1 Tests for ES6 class syntax default constructor 2 3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". 4 5 6 PASS new A instanceof A is true 7 PASS A() threw exception TypeError: Class constructor A cannot be invoked without 'new'. 8 PASS A.prototype.constructor instanceof Function is true 9 PASS A.prototype.constructor.name is "A" 10 PASS new B instanceof A; new B instanceof A is true 11 PASS B() threw exception TypeError: Class constructor B cannot be invoked without 'new'. 12 PASS B.prototype.constructor.name is "B" 13 PASS A !== B is true 14 PASS A.prototype.constructor !== B.prototype.constructor is true 15 PASS new (class extends (class { constructor(a, b) { return [a, b]; } }) {})(1, 2) is [1, 2] 16 PASS successfullyParsed is true 17 18 TEST COMPLETE 19
