add super basic tests

test/geometry_lookup.jl

@@ -0,0 +1,31 @@
+using NaturalEarth
+using Test
+
+using Rasters, DimensionalData
+import Proj
+
+@testset "construction" begin
+    # fetch land polygons from Natural Earth
+    land_polygons = NaturalEarth.naturalearth("admin_0_countries", 110).geometry
+    # create a DimVector from the land polygons
+    gl = GeometryLookup(land_polygons)
+    @test crs(gl) == EPSG(4326)
+    @test all(GO.equals, zip(val(gl), land_polygons))
+end
+
+@testset "reprojecting a GeometryLookup" begin
+    # fetch land polygons from Natural Earth
+    land_polygons = NaturalEarth.naturalearth("admin_0_countries", 110).geometry
+    # create a DimVector from the land polygons
+    dv = Raster(rand(Dim{:Geometry}(GeometryLookup(land_polygons))))
+    # reproject the full vector data cube (vector data vector, in this case :D)
+    target_crs = ProjString("+proj=wintri +type=crs")
+    reprojected_via_rasters = val(dims(reproject(target_crs, dv), Dim{:Geometry}))
+    reprojected_via_geometryops = GO.reproject(land_polygons; source_crs = EPSG(4326), target_crs = target_crs) 
+    # test that the reprojected geometries are the same
+    @test all(splat(GO.equals), zip(
+        reprojected_via_rasters,  # reproject the vdc, get the geometries from it
+        reprojected_via_geometryops # reproject the geometries directly
+        )
+    )
+end

test/runtests.jl

@@ -22,6 +22,7 @@ end
 @time @safetestset "reproject" begin include("reproject.jl") end
 @time @safetestset "warp" begin include("warp.jl") end
 @time @safetestset "cellarea" begin include("cellarea.jl") end
+@time @safetestset "geometrylookups" begin include("geometry_lookups.jl") end
 
 # CommondataModel sources
 @time @safetestset "commondatamodel" begin include("sources/commondatamodel.jl") end