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* @license
* Copyright 2026 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect } from 'vitest';
import { z } from 'zod';
import { SdkTool, tool, ModelVisibleError } from './tool.js';
import type { MessageBus } from '@google/gemini-cli-core';
// Mock MessageBus
const mockMessageBus = {} as unknown as MessageBus;
describe('tool()', () => {
it('creates a tool definition with defaults', () => {
const definition = tool(
{
name: 'testTool',
description: 'A test tool',
inputSchema: z.object({ foo: z.string() }),
},
async () => 'result',
);
expect(definition.name).toBe('testTool');
expect(definition.description).toBe('A test tool');
expect(definition.sendErrorsToModel).toBeUndefined();
});
it('creates a tool definition with explicit configuration', () => {
const definition = tool(
{
name: 'testTool',
description: 'A test tool',
inputSchema: z.object({ foo: z.string() }),
sendErrorsToModel: true,
},
async () => 'result',
);
expect(definition.sendErrorsToModel).toBe(true);
});
});
describe('SdkTool Execution', () => {
it('executes successfully', async () => {
const definition = tool(
{
name: 'successTool',
description: 'Always succeeds',
inputSchema: z.object({ val: z.string() }),
},
async ({ val }) => `Success: ${val}`,
);
const sdkTool = new SdkTool(definition, mockMessageBus);
const invocation = sdkTool.createInvocationWithContext(
{ val: 'test' },
mockMessageBus,
undefined,
);
const result = await invocation.execute({
abortSignal: new AbortController().signal,
});
expect(result.llmContent).toBe('Success: test');
expect(result.error).toBeUndefined();
});
it('throws standard Error by default', async () => {
const definition = tool(
{
name: 'failTool',
description: 'Always fails',
inputSchema: z.object({}),
},
async () => {
throw new Error('Standard error');
},
);
const sdkTool = new SdkTool(definition, mockMessageBus);
const invocation = sdkTool.createInvocationWithContext(
{},
mockMessageBus,
undefined,
);
await expect(
invocation.execute({ abortSignal: new AbortController().signal }),
).rejects.toThrow('Standard error');
});
it('catches ModelVisibleError and returns ToolResult error', async () => {
const definition = tool(
{
name: 'visibleErrorTool',
description: 'Fails with visible error',
inputSchema: z.object({}),
},
async () => {
throw new ModelVisibleError('Visible error');
},
);
const sdkTool = new SdkTool(definition, mockMessageBus);
const invocation = sdkTool.createInvocationWithContext(
{},
mockMessageBus,
undefined,
);
const result = await invocation.execute({
abortSignal: new AbortController().signal,
});
expect(result.error).toBeDefined();
expect(result.error?.message).toBe('Visible error');
expect(result.llmContent).toContain('Error: Visible error');
});
it('catches standard Error when sendErrorsToModel is true', async () => {
const definition = tool(
{
name: 'catchAllTool',
description: 'Catches all errors',
inputSchema: z.object({}),
sendErrorsToModel: true,
},
async () => {
throw new Error('Standard error');
},
);
const sdkTool = new SdkTool(definition, mockMessageBus);
const invocation = sdkTool.createInvocationWithContext(
{},
mockMessageBus,
undefined,
);
const result = await invocation.execute({
abortSignal: new AbortController().signal,
});
expect(result.error).toBeDefined();
expect(result.error?.message).toBe('Standard error');
expect(result.llmContent).toContain('Error: Standard error');
});
});
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