beforeAfterEach.js

describe("when the stream did start but not end", function() {
  const amount = new BigNumber(5).multipliedBy(1e18).toString(10);

  beforeEach(async function() {
    await web3.utils.advanceBlockAtTime(
      now
        .plus(STANDARD_TIME_OFFSET)
        .plus(5)
        .toNumber(),
    );
  });

  it("test1", function() {});
  
  it("test2", function() {});
  
  it("test3", function() {});

  afterEach(async function() {
    await web3.utils.advanceBlockAtTime(now.toNumber());
  });
});