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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect } from 'vitest';
import { renderHook, act } from '@testing-library/react';
import { useHistoryManager } from './useHistoryManager.js';
import { HistoryItem } from '../types.js';
describe('useHistoryManager', () => {
it('should initialize with an empty history', () => {
const { result } = renderHook(() => useHistoryManager());
expect(result.current.history).toEqual([]);
});
it('should add an item to history with a unique ID', () => {
const { result } = renderHook(() => useHistoryManager());
const timestamp = Date.now();
const itemData: Omit<HistoryItem, 'id'> = {
type: 'user', // Replaced HistoryItemType.User
text: 'Hello',
};
act(() => {
result.current.addItemToHistory(itemData, timestamp);
});
expect(result.current.history).toHaveLength(1);
expect(result.current.history[0]).toEqual(
expect.objectContaining({
...itemData,
id: expect.any(Number),
}),
);
// Basic check that ID incorporates timestamp
expect(result.current.history[0].id).toBeGreaterThanOrEqual(timestamp);
});
it('should generate unique IDs for items added with the same base timestamp', () => {
const { result } = renderHook(() => useHistoryManager());
const timestamp = Date.now();
const itemData1: Omit<HistoryItem, 'id'> = {
type: 'user', // Replaced HistoryItemType.User
text: 'First',
};
const itemData2: Omit<HistoryItem, 'id'> = {
type: 'gemini', // Replaced HistoryItemType.Gemini
text: 'Second',
};
let id1!: number;
let id2!: number;
act(() => {
id1 = result.current.addItemToHistory(itemData1, timestamp);
id2 = result.current.addItemToHistory(itemData2, timestamp);
});
expect(result.current.history).toHaveLength(2);
expect(id1).not.toEqual(id2);
expect(result.current.history[0].id).toEqual(id1);
expect(result.current.history[1].id).toEqual(id2);
// IDs should be sequential based on the counter
expect(id2).toBeGreaterThan(id1);
});
it('should update an existing history item', () => {
const { result } = renderHook(() => useHistoryManager());
const timestamp = Date.now();
const initialItem: Omit<HistoryItem, 'id'> = {
type: 'gemini', // Replaced HistoryItemType.Gemini
text: 'Initial content',
};
let itemId!: number;
act(() => {
itemId = result.current.addItemToHistory(initialItem, timestamp);
});
const updatedText = 'Updated content';
act(() => {
result.current.updateHistoryItem(itemId, { text: updatedText });
});
expect(result.current.history).toHaveLength(1);
expect(result.current.history[0]).toEqual({
...initialItem,
id: itemId,
text: updatedText,
});
});
it('should not change history if updateHistoryItem is called with a non-existent ID', () => {
const { result } = renderHook(() => useHistoryManager());
const timestamp = Date.now();
const itemData: Omit<HistoryItem, 'id'> = {
type: 'user', // Replaced HistoryItemType.User
text: 'Hello',
};
act(() => {
result.current.addItemToHistory(itemData, timestamp);
});
const originalHistory = [...result.current.history]; // Clone before update attempt
act(() => {
result.current.updateHistoryItem(99999, { text: 'Should not apply' }); // Non-existent ID
});
expect(result.current.history).toEqual(originalHistory);
});
it('should clear the history', () => {
const { result } = renderHook(() => useHistoryManager());
const timestamp = Date.now();
const itemData1: Omit<HistoryItem, 'id'> = {
type: 'user', // Replaced HistoryItemType.User
text: 'First',
};
const itemData2: Omit<HistoryItem, 'id'> = {
type: 'gemini', // Replaced HistoryItemType.Gemini
text: 'Second',
};
act(() => {
result.current.addItemToHistory(itemData1, timestamp);
result.current.addItemToHistory(itemData2, timestamp);
});
expect(result.current.history).toHaveLength(2);
act(() => {
result.current.clearHistory();
});
expect(result.current.history).toEqual([]);
});
});
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