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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { renderHook, act } from '@testing-library/react';
import { useMessageQueue } from './useMessageQueue.js';
import { StreamingState } from '../types.js';
describe('useMessageQueue', () => {
let mockSubmitQuery: ReturnType<typeof vi.fn>;
beforeEach(() => {
mockSubmitQuery = vi.fn();
vi.useFakeTimers();
});
afterEach(() => {
vi.useRealTimers();
vi.clearAllMocks();
});
it('should initialize with empty queue', () => {
const { result } = renderHook(() =>
useMessageQueue({
streamingState: StreamingState.Idle,
submitQuery: mockSubmitQuery,
}),
);
expect(result.current.messageQueue).toEqual([]);
expect(result.current.getQueuedMessagesText()).toBe('');
});
it('should add messages to queue', () => {
const { result } = renderHook(() =>
useMessageQueue({
streamingState: StreamingState.Responding,
submitQuery: mockSubmitQuery,
}),
);
act(() => {
result.current.addMessage('Test message 1');
result.current.addMessage('Test message 2');
});
expect(result.current.messageQueue).toEqual([
'Test message 1',
'Test message 2',
]);
});
it('should filter out empty messages', () => {
const { result } = renderHook(() =>
useMessageQueue({
streamingState: StreamingState.Responding,
submitQuery: mockSubmitQuery,
}),
);
act(() => {
result.current.addMessage('Valid message');
result.current.addMessage(' '); // Only whitespace
result.current.addMessage(''); // Empty
result.current.addMessage('Another valid message');
});
expect(result.current.messageQueue).toEqual([
'Valid message',
'Another valid message',
]);
});
it('should clear queue', () => {
const { result } = renderHook(() =>
useMessageQueue({
streamingState: StreamingState.Responding,
submitQuery: mockSubmitQuery,
}),
);
act(() => {
result.current.addMessage('Test message');
});
expect(result.current.messageQueue).toEqual(['Test message']);
act(() => {
result.current.clearQueue();
});
expect(result.current.messageQueue).toEqual([]);
});
it('should return queued messages as text with double newlines', () => {
const { result } = renderHook(() =>
useMessageQueue({
streamingState: StreamingState.Responding,
submitQuery: mockSubmitQuery,
}),
);
act(() => {
result.current.addMessage('Message 1');
result.current.addMessage('Message 2');
result.current.addMessage('Message 3');
});
expect(result.current.getQueuedMessagesText()).toBe(
'Message 1\n\nMessage 2\n\nMessage 3',
);
});
it('should auto-submit queued messages when transitioning to Idle', () => {
const { result, rerender } = renderHook(
({ streamingState }) =>
useMessageQueue({
streamingState,
submitQuery: mockSubmitQuery,
}),
{
initialProps: { streamingState: StreamingState.Responding },
},
);
// Add some messages
act(() => {
result.current.addMessage('Message 1');
result.current.addMessage('Message 2');
});
expect(result.current.messageQueue).toEqual(['Message 1', 'Message 2']);
// Transition to Idle
rerender({ streamingState: StreamingState.Idle });
expect(mockSubmitQuery).toHaveBeenCalledWith('Message 1\n\nMessage 2');
expect(result.current.messageQueue).toEqual([]);
});
it('should not auto-submit when queue is empty', () => {
const { rerender } = renderHook(
({ streamingState }) =>
useMessageQueue({
streamingState,
submitQuery: mockSubmitQuery,
}),
{
initialProps: { streamingState: StreamingState.Responding },
},
);
// Transition to Idle with empty queue
rerender({ streamingState: StreamingState.Idle });
expect(mockSubmitQuery).not.toHaveBeenCalled();
});
it('should not auto-submit when not transitioning to Idle', () => {
const { result, rerender } = renderHook(
({ streamingState }) =>
useMessageQueue({
streamingState,
submitQuery: mockSubmitQuery,
}),
{
initialProps: { streamingState: StreamingState.Responding },
},
);
// Add messages
act(() => {
result.current.addMessage('Message 1');
});
// Transition to WaitingForConfirmation (not Idle)
rerender({ streamingState: StreamingState.WaitingForConfirmation });
expect(mockSubmitQuery).not.toHaveBeenCalled();
expect(result.current.messageQueue).toEqual(['Message 1']);
});
it('should handle multiple state transitions correctly', () => {
const { result, rerender } = renderHook(
({ streamingState }) =>
useMessageQueue({
streamingState,
submitQuery: mockSubmitQuery,
}),
{
initialProps: { streamingState: StreamingState.Idle },
},
);
// Start responding
rerender({ streamingState: StreamingState.Responding });
// Add messages while responding
act(() => {
result.current.addMessage('First batch');
});
// Go back to idle - should submit
rerender({ streamingState: StreamingState.Idle });
expect(mockSubmitQuery).toHaveBeenCalledWith('First batch');
expect(result.current.messageQueue).toEqual([]);
// Start responding again
rerender({ streamingState: StreamingState.Responding });
// Add more messages
act(() => {
result.current.addMessage('Second batch');
});
// Go back to idle - should submit again
rerender({ streamingState: StreamingState.Idle });
expect(mockSubmitQuery).toHaveBeenCalledWith('Second batch');
expect(mockSubmitQuery).toHaveBeenCalledTimes(2);
});
});
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