A test triggers high coverage with no assertions

false-coverage.js

function addNewOrder(newOrder) {
    logger.log(`Adding new order ${newOrder}`);
    DB.save(newOrder);
    Mailer.sendMail(newOrder.assignee, `A new order was places ${newOrder}`);

    return {approved: true};
}

it("Test addNewOrder, don't use such test names", () => {
    addNewOrder({asignee: "John@mailer.com",price: 120});
});//Triggers 100% code coverage, but it doesn't check anything