src/async-generators/default/async-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/async-gen-private-method/
name: Async generator method as a ClassExpression element
esid: prod-AsyncGeneratorPrivateMethod
info: |
  ClassElement :
    PrivateMethodDefinition

  MethodDefinition :
    AsyncGeneratorMethod

  Async Generator Function Definitions

  AsyncGeneratorMethod :
    async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }
features: [async-iteration, class-methods-private]
---*/

var callCount = 0;

var C = class {
    async *#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"),
  "#gen does not appear as an own property on C prototype"
);
assert(
  !Object.prototype.hasOwnProperty.call(C, "#gen"),
  "#gen does not appear as an own property on C constructor"
);
assert(
  !Object.prototype.hasOwnProperty.call(c, "#gen"),
  "#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"),
  "#gen does not appear as an own property on C prototype"
);
assert(
  !Object.prototype.hasOwnProperty.call(C, "#gen"),
  "#gen does not appear as an own property on C constructor"
);
assert(
  !Object.prototype.hasOwnProperty.call(c, "#gen"),
  "#gen does not appear as an own property on C instance"
);