How can we retrieve the "Content-Length" header in the Cypress testing framework?

Lately, I've been using Cypress for testing my code. However, I encountered an issue where the content-header is missing when running the app on Chrome controlled by Cypress. The response content length plays a crucial role in the functionality of my software as it is used for computations. I am seeking a solution to retrieve the content-length value for writing my tests. The particular section of my test code where this problem arises is shown below:

 cy.get('#setSelectedComponent').click().then(() => {
        cy.contains('Part C').click()
        cy.get('#createInstanceFromAsmTree').click({ force: true })
        cy.get(`[aria-label="Toggle Assembly D"]`).click({ force: true })
        cy.get('#matTreeNode').contains('Part C-1').should('be.visible')
      })

The 'cy.contains('Part C').click()' part is where the absence of content-header causes issues.

javascripttypescripttestingcypressend-to-end

Answer №1

To find out which request(s) are being sent when you select 'Part C', monitor the Network tab and then use cy.intercept() to inspect the request header.

cy.get('#setSelectedComponent').click()
cy.intercept('url-to-intercept').as('url')
cy.contains('Part C').click()
cy.wait('@url')
  // extract the 'Content-Length' header from the request
  .its('request.headers["Content-Length"]')

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