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tile38/vendor/github.com/tidwall/geojson/feature_test.go

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Faster point in polygon / GeoJSON updates The big change is that the GeoJSON package has been completely rewritten to fix a few of geometry calculation bugs, increase performance, and to better follow the GeoJSON spec RFC 7946. GeoJSON updates - A LineString now requires at least two points. - All json members, even foreign, now persist with the object. - The bbox member persists too but is no longer used for geometry calculations. This is change in behavior. Previously Tile38 would treat the bbox as the object's physical rectangle. - Corrections to geometry intersects and within calculations. Faster spatial queries - The performance of Point-in-polygon and object intersect operations are greatly improved for complex polygons and line strings. It went from O(n) to roughly O(log n). - The same for all collection types with many children, including FeatureCollection, GeometryCollection, MultiPoint, MultiLineString, and MultiPolygon. Codebase changes - The pkg directory has been renamed to internal - The GeoJSON internal package has been moved to a seperate repo at https://github.com/tidwall/geojson. It's now vendored. Please look out for higher memory usage for datasets using complex shapes. A complex shape is one that has 64 or more points. For these shapes it's expected that there will be increase of least 54 bytes per point.
2018-10-11 00:25:40 +03:00
package geojson
import "testing"
func TestFeatureParse(t *testing.T) {
p := expectJSON(t, `{"type":"Feature","geometry":{"type":"Point","coordinates":[1,2,3]}}`, nil)
expect(t, p.Center() == P(1, 2))
expectJSON(t, `{"type":"Feature"}`, errGeometryMissing)
expectJSON(t, `{"type":"Feature","geometry":null}`, errDataInvalid)
expectJSON(t, `{"type":"Feature","geometry":{"type":"Point","coordinates":[1,2,3]},"bbox":null}`, nil)
expectJSON(t, `{"type":"Feature","geometry":{"type":"Point","coordinates":[1,2]},"id":[4,true]}`, nil)
expectJSON(t, `{"type":"Feature","geometry":{"type":"Point","coordinates":[1,2]},"id":"15","properties":{"a":"b"}}`, nil)
expectJSON(t, `{"type":"Feature","geometry":{"type":"Point","coordinates":[1,2,3]},"bbox":[1,2,3,4]}`, nil)
expectJSON(t, `{"type":"Feature","geometry":{"type":"Point","coordinates":[1,2],"bbox":[1,2,3,4]},"id":[4,true]}`, nil)
}
func TestFeatureVarious(t *testing.T) {
var g = expectJSON(t, `{"type":"Feature","geometry":{"type":"Point","coordinates":[1,2,3]}}`, nil)
expect(t, string(g.AppendJSON(nil)) == `{"type":"Feature","geometry":{"type":"Point","coordinates":[1,2,3]}}`)
expect(t, g.Rect() == R(1, 2, 1, 2))
expect(t, g.Center() == P(1, 2))
expect(t, !g.Empty())
g = expectJSONOpts(t,
`{"type":"Feature","geometry":{"type":"Point","coordinates":[1,2,3]},"bbox":[1,2,3,4]}`,
nil, nil)
expect(t, !g.Empty())
expect(t, g.Rect() == R(1, 2, 1, 2))
expect(t, g.Center() == P(1, 2))
}
// func TestFeaturePoly(t *testing.T) {
// p := expectJSON(t, `{"type":"Feature","geometry":{"type":"Point","coordinates":[1,2]}}`, nil)
// expect(t, p.Intersects(PO(1, 2)))
// expect(t, p.Contains(PO(1, 2)))
// expect(t, p.Within(PO(1, 2)))
// }