tor-browser

The Tor Browser
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after-same-line-static-async-gen-static-private-fields.js (2550B)

      1 // |reftest| async
      2 // This file was procedurally generated from the following sources:
      3 // - src/class-elements/static-private-fields.case
      4 // - src/class-elements/productions/cls-decl-after-same-line-static-async-gen.template
      5 /*---
      6 description: static private fields (field definitions after a static async generator in the same line)
      7 esid: prod-FieldDefinition
      8 features: [class-static-fields-private, class, class-fields-public, async-iteration]
      9 flags: [generated, async]
     10 includes: [propertyHelper.js]
     11 info: |
     12    ClassElement :
     13      ...
     14      static FieldDefinition ;
     15 
     16    FieldDefinition :
     17      ClassElementName Initializer_opt
     18 
     19    ClassElementName :
     20      PrivateName
     21 
     22    PrivateName :
     23      # IdentifierName
     24 
     25 ---*/
     26 
     27 
     28 class C {
     29  static async *m() { return 42; } static #x; static #y;
     30  static x() {
     31    this.#x = 42;
     32    return this.#x;
     33  }
     34  static y() {
     35    this.#y = 43;
     36    return this.#y;
     37  }
     38 }
     39 
     40 var c = new C();
     41 
     42 assert(
     43  !Object.prototype.hasOwnProperty.call(c, "m"),
     44  "m doesn't appear as an own property on the C instance"
     45 );
     46 assert(
     47  !Object.prototype.hasOwnProperty.call(C.prototype, "m"),
     48  "m doesn't appear as an own property on the C prototype"
     49 );
     50 
     51 verifyProperty(C, "m", {
     52  enumerable: false,
     53  configurable: true,
     54  writable: true,
     55 }, {restore: true});
     56 
     57 C.m().next().then(function(v) {
     58  assert.sameValue(v.value, 42);
     59  assert.sameValue(v.done, true);
     60 
     61  function assertions() {
     62    // Cover $DONE handler for async cases.
     63    function $DONE(error) {
     64      if (error) {
     65        throw new Test262Error('Test262:AsyncTestFailure')
     66      }
     67    }
     68    // Test the private fields do not appear as properties before set to value
     69    assert(!Object.prototype.hasOwnProperty.call(C.prototype, "#x"), "test 1");
     70    assert(!Object.prototype.hasOwnProperty.call(C, "#x"), "test 2");
     71    assert(!Object.prototype.hasOwnProperty.call(c, "#x"), "test 3");
     72 
     73    assert(!Object.prototype.hasOwnProperty.call(C.prototype, "#y"), "test 4");
     74    assert(!Object.prototype.hasOwnProperty.call(C, "#y"), "test 5");
     75    assert(!Object.prototype.hasOwnProperty.call(c, "#y"), "test 6");
     76 
     77    // Test if private fields can be sucessfully accessed and set to value
     78    assert.sameValue(C.x(), 42, "test 7");
     79    assert.sameValue(C.y(), 43, "test 8");
     80 
     81    // Test the private fields do not appear as properties before after set to value
     82    assert(!Object.prototype.hasOwnProperty.call(C, "#x"), "test 9");
     83    assert(!Object.prototype.hasOwnProperty.call(C, "#y"), "test 10");
     84  }
     85 
     86  return Promise.resolve(assertions());
     87 }).then($DONE, $DONE);