Function expose_assert

test/fixtures/wpt/resources/testharness.js:1503–1535

(f, name)

     */

    function expose_assert(f, name) {
        function assert_wrapper(...args) {
            let status = Test.statuses.TIMEOUT;
            let stack = null;
            let new_assert_index = null;
            try {
                if (settings.debug) {
                    console.debug("ASSERT", name, tests.current_test && tests.current_test.name, args);
                }
                if (tests.output) {
                    tests.set_assert(name, args);
                    // Remember the newly pushed assert's index, because `apply`
                    // below might push new asserts.
                    new_assert_index = tests.asserts_run.length - 1;
                }
                const rv = f.apply(undefined, args);
                status = Test.statuses.PASS;
                return rv;
            } catch(e) {
                status = Test.statuses.FAIL;
                stack = e.stack ? e.stack : null;
                throw e;
            } finally {
                if (tests.output && !stack) {
                    stack = get_stack();
                }
                if (tests.output) {
                    tests.set_assert_status(new_assert_index, status, stack);
                }
            }
        }
        expose(assert_wrapper, name);
    }

    /**
     * Assert that ``actual`` is strictly true