Function assert_throws_exactly_impl

deps/v8/test/wasm-js/third_party/testharness.js:1795–1811

* Like assert_throws_exactly but allows specifying the assertion type * (assert_throws_exactly or promise_rejects_exactly, in practice).

(exception, func, description,
                                        assertion_type)

     * (assert_throws_exactly or promise_rejects_exactly, in practice).
     */
    function assert_throws_exactly_impl(exception, func, description,
                                        assertion_type)
    {
        try {
            func.call(this);
            assert(false, assertion_type, description,
                   "${func} did not throw", {func:func});
        } catch (e) {
            if (e instanceof AssertionError) {
                throw e;
            }

            assert(same_value(e, exception), assertion_type, description,
                   "${func} threw ${e} but we expected it to throw ${exception}",
                   {func:func, e:e, exception:exception});
        }
    }

    function assert_unreached(description) {
         assert(false, "assert_unreached", description,