fundamentals__dynamic-tests-from-csv

Dynamic tests from CSV data

Sometimes you want to generate tests dynamically from a CSV file. We cannot load the CSV file directly from the spec file (unless we have a special CSV file bundler), and we cannot use the cy.readFile command - because by then it is too late to define new tests. Thus we need to load the CSV file before the spec file starts.

We can do this from the setupNodeEvents function. It has access to the file system, can load the CSV file, parse it, then set the list of records in the config.env object. This config object will be available in each spec file. You then can get the list of records before the tests are created, see csv-spec.cy.js

// `setupNodeEvents`
const text = fs.readFileSync(filename, 'utf8')
const csv = await neatCSV(text)
config.env.usersList = csv
return config

// cypress/e2e/csv-spec.cy.js
const csvUsers = Cypress.env('usersList')

csvUsers.forEach(user => {
  it(`has the user ${user['first name']} ${user['last name']}`, () => {
    ...
  })
})