hedgedoc/cypress/integration/export.spec.ts

const testTitle = 'testContent'
const testContent = `---\ntitle: ${testTitle}\n---\nThis is some test content`

describe('Export', () => {
  beforeEach(() => {
    cy.visit('/n/test')
    cy.get('.btn.active.btn-outline-secondary > i.fa-columns')
      .should('exist')
    cy.get('.CodeMirror textarea')
      .type('{ctrl}a', { force: true })
      .type('{backspace}')
    cy.get('.CodeMirror textarea')
      .type(testContent)
  })

  it('Markdown', () => {
    cy.get('#editor-menu-export')
      .click()
    cy.get('a.dropdown-item > i.fa-file-text')
      .click()
    cy.get('a[download]')
      .then((anchor) => (
        new Cypress.Promise((resolve: any, _: any) => {
          // Use XHR to get the blob that corresponds to the object URL.
          const xhr = new XMLHttpRequest();
          xhr.open('GET', anchor.prop('href'), true);
          xhr.responseType = 'blob';

          // Once loaded, use FileReader to get the string back from the blob.
          xhr.onload = () => {
            if (xhr.status === 200) {
              const blob = xhr.response;
              const reader = new FileReader();
              reader.onload = () => {
                // Once we have a string, resolve the promise to let
                // the Cypress chain continue, e.g. to assert on the result.
                resolve(reader.result);
              };
              reader.readAsText(blob);
            }
          };
          xhr.send();
        })
      ))
      // Now the regular Cypress assertions should work.
      .should('equal', testContent);
  })
})