test: add ResourceTable tests (denoland#4185)

core/resources.rs

@@ -83,3 +83,60 @@ impl ResourceTable {
 pub trait Resource: Downcast + Any + Send {}
 impl<T> Resource for T where T: Downcast + Any + Send {}
 impl_downcast!(Resource);
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+
+ struct FakeResource {
+ not_empty: u128,
+ }
+
+ impl FakeResource {
+ fn new(value: u128) -> FakeResource {
+ FakeResource { not_empty: value }
+ }
+ }
+
+ #[test]
+ fn test_create_resource_table_default() {
+ let table = ResourceTable::default();
+ assert_eq!(table.map.len(), 0);
+ }
+
+ #[test]
+ fn test_add_to_resource_table_not_empty() {
+ let mut table = ResourceTable::default();
+ table.add("fake1", Box::new(FakeResource::new(1)));
+ table.add("fake2", Box::new(FakeResource::new(2)));
+ assert_eq!(table.map.len(), 2);
+ }
+
+ #[test]
+ fn test_add_to_resource_table_are_contiguous() {
+ let mut table = ResourceTable::default();
+ let rid1 = table.add("fake1", Box::new(FakeResource::new(1)));
+ let rid2 = table.add("fake2", Box::new(FakeResource::new(2)));
+ assert_eq!(rid1 + 1, rid2);
+ }
+
+ #[test]
+ fn test_get_from_resource_table_is_what_was_given() {
+ let mut table = ResourceTable::default();
+ let rid = table.add("fake", Box::new(FakeResource::new(7)));
+ let resource = table.get::<FakeResource>(rid);
+ assert_eq!(resource.unwrap().not_empty, 7);
+ }
+
+ #[test]
+ fn test_remove_from_resource_table() {
+ let mut table = ResourceTable::default();
+ let rid1 = table.add("fake1", Box::new(FakeResource::new(1)));
+ let rid2 = table.add("fake2", Box::new(FakeResource::new(2)));
+ assert_eq!(table.map.len(), 2);
+ table.close(rid1);
+ assert_eq!(table.map.len(), 1);
+ table.close(rid2);
+ assert_eq!(table.map.len(), 0);
+ }
+}