Assertion diff is not shown when an assertion fails and is retried

[chrisbreiding]

Current behavior:

When an assertion is retried (using cy.should()) and fails, it does not show a diff in the stdout. If the same assertion is not retried, it will show the diff.

Desired behavior:

Failing assertions should show diffs in the stdout regardless of whether they are retried or not.

Test code to reproduce

This works properly and shows what the diff should look like.

it('non-dom - fails without retry', () => {
  expect([]).to.eql([1, 2, 3])
})

This demonstrates the issue.

it('non-dom - fails with retry', () => {
  cy.wrap([]).should('eql', [1, 2, 3])
})

Versions

Cypress 4.1.0

[cypress-bot]

The code for this is done in cypress-io/cypress#6467, but has yet to be released.
We'll update this issue and reference the changelog when it's released.

[cypress-bot]

The code for this is done in cypress-io/cypress#6724, but has yet to be released.
We'll update this issue and reference the changelog when it's released.

[cypress-bot]

Released in 4.3.0.

This comment thread has been locked. If you are still experiencing this issue after upgrading to
Cypress v4.3.0, please open a new issue.