| Tests for ES6 class syntax default constructor | 
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 | On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | 
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 | PASS new A instanceof A is true | 
 | PASS A() threw exception TypeError: Class constructor A cannot be invoked without 'new'. | 
 | PASS A.prototype.constructor instanceof Function is true | 
 | PASS A.prototype.constructor.name is "A" | 
 | PASS new B instanceof A; new B instanceof A is true | 
 | PASS B() threw exception TypeError: Class constructor B cannot be invoked without 'new'. | 
 | PASS B.prototype.constructor.name is "B" | 
 | PASS A !== B is true | 
 | PASS A.prototype.constructor !== B.prototype.constructor is true | 
 | PASS new (class extends (class { constructor(a, b) { return [a, b]; } }) {})(1, 2) is [1, 2] | 
 | PASS successfullyParsed is true | 
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 | TEST COMPLETE |