test(04-02): add failing tests for /gsd:use command handling

- Test _handle_use_project updates user context
- Test success card when project exists
- Test error card with Create button when project doesn't exist
- Test handle_message routes use command
- Test empty project name returns error
- Test subsequent commands use project from user context

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

gsd-openclaw/tests/test_orchestrator.py

@@ -725,3 +725,125 @@ class TestSpecialCommands:
         orch.formatter.format_error.assert_called_once()
         call_args = orch.formatter.format_error.call_args
         assert "Project name" in str(call_args)
+
+    # ===== Task 2: /gsd:use command tests =====
+
+    def test_use_project_updates_user_context(self, orchestrator_with_mocks):
+        """_handle_use_project should update user context to new project."""
+        from gsd_openclaw.tmux_session import TmuxSession
+
+        orch = orchestrator_with_mocks
+
+        mock_session = MagicMock(spec=TmuxSession)
+        mock_session.session_id = "test-123"
+        orch.tmux_manager.get_session.return_value = mock_session
+
+        orch.formatter.format_success.return_value = {"card": "success"}
+
+        result = orch._handle_use_project("user1", "existing-project")
+
+        # Verify user context was updated
+        user_ctx = orch._get_user_context_manager("user1")
+        assert user_ctx.get_current_project() == "existing-project"
+
+    def test_use_project_returns_success_when_project_exists(self, orchestrator_with_mocks):
+        """_handle_use_project should return success card when project exists."""
+        from gsd_openclaw.tmux_session import TmuxSession
+
+        orch = orchestrator_with_mocks
+
+        mock_session = MagicMock(spec=TmuxSession)
+        mock_session.session_id = "test-123"
+        orch.tmux_manager.get_session.return_value = mock_session
+
+        orch.formatter.format_success.return_value = {"card": "success"}
+
+        result = orch._handle_use_project("user1", "existing-project")
+
+        orch.formatter.format_success.assert_called_once()
+
+    def test_use_project_returns_error_with_button_when_not_exists(self, orchestrator_with_mocks):
+        """_handle_use_project should return error card with Create button when project doesn't exist."""
+        from gsd_openclaw.response_formatter import CardButton
+
+        orch = orchestrator_with_mocks
+
+        orch.tmux_manager.get_session.return_value = None
+
+        orch.formatter.format_error.return_value = {"card": "error"}
+
+        result = orch._handle_use_project("user1", "nonexistent-project")
+
+        # Verify error card was returned with buttons
+        orch.formatter.format_error.assert_called_once()
+        call_args = orch.formatter.format_error.call_args
+        # Check that buttons argument was passed
+        assert call_args[1].get("buttons") is not None
+
+    def test_handle_message_routes_use_command(self, orchestrator_with_mocks):
+        """handle_message should route 'use' command to _handle_use_project."""
+        from gsd_openclaw.tmux_session import TmuxSession
+
+        orch = orchestrator_with_mocks
+
+        mock_session = MagicMock(spec=TmuxSession)
+        mock_session.session_id = "test-123"
+        orch.tmux_manager.get_session.return_value = mock_session
+
+        orch.formatter.format_success.return_value = {"card": "success"}
+
+        # Patch _handle_use_project to verify it's called
+        with patch.object(orch, '_handle_use_project', return_value={"card": "mocked"}) as mock_handler:
+            result = orch.handle_message(
+                user_id="user1",
+                message="/gsd:use my-project",
+                channel="test-channel",
+                context={}
+            )
+
+            mock_handler.assert_called_once_with("user1", "my-project")
+
+    def test_use_project_with_no_args_returns_error(self, orchestrator_with_mocks):
+        """_handle_use_project with no args should return error card."""
+        orch = orchestrator_with_mocks
+
+        orch.formatter.format_error.return_value = {"card": "error"}
+
+        result = orch._handle_use_project("user1", "")
+
+        orch.formatter.format_error.assert_called_once()
+        call_args = orch.formatter.format_error.call_args
+        assert "Project name" in str(call_args)
+
+    def test_subsequent_commands_use_project_from_user_context(self, orchestrator_with_mocks):
+        """Generic commands should use project from user context after /gsd:use."""
+        from gsd_openclaw.tmux_session import TmuxSession
+
+        orch = orchestrator_with_mocks
+
+        # First set up user context with a project
+        user_ctx = orch._get_user_context_manager("user1")
+        user_ctx.set_current_project("context-project")
+
+        mock_session = MagicMock(spec=TmuxSession)
+        mock_session.session_id = "test-123"
+        orch.tmux_manager.get_session.return_value = mock_session
+
+        orch.executor.execute.return_value = CommandResult(
+            output="Status: OK",
+            completed=True,
+            has_error=False,
+            error_type=None
+        )
+        orch.formatter.format_success.return_value = {"card": "success"}
+
+        # Call a generic command without project in context
+        result = orch.handle_message(
+            user_id="user1",
+            message="/gsd:status",
+            channel="test-channel",
+            context={}  # No project in context
+        )
+
+        # Verify get_session was called with the project from user context
+        orch.tmux_manager.get_session.assert_called_with("context-project")