Add stub test

tests/test_filters_jinja2.py

@@ -0,0 +1,33 @@
+"""Tests for Jinja2 CQL2 filter."""
+
+import pytest
+from fastapi.testclient import TestClient
+from utils import AppFactory
+
+app_factory = AppFactory(
+    oidc_discovery_url="https://example-stac-api.com/.well-known/openid-configuration",
+    default_public=False,
+)
+
+
+def test_collections_filter_contained_by_token(source_api_server, token_builder):
+    """"""
+    app = app_factory(
+        upstream_url=source_api_server,
+        collections_filter={
+            "cls": "stac_auth_proxy.filters.Template",
+            "args": [
+                "A_CONTAINEDBY(id, ( '{{ token.collections | join(\"', '\") }}' ))"
+            ],
+        },
+    )
+    client = TestClient(
+        app,
+        headers={
+            "Authorization": f"Bearer {token_builder({"collections": ["foo", "bar"]})}"
+        },
+    )
+    response = client.get("/collections")
+    assert response.status_code == 200
+
+    # TODO: We need to verify that the upstream API was called with an applied filter