db-mock.test.ts•3.27 kB
/**
* Database mock functionality tests
* Tests that our database mocks work properly for testing
*/
import { describe, test, expect, jest } from '@jest/globals';
import { prisma } from '../utils/db';
// Mock the database module
jest.mock('../utils/db', () => {
return {
db: {
connect: jest.fn().mockResolvedValue(undefined),
disconnect: jest.fn().mockResolvedValue(undefined),
},
prisma: {
article: {
findMany: jest.fn().mockResolvedValue([
{ id: 1, title: 'Test Article 1', content: 'Content 1' },
{ id: 2, title: 'Test Article 2', content: 'Content 2' },
]),
findUnique: jest.fn().mockResolvedValue({ id: 1, title: 'Test Article 1', content: 'Content 1' }),
create: jest.fn().mockResolvedValue({ id: 3, title: 'New Article', content: 'New Content' }),
},
source: {
findMany: jest.fn().mockResolvedValue([
{ id: 1, name: 'Test Source 1', url: 'http://example.com/1' },
{ id: 2, name: 'Test Source 2', url: 'http://example.com/2' },
]),
},
$queryRaw: jest.fn().mockResolvedValue([{ count: 5 }]),
$transaction: jest.fn().mockImplementation(async (cb) => {
try {
return await cb({});
} catch (error) {
throw error;
}
}),
},
};
});
describe('Database Mock Tests', () => {
test('should mock article findMany correctly', async () => {
const articles = await prisma.article.findMany();
expect(Array.isArray(articles)).toBe(true);
expect(articles.length).toBe(2);
expect(articles[0].title).toBe('Test Article 1');
});
test('should mock article findUnique correctly', async () => {
const article = await prisma.article.findUnique({ where: { id: 1 } });
expect(article).toBeDefined();
expect(article.id).toBe(1);
expect(article.title).toBe('Test Article 1');
});
test('should mock article create correctly', async () => {
const newArticle = await prisma.article.create({
data: { title: 'New Article', content: 'New Content' }
});
expect(newArticle).toBeDefined();
expect(newArticle.id).toBe(3);
expect(newArticle.title).toBe('New Article');
});
test('should mock source findMany correctly', async () => {
const sources = await prisma.source.findMany();
expect(Array.isArray(sources)).toBe(true);
expect(sources.length).toBe(2);
expect(sources[0].name).toBe('Test Source 1');
});
test('should mock raw queries correctly', async () => {
const result = await prisma.$queryRaw`SELECT COUNT(*) as count FROM articles`;
expect(result).toBeDefined();
expect(result[0].count).toBe(5);
});
test('should handle transactions correctly', async () => {
const result = await prisma.$transaction(async (tx) => {
// This would normally be a series of operations
return { success: true };
});
expect(result).toEqual({ success: true });
});
test('should handle transaction errors correctly', async () => {
expect.assertions(1);
try {
await prisma.$transaction(async () => {
throw new Error('Test transaction error');
});
} catch (error) {
expect(error.message).toBe('Test transaction error');
}
});
});