@Test
public void MapTests() {
assertEquals("store.productsByName.containsKey(a1)",
serialize(store.productsByName.containsKey("")));
assertEquals("store.productsByName.containsValue(a1)",
serialize(store.productsByName.containsValue(new Product())));
assertEquals("store.productsByName.isEmpty()",
serialize(store.productsByName.isEmpty()));
assertEquals("!store.productsByName.isEmpty()",
serialize(store.productsByName.isNotEmpty()));