collection_test.go

package geojson_test

import (
	"encoding/json"
	"testing"

	geojson "github.com/everystreet/go-geojson/v3"
	"github.com/stretchr/testify/require"
)

func TestGeometryCollection(t *testing.T) {
	feature := geojson.NewFeature(
		geojson.NewGeometryCollection(
			geojson.NewPoint(9, 45),
			geojson.NewMultiLineString(
				[]geojson.Position{
					geojson.MakePosition(12, 34),
					geojson.MakePosition(56, 78),
					geojson.MakePosition(90, 12),
				},
				[]geojson.Position{
					geojson.MakePosition(23, 45),
					geojson.MakePosition(67, 89),
				},
			),
			geojson.NewGeometryCollection(
				geojson.NewPoint(37, 12),
			),
		),
	)

	err := feature.Validate()
	require.NoError(t, err)

	data, err := json.Marshal(feature)
	require.NoError(t, err)
	require.JSONEq(t, `
		{
			"type": "Feature",
			"geometry": {
				"type": "GeometryCollection",
				"geometries": [
					{
						"type": "Point",
						"coordinates": [45, 9]
					},
					{
						"type": "MultiLineString",
						"coordinates": [
							[
								[34, 12],
								[78, 56],
								[12, 90]
							],
							[
								[45, 23],
								[89, 67]
							]
						]
					},
					{
						"type": "GeometryCollection",
						"geometries": [
							{
								"type": "Point",
								"coordinates": [12, 37]
							}
						]
					}
				]
			}
		}`, string(data))

	var unmarshalled geojson.Feature[*geojson.GeometryCollection]
	err = json.Unmarshal(data, &unmarshalled)
	require.NoError(t, err)
	require.Equal(t, feature, unmarshalled)
}