Merge pull request #4 from kubo39/set-visited-flag-true-when-the-key-…

…is-updated

Fix: set node.visited true when the entry is updated

src/sieve_cache.nim

@@ -130,7 +130,9 @@ proc del*[K, V](cache: Cache[K, V], k: K): V =
 
 proc add*[K, V](cache: Cache[K, V], k: K, v: sink V) =
   if cache.has(k):
-    cache.getNodeFromStore(k).value = v
+    let node = cache.getNodeFromStore(k)
+    node.visited = true
+    node.value = v
   else:
     let node = Node[K, V](key: k, value: v)
     cache.addNodeToStore(node)

tests/tsieve_cache.nim

@@ -32,3 +32,13 @@ test "chain":
   cache["baz"] = 42
   for node in cache.chain:
     discard $node
+
+test "update visited flag when the entry is updated":
+  let cache = newCache[string, string](2)
+  cache["key1"] = "value1"
+  cache["key2"] = "value2"
+  # update `key1` entry.
+  cache["key1"] = "updated"
+  # add new entry.
+  cache["key3"] = "value3"
+  check cache.has("key1")