src/generators/default/class-expr-private-method.template

// Copyright (C) 2018 Bloomberg LP. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/class/elements/gen-private-method/
name: Generator private method as a ClassExpression element
esid: prod-GeneratorPrivateMethod
info: |
  ClassElement :
    PrivateMethodDefinition

  MethodDefinition :
    GeneratorMethod

  14.4 Generator Function Definitions

  GeneratorMethod :
    * PropertyName ( UniqueFormalParameters ) { GeneratorBody }
features: [generators, class-methods-private]
---*/

var callCount = 0;

var C = class {
    *#gen() {
        callCount += 1;
        /*{ body }*/
    }
    get gen() { return this.#gen; }
}

const c = new C();

// Test the private fields do not appear as properties before set to value
assert(
  !Object.prototype.hasOwnProperty.call(C.prototype, "#gen"),
  "Private field '#gen' does not appear as an own property on C prototype"
);
assert(
  !Object.prototype.hasOwnProperty.call(C, "#gen"),
  "Private field '#gen' does not appear as an own property on C constructor"
);
assert(
  !Object.prototype.hasOwnProperty.call(c, "#gen"),
  "Private field '#gen' does not appear as an own property on C instance"
);

var iter = c.gen();

/*{ assertions }*/

assert.sameValue(callCount, 1);

// Test the private fields do not appear as properties after set to value
assert(
  !Object.prototype.hasOwnProperty.call(C.prototype, "#gen"),
  "Private field '#gen' does not appear as an own property on C prototype"
);
assert(
  !Object.prototype.hasOwnProperty.call(C, "#gen"),
  "Private field '#gen' does not appear as an own property on C constructor"
);
assert(
  !Object.prototype.hasOwnProperty.call(c, "#gen"),
  "Private field '#gen' does not appear as an own property on C instance"
);