test for writing with lower

Author: ErickChacon

src/io.jl

@@ -81,8 +81,6 @@ _lower(t::GI.AbstractMultiPointTrait, d, obj) =
     (type="MultiPoint", coordinates=_to_vector_ntuple(t, d, obj))
 _lower(t::GI.AbstractMultiLineStringTrait, d, obj) =
     (type="MultiLineString", coordinates=_to_vector_ntuple(t, d, obj))
-_lower(t::GI.AbstractPolygonTrait, d, obj) =
-    (type="Polygon", coordinates=_to_vector_ntuple(t, d, obj))
 _lower(t::GI.AbstractMultiPolygonTrait, d, obj) =
     (type="MultiPolygon", coordinates=_to_vector_ntuple(t, d, obj))
 _lower(t::GI.AbstractGeometryCollectionTrait, d, obj) =

test/geojson_samples.jl

@@ -437,7 +437,6 @@ null_prop_feat = """{"geometry": null, "id": 12, "properties": null, "type": "Fe
 
 features = [a, b, c, d, e, f, h]
 
-
 ## Geometry
 
 # Examples from https://datatracker.ietf.org/doc/html/rfc7946#section-1.3

test/runtests.jl

@@ -2,6 +2,7 @@ using GeoJSON
 import GeoInterface as GI
 import GeoFormatTypes
 import Aqua
+import JSON3
 using Extents
 using JSON3
 using Tables
@@ -152,6 +153,15 @@ include("geojson_samples.jl")
             @test GI.extent(f) == GI.extent(f1)
         end
 
+        # Writing using _lower
+        foreach(Samples.features) do json
+            f = GeoJSON.read(json)
+            f1 = GeoJSON.read(JSON3.write(GeoJSON._lower(f)))
+            @test GeoJSON.geometry(f) == GeoJSON.geometry(f1)
+            @test GeoJSON.properties(f) == GeoJSON.properties(f1)
+            @test GI.extent(f) == GI.extent(f1)
+        end
+
         foreach(Samples.featurecollections) do json
             fc = GeoJSON.read(json)
             f1c = GeoJSON.read(GeoJSON.write(fc))