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import mapnik
def test_add_feature():
md = mapnik.MemoryDatasource()
assert md.num_features() == 0
context = mapnik.Context()
context.push('foo')
feature = mapnik.Feature(context, 1)
feature['foo'] = 'bar'
feature.geometry = mapnik.Geometry.from_wkt('POINT(2 3)')
md.add_feature(feature)
assert md.num_features() == 1
featureset = md.features_at_point(mapnik.Coord(2, 3))
retrieved = []
for feat in featureset:
retrieved.append(feat)
assert len(retrieved) == 1
f = retrieved[0]
assert f['foo'] == 'bar'
featureset = md.features_at_point(mapnik.Coord(20, 30))
retrieved = []
for feat in featureset:
retrieved.append(feat)
assert len(retrieved) == 0
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