Interactor.js

Not

#assert.not

The not prefix can be used before any assertion and will negate the results of that assertion.

await new Interactor('.signup-form')
  .assert.not.disabled('input.email')
  .assert.not.matches('.has-errors')

When a custom assertion is negated, a generic error will be thrown unless the custom assertion returns an object consisting of a result and an error message. This error message is assumed to account for the results of the validation.

@interactor class FormInteractor {
  static assertions = {
    hasErrors() {
      let hasErrors = this.matches('.has-errors');

      return {
        result: hasErrors,
        message: () => {
          if (hasErrors) {
            return 'there were errors with the form';
          } else {
            return 'no errors were found';
          }
        }
      }
    }
  }
}

// might throw "no errors were found"
await new FormInteractor('.signup-form')
  .assert.hasErrors()

// might throw "there were errors with the form"
await new FormInteractor('.signup-form')
  .assert.not.hasErrors()
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