WeakMap - core tests

test/built-ins/WeakMap/constructor.js

test/built-ins/WeakMap/empty-iterable.js

test/built-ins/WeakMap/get-set-method-failure.js

test/built-ins/WeakMap/iterable-failure.js

test/built-ins/WeakMap/iterable.js

test/built-ins/WeakMap/iterator-close-after-set-failure.js

...t-ins/WeakMap/iterator-item-first-entry-returns-abrupt.js

...-ins/WeakMap/iterator-item-second-entry-returns-abrupt.js

...s/WeakMap/iterator-items-are-not-object-close-iterator.js

test/built-ins/WeakMap/iterator-items-are-not-object.js

test/built-ins/WeakMap/iterator-next-failure.js

test/built-ins/WeakMap/iterator-value-failure.js

test/built-ins/WeakMap/length.js

test/built-ins/WeakMap/name.js

test/built-ins/WeakMap/no-iterable.js

test/built-ins/WeakMap/properties-of-map-instances.js

...ins/WeakMap/properties-of-the-weakmap-prototype-object.js

test/built-ins/WeakMap/prototype-of-weakmap.js

test/built-ins/WeakMap/set-not-callable-throws.js

test/built-ins/WeakMap/undefined-newtarget.js