test: add unit test for board deletion and organization access cleanup

backend/tests/test_boards_delete.py

@@ -0,0 +1,52 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Any
+from uuid import uuid4
+
+import pytest
+
+from app.api import boards
+from app.models.boards import Board
+
+
+@dataclass
+class _FakeSession:
+    exec_results: list[Any]
+    executed: list[Any] = field(default_factory=list)
+    deleted: list[Any] = field(default_factory=list)
+    committed: int = 0
+
+    async def exec(self, _statement: Any) -> Any:
+        if not self.exec_results:
+            raise AssertionError("No more exec_results left for session.exec")
+        return self.exec_results.pop(0)
+
+    async def execute(self, statement: Any) -> None:
+        self.executed.append(statement)
+
+    async def delete(self, value: Any) -> None:
+        self.deleted.append(value)
+
+    async def commit(self) -> None:
+        self.committed += 1
+
+
+@pytest.mark.asyncio
+async def test_delete_board_cleans_org_board_access_rows() -> None:
+    session = _FakeSession(exec_results=[[], []])
+    board = Board(
+        id=uuid4(),
+        organization_id=uuid4(),
+        name="Demo Board",
+        slug="demo-board",
+        gateway_id=None,
+    )
+
+    await boards.delete_board(session=session, board=board)
+
+    deleted_table_names = [statement.table.name for statement in session.executed]
+    assert "organization_board_access" in deleted_table_names
+    assert "organization_invite_board_access" in deleted_table_names
+    assert board in session.deleted
+    assert session.committed == 1