Getting “Error: Resolution method is overspecified”? in beforeEach and afterEach

Question

When I use done in beforeEach or afterEach I get this error “Error: Resolution method is overspecified” and the test fails.

But now if remove the done() all my tests pass but the terminal hangs without exiting the test script.

I am using knex.js as a query builder.

Is there a solution to this problem?

beforeEach(async (done) => {
  await db.migrate.rollback(migrationConfig);
  await db.migrate.latest(migrationConfig);
  await db.seed.run(seedConfig);
  done();
});

// cleaning db before running tests
afterEach(async (done) => {
  await db.migrate.rollback(migrationConfig);
  done();
});

describe("POST /user/login", () => {
  it("should return a jwt after loging in user", (done) => {
    chai
      .request(server)
      .post("/user/login")
      .send({
        email: "[email protected]",
        password: "test123",
      })
      .end((err, res) => {
        res.should.have.status(200);
        res.should.be.json;
        res.body.should.have.property("token");
        done();
      });
  });
});

Answer 1

If you are using async handler functions, then you should not give it parameter done. Promise returned by async function will tell Mocha when executing the function is ready.

beforeEach(async () => {
  await db.migrate.rollback(migrationConfig);
  await db.migrate.latest(migrationConfig);
  await db.seed.run(seedConfig);
});

// cleaning db before running tests
afterEach(async () => {
  await db.migrate.rollback(migrationConfig);
});