fix: normalize nullable repository descriptions (#54)

tests/test_context_timeout.py

@@ -62,4 +62,32 @@ async def test_context_normalizes_nullable_issue_collections(monkeypatch):
     issue = json.loads(response.body)["issues"][0]
 
     assert issue["labels"] == []
-    assert issue["assignees"] == []
+    assert issue["assignees"] == []
+
+
+@pytest.mark.anyio
+async def test_context_normalizes_nullable_repository_description(monkeypatch):
+    async def user():
+        return {"id": 1, "login": "timmy"}
+
+    async def empty_collection():
+        return []
+
+    async def repo_collection():
+        return [{
+            "id": 54,
+            "name": "dashboard",
+            "full_name": "stackchain/dashboard",
+            "description": None,
+            "html_url": "https://forge.example/stackchain/dashboard",
+        }]
+
+    monkeypatch.setattr(main, "current_user", user)
+    monkeypatch.setattr(main, "repos", repo_collection)
+    monkeypatch.setattr(main, "issues", empty_collection)
+    monkeypatch.setattr(main, "pull_requests", empty_collection)
+
+    response = await main.context()
+    repository = json.loads(response.body)["repos"][0]
+
+    assert repository["description"] == ""