Cypress assertion fails but test passes

Question

Doing some integration tests on API. One of the tests passes and the other fails when assertions are basically the same. Confused about how cypress handles async/promises.

context("Login", () => {
  // This test fails
  it("Should return 401, missing credentials", () => {
    cy.request({
      url: "/auth/login",
      method: "POST",
      failOnStatusCode: false
    }).should(({ status, body }) => {
      expect(status).to.eq(401) // Passes
      expect(body).to.have.property("data") // Passes
                  .to.have.property("thisDoesntExist") // Fails
    })
  })
  
  // This test passes
  it("Should return 200 and user object", async () => {
    const token = await cy.task("generateJwt", users[0])
    cy.request({
      url: "/auth/me",
      method: "GET",
      headers: {
        Authorization: `Bearer ${token}`,
        "Content-type": "application/json"
      }
    }).should(({ status, body }) => {
      expect(status).to.eq(200) // Passes
      expect(body).to.have.property("data") // Passes
                  .to.have.property("thisDoesntExist") // Fails
    })
  })
})

EDIT: I fixed it by doing this:

 it("Should return 200 and user object", () => {
    cy.task("generateJwt", users[0]).then((result) => {
      const token = result
      cy.request({
        url: "/auth/me",
        method: "GET",
        headers: {
          Authorization: `Bearer ${token}`,
          "Content-type": "application/json"
        }
      }).should(({ status, body }) => {
        expect(status).to.eq(200)
        expect(body)
          .to.have.property("data")
          .to.have.property("thisDoesntExist")
      })
    })
  })

Why does it pass when using async/await?

If you click on the request, it should write the details to the Dev Tools console, including the response. What does the response look like? — MetaWhirledPeas

Jonah Jonah · Accepted Answer · 2021-01-18T07:25:45

I see that you manage to fix your code. About the async/await - Cypress does not support it. See https://docs.cypress.io/guides/core-concepts/introduction-to-cypress.html#Commands-Are-Asynchronous.

In general, Cypress queue all the actions and then execute them. So if your code has any synchronous part it will not work. Also, they're not supporting the async/await feature, so tests using those might be flaky.

Cypress assertion fails but test passes

1 Answers