add test for collection extensions

Author: nkleinbaer

stac_fastapi/elasticsearch/tests/resources/test_collection.py

@@ -84,6 +84,20 @@ async def test_returns_valid_collection(ctx, app_client):
     collection.validate()
 
 
+@pytest.mark.asyncio
+async def test_collection_extensions(ctx, app_client):
+    """Test that extensions can be used to define additional top-level properties"""
+    ctx.collection.get("stac_extensions", []).append(
+        "https://stac-extensions.github.io/item-assets/v1.0.0/schema.json"
+    )
+    test_asset = {"title": "test", "description": "test", "type": "test"}
+    ctx.collection["item_assets"] = {"test": test_asset}
+    resp = await app_client.put("/collections", json=ctx.collection)
+
+    assert resp.status_code == 200
+    assert resp.json().get("item_assets", {}).get("test") == test_asset
+
+
 @pytest.mark.asyncio
 async def test_pagination_collection(app_client, ctx, txn_client):
     """Test collection pagination links"""