src/class-elements/private-field-access-on-inner-arrow-function.case

// Copyright (C) 2019 Caio Lima (Igalia SL). All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
desc: PrivateName of private field is visible on inner arrow function of class scope
info: |
  Updated Productions

  CallExpression[Yield, Await]:
    CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await]
    SuperCall[?Yield, ?Await]
    CallExpression[?Yield, ?Await]Arguments[?Yield, ?Await]
    CallExpression[?Yield, ?Await][Expression[+In, ?Yield, ?Await]]
    CallExpression[?Yield, ?Await].IdentifierName
    CallExpression[?Yield, ?Await]TemplateLiteral[?Yield, ?Await]
    CallExpression[?Yield, ?Await].PrivateName

template: default
features: [class-fields-private]
---*/

//- elements
#f = 'Test262';

method() {
  let arrowFunction = () => {
    return this.#f;
  }

  return arrowFunction();
}
//- assertions
let c = new C();
assert.sameValue(c.method(), 'Test262');
let o = {};
assert.throws(TypeError, function() {
  c.method.call(o);
}, 'accessed private field from an ordinary object');