate_random("Point", boundingBox=bbox)
self.assertIsInstance(result, geojson.geometry.Point)
self.assertTrue(geojson.geometry.check_point(result))
self.assertTrue(check_point_bbox(result, bbox))
def test_raise_value_error(self):
with self.assertRaises(ValueError):
generate_random("MultiPolygon")
class TestMapGeometries(unittest.TestCase):
def test_with_simple_type(self):
new_point = map_geometries(
lambda g: geojson.MultiPoint([g["coordinates"]]),
geojson.Point((-115.81, 37.24)),
)
self.assertEqual(new_point, geojson.MultiPoint([(-115.81, 37.24)]))
def test_with_feature_collection(self):
new_point = map_geometries(
lambda g: geojson.MultiPoint([g["coordinates"]]),
geojson.FeatureCollection([geojson.Point((-115.81, 37.24))]),
)
self.assertEqual(
new_point,
geojson.FeatureCollection(
[geojson.MultiPoint([geojson.Point((-115.81, 37.24))])]
),
)
def test_raise_value_error(self):
invalid_object = geojson.Feature(type="InvalidType")
with self.assertRaises(ValueError):
map_geometries(lambda g: g, invalid_object)
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