same-line-method-static-private-fields.js (2016B)
1 // This file was procedurally generated from the following sources: 2 // - src/class-elements/static-private-fields.case 3 // - src/class-elements/productions/cls-expr-same-line-method.template 4 /*--- 5 description: static private fields (field definitions followed by a method in the same line) 6 esid: prod-FieldDefinition 7 features: [class-static-fields-private, class, class-fields-public] 8 flags: [generated] 9 includes: [propertyHelper.js] 10 info: | 11 ClassElement : 12 ... 13 static FieldDefinition ; 14 15 FieldDefinition : 16 ClassElementName Initializer_opt 17 18 ClassElementName : 19 PrivateName 20 21 PrivateName : 22 # IdentifierName 23 24 ---*/ 25 26 27 var C = class { 28 static #x; static #y; m() { return 42; } 29 static x() { 30 this.#x = 42; 31 return this.#x; 32 } 33 static y() { 34 this.#y = 43; 35 return this.#y; 36 } 37 } 38 39 var c = new C(); 40 41 assert.sameValue(c.m(), 42); 42 assert.sameValue(c.m, C.prototype.m); 43 assert( 44 !Object.prototype.hasOwnProperty.call(c, "m"), 45 "m doesn't appear as an own property on the C instance" 46 ); 47 48 verifyProperty(C.prototype, "m", { 49 enumerable: false, 50 configurable: true, 51 writable: true, 52 }); 53 54 // Test the private fields do not appear as properties before set to value 55 assert(!Object.prototype.hasOwnProperty.call(C.prototype, "#x"), "test 1"); 56 assert(!Object.prototype.hasOwnProperty.call(C, "#x"), "test 2"); 57 assert(!Object.prototype.hasOwnProperty.call(c, "#x"), "test 3"); 58 59 assert(!Object.prototype.hasOwnProperty.call(C.prototype, "#y"), "test 4"); 60 assert(!Object.prototype.hasOwnProperty.call(C, "#y"), "test 5"); 61 assert(!Object.prototype.hasOwnProperty.call(c, "#y"), "test 6"); 62 63 // Test if private fields can be sucessfully accessed and set to value 64 assert.sameValue(C.x(), 42, "test 7"); 65 assert.sameValue(C.y(), 43, "test 8"); 66 67 // Test the private fields do not appear as properties before after set to value 68 assert(!Object.prototype.hasOwnProperty.call(C, "#x"), "test 9"); 69 assert(!Object.prototype.hasOwnProperty.call(C, "#y"), "test 10"); 70 71 reportCompare(0, 0);