Function handle

packages/kosong/test/step.test.ts:255–261

(toolCall: ToolCall)

    const toolset: Toolset = {
      tools: [],
      handle(toolCall: ToolCall): Promise<ToolResult> {
        toolHandleCalls++;
        return Promise.resolve({
          toolCallId: toolCall.id,
          returnValue: toolOk({ output: 'should-never-run' }),
        });
      },
    };

    await expect(step(provider, '', toolset, [])).rejects.toThrow(ChatProviderError);