overleaf/server-ce/test/helpers/email.ts

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/**
* Helper function for opening an email in Roundcube based mailtrap.
* We need to cross an origin boundary, which complicates the use of variables.
* Any variables need to be explicitly defined and the "runner" may only reference these and none from its scope.
* It is not possible to use Cypress helper functions, e.g. from the testing library or other functions like "activateUser", inside the "runner".
* REF: https://github.com/testing-library/cypress-testing-library/issues/221
*/
export function openEmail<T>(
subject: string | RegExp,
runner: (frame: Cypress.Chainable<JQuery<any>>, args: T) => void,
args?: T
) {
const runnerS = runner.toString()
cy.origin(
Cypress.env('MAILTRAP_URL') || 'http://mailtrap',
{ args: { args, runnerS, subject } },
({ args, runnerS, subject }) => {
cy.visit('/')
cy.get('input[name="_user"]').type('mailtrap')
cy.get('input[name="_pass"]').type('password-for-mailtrap')
cy.get('button[type="submit"]').click()
cy.url().then(url => {
if (!url.includes('?_task=login')) return
cy.log('mailtrap login is flaky in cypress, submit again')
cy.get('input[name="_pass"]').type('password-for-mailtrap')
cy.get('button[type="submit"]').click()
})
// Use force as the subject is partially hidden
cy.contains(subject).click({ force: true })
cy.log('wait for iframe loading')
cy.wait(1000)
cy.get('iframe[id="messagecontframe"]').then(frame => {
// runnerS='(frame, args) => { runner body }'. Extract the runnable function.
const runner = new Function('return ' + runnerS)()
runner(cy.wrap(frame.prop('contentWindow').document.body), args)
})
}
)
}