Main E2E Test Defects: Determinism

Introduction

Recalling the signup flow E2E test:

context("Signup flow", () => {
  it("The happy path should work", () => {
    cy.visit("/register");
    cy.get(".form-control").then($els => {
      cy.get($els[0]).type("Tester");
      cy.get($els[1]).type("user@realworld.io");
      cy.get($els[2]).type("mysupersecretpassword");
    });
    cy.get("button").click();
    cy.contains("No articles are here").should("be.visible");
  });
});

This test contains many problems.

The test is not deterministic, meaning its behavior is not the same every time we restart the test.