describe('[UseCase]', () => {
  it('should [resultado] given [contexto]', async () => {
    const input = Entity.fake().anEntity().build();
    const result = await useCase.execute(input);
    expect(result).toMatchObject({...});
  });
});

Tem side-effect externo (DB, HTTP, evento)?
├─ SIM → INTEGRACAO
└─ NAO → Tem >3 variacoes de input?
         ├─ SIM → UNITARIO com loop + FakeBuilder
         └─ NAO → INTEGRACAO (mais valor)

vi.mock('./repository');
vi.mocked(repository.save).mockResolvedValue(entity);

src/application/__tests__/list-entities.use-case.spec.ts

describe('search with filter and paginate', () => {
  const entities = [
    Entity.fake().anEntity().withName('test').build(),
    Entity.fake().anEntity().withName('TEST').build(),
    Entity.fake().anEntity().withName('TeSt').build(),
  ];

  const arrange = [
    { input: { page: 1, per_page: 2, filter: { name: 'TEST' } }, expected: { total: 3, current_page: 1 } },
    { input: { page: 2, per_page: 2, filter: { name: 'TEST' } }, expected: { total: 3, current_page: 2 } },
  ];

  beforeEach(() => repository.bulkInsert(entities));

  test.each(arrange)('when input is $input', async ({ input, expected }) => {
    const output = await useCase.execute(input);
    expect(output).toMatchObject(expected);
  });
});