Rename enable_healthcheck flag to healthcheck_enable, reorder flags, and update README

metrics/priority_queue_test.go

@@ -0,0 +1,102 @@
+package metrics
+
+import (
+	"testing"
+	"time"
+)
+
+func TestUpdatablePriorityQueue_PushAndPop(t *testing.T) {
+	pq := NewUpdatablePriorityQueue()
+
+	now := time.Now()
+	pq.Update("item1", now.Add(2*time.Second))
+	pq.Update("item2", now.Add(1*time.Second))
+	pq.Update("item3", now.Add(3*time.Second))
+
+	if pq.pq.Len() != 3 {
+		t.Fatalf("Expected length 3, got %d", pq.pq.Len())
+	}
+
+	first := pq.Pop()
+	if first == nil {
+		t.Fatal("Pop returned nil")
+	}
+	if first.Key != "item2" {
+		t.Errorf("Expected first to be item2, got %s", first.Key)
+	}
+
+	second := pq.Pop()
+	if second.Key != "item1" {
+		t.Errorf("Expected second to be item1, got %s", second.Key)
+	}
+
+	third := pq.Pop()
+	if third.Key != "item3" {
+		t.Errorf("Expected third to be item3, got %s", third.Key)
+	}
+
+	if pq.Pop() != nil {
+		t.Error("Expected pop on empty pq to return nil")
+	}
+}
+
+func TestUpdatablePriorityQueue_UpdateExisting(t *testing.T) {
+	pq := NewUpdatablePriorityQueue()
+
+	now := time.Now()
+	pq.Update("item1", now.Add(2*time.Second))
+	pq.Update("item2", now.Add(3*time.Second))
+
+	// Update item2 to have an earlier time
+	pq.Update("item2", now.Add(1*time.Second))
+
+	first := pq.Peek()
+	if first == nil {
+		t.Fatal("Peek returned nil")
+	}
+	if first.Key != "item2" {
+		t.Errorf("Expected first to be item2 after update, got %s", first.Key)
+	}
+
+	popFirst := pq.Pop()
+	if popFirst.Key != "item2" {
+		t.Errorf("Expected popped first to be item2, got %s", popFirst.Key)
+	}
+
+	popSecond := pq.Pop()
+	if popSecond.Key != "item1" {
+		t.Errorf("Expected popped second to be item1, got %s", popSecond.Key)
+	}
+}
+
+func TestUpdatablePriorityQueue_UpdateToLater(t *testing.T) {
+	pq := NewUpdatablePriorityQueue()
+
+	now := time.Now()
+	pq.Update("item1", now.Add(1*time.Second))
+	pq.Update("item2", now.Add(2*time.Second))
+
+	// Update item1 to have a later time than item2
+	pq.Update("item1", now.Add(3*time.Second))
+
+	first := pq.Pop()
+	if first == nil || first.Key != "item2" {
+		t.Errorf("Expected first to be item2, got %v", first)
+	}
+
+	second := pq.Pop()
+	if second == nil || second.Key != "item1" {
+		t.Errorf("Expected second to be item1, got %v", second)
+	}
+}
+
+func TestUpdatablePriorityQueue_Empty(t *testing.T) {
+	pq := NewUpdatablePriorityQueue()
+
+	if pq.Peek() != nil {
+		t.Error("Expected Peek on empty pq to return nil")
+	}
+	if pq.Pop() != nil {
+		t.Error("Expected Pop on empty pq to return nil")
+	}
+}