I'm doing a lot of end-to-end testing recently. We have 100% coverage in unit level but every time we run end-to-end tests, a new issue pops up. To my eye, all

I'm doing a lot of end-to-end testing recently. We have 100% coverage in unit level but every time we run end-to-end tests, a new issue pops up. To my eye, all those unit tests are expect(true).toBeTrue() and no more!