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* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { act, useCallback } from 'react';
import { vi } from 'vitest';
import { render } from '../../test-utils/render.js';
import {
useConsoleMessages,
useErrorCount,
initializeConsoleStore,
} from './useConsoleMessages.js';
import { coreEvents } from '@google/gemini-cli-core';
vi.mock('@google/gemini-cli-core', async (importOriginal) => {
const actual = await importOriginal();
const handlers = new Map<string, (payload: unknown) => void>();
return {
...(actual as Record<string, unknown>),
coreEvents: {
...((actual as Record<string, unknown>)['coreEvents'] as Record<
string,
unknown
>),
on: vi.fn((event: string, handler: (payload: unknown) => void) => {
handlers.set(event, handler);
}),
off: vi.fn((event: string) => {
handlers.delete(event);
}),
// Helper for testing to trigger the handlers
_trigger: (event: string, payload: unknown) => {
handlers.get(event)?.(payload);
},
},
};
});
describe('useConsoleMessages', () => {
let unmounts: Array<() => void> = [];
beforeEach(() => {
vi.useFakeTimers();
initializeConsoleStore();
});
afterEach(() => {
for (const unmount of unmounts) {
try {
unmount();
} catch {
// Ignore unmount errors
}
}
unmounts = [];
vi.runOnlyPendingTimers();
vi.useRealTimers();
vi.restoreAllMocks();
});
const useTestableConsoleMessages = () => {
const consoleMessages = useConsoleMessages();
const log = useCallback((content: string) => {
// @ts-expect-error - internal testing helper
coreEvents._trigger('console-log', { type: 'log', content });
}, []);
const error = useCallback((content: string) => {
// @ts-expect-error - internal testing helper
coreEvents._trigger('console-log', { type: 'error', content });
}, []);
const clearConsoleMessages = useCallback(() => {
initializeConsoleStore();
}, []);
return {
consoleMessages,
log,
error,
clearConsoleMessages,
};
};
const renderConsoleMessagesHook = async () => {
let hookResult: ReturnType<typeof useTestableConsoleMessages> | undefined;
function TestComponent() {
hookResult = useTestableConsoleMessages();
return null;
}
const { unmount } = await render(<TestComponent />);
unmounts.push(unmount);
return {
result: {
get current() {
return hookResult!;
},
},
unmount,
};
};
it('should initialize with an empty array of console messages', async () => {
const { result } = await renderConsoleMessagesHook();
expect(result.current.consoleMessages).toEqual([]);
});
it('should add a new message when log is called', async () => {
const { result } = await renderConsoleMessagesHook();
act(() => {
result.current.log('Test message');
vi.runAllTimers();
});
expect(result.current.consoleMessages).toEqual([
{ type: 'log', content: 'Test message', count: 1 },
]);
});
it('should batch and count identical consecutive messages', async () => {
const { result } = await renderConsoleMessagesHook();
act(() => {
result.current.log('Test message');
result.current.log('Test message');
result.current.log('Test message');
vi.runAllTimers();
});
expect(result.current.consoleMessages).toEqual([
{ type: 'log', content: 'Test message', count: 3 },
]);
});
it('should not batch different messages', async () => {
const { result } = await renderConsoleMessagesHook();
act(() => {
result.current.log('First message');
result.current.error('Second message');
vi.runAllTimers();
});
expect(result.current.consoleMessages).toEqual([
{ type: 'log', content: 'First message', count: 1 },
{ type: 'error', content: 'Second message', count: 1 },
]);
});
});
describe('useErrorCount', () => {
let unmounts: Array<() => void> = [];
beforeEach(() => {
vi.useFakeTimers();
initializeConsoleStore();
});
afterEach(() => {
for (const unmount of unmounts) {
try {
unmount();
} catch {
// Ignore unmount errors
}
}
unmounts = [];
vi.runOnlyPendingTimers();
vi.useRealTimers();
vi.restoreAllMocks();
});
const renderErrorCountHook = async () => {
let hookResult: ReturnType<typeof useErrorCount>;
function TestComponent() {
hookResult = useErrorCount();
return null;
}
const { unmount } = await render(<TestComponent />);
unmounts.push(unmount);
return {
result: {
get current() {
return hookResult;
},
},
unmount,
};
};
it('should initialize with an error count of 0', async () => {
const { result } = await renderErrorCountHook();
expect(result.current.errorCount).toBe(0);
});
it('should increment error count when an error is logged', async () => {
const { result } = await renderErrorCountHook();
act(() => {
// @ts-expect-error - internal testing helper
coreEvents._trigger('console-log', { type: 'error', content: 'error' });
vi.runAllTimers();
});
expect(result.current.errorCount).toBe(1);
});
it('should not increment error count for non-error logs', async () => {
const { result } = await renderErrorCountHook();
act(() => {
// @ts-expect-error - internal testing helper
coreEvents._trigger('console-log', { type: 'log', content: 'log' });
vi.runAllTimers();
});
expect(result.current.errorCount).toBe(0);
});
it('should clear the error count', async () => {
const { result } = await renderErrorCountHook();
act(() => {
// @ts-expect-error - internal testing helper
coreEvents._trigger('console-log', { type: 'error', content: 'error' });
vi.runAllTimers();
});
expect(result.current.errorCount).toBe(1);
act(() => {
result.current.clearErrorCount();
});
expect(result.current.errorCount).toBe(0);
});
});
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