adds a buffered queue

weed/util/buffered_queue_test.go

@@ -0,0 +1,78 @@
+package util
+
+import "testing"
+
+func TestJobQueue(t *testing.T) {
+	type Job[T any] struct {
+		ID     int
+		Action string
+		Data   T
+	}
+
+	queue := NewBufferedQueue[Job[string]](2) // Chunk size of 5
+	queue.Enqueue(Job[string]{ID: 1, Action: "task1", Data: "hello"})
+	queue.Enqueue(Job[string]{ID: 2, Action: "task2", Data: "world"})
+
+	if queue.Size() != 2 {
+		t.Errorf("Expected queue size of 2, got %d", queue.Size())
+	}
+
+	queue.Enqueue(Job[string]{ID: 3, Action: "task3", Data: "3!"})
+	queue.Enqueue(Job[string]{ID: 4, Action: "task4", Data: "4!"})
+	queue.Enqueue(Job[string]{ID: 5, Action: "task5", Data: "5!"})
+
+	if queue.Size() != 5 {
+		t.Errorf("Expected queue size of 5, got %d", queue.Size())
+	}
+
+	println("enqueued 5 items")
+
+	println("dequeue", 1)
+	job, ok := queue.Dequeue()
+	if !ok {
+		t.Errorf("Expected dequeue to return true")
+	}
+	if job.ID != 1 {
+		t.Errorf("Expected job ID of 1, got %d", job.ID)
+	}
+
+	println("dequeue", 2)
+	job, ok = queue.Dequeue()
+	if !ok {
+		t.Errorf("Expected dequeue to return true")
+	}
+
+	println("enqueue", 6)
+	queue.Enqueue(Job[string]{ID: 6, Action: "task6", Data: "6!"})
+	println("enqueue", 7)
+	queue.Enqueue(Job[string]{ID: 7, Action: "task7", Data: "7!"})
+
+	for i := 0; i < 5; i++ {
+		println("dequeue ...")
+		job, ok = queue.Dequeue()
+		if !ok {
+			t.Errorf("Expected dequeue to return true")
+		}
+		println("dequeued", job.ID)
+	}
+
+	if queue.Size() != 0 {
+		t.Errorf("Expected queue size of 0, got %d", queue.Size())
+	}
+
+	for i := 0; i < 5; i++ {
+		println("enqueue", i+8)
+		queue.Enqueue(Job[string]{ID: i+8, Action: "task", Data: "data"})
+	}
+	for i := 0; i < 5; i++ {
+		job, ok = queue.Dequeue()
+		if !ok {
+			t.Errorf("Expected dequeue to return true")
+		}
+		if job.ID != i+8 {
+			t.Errorf("Expected job ID of %d, got %d", i, job.ID)
+		}
+		println("dequeued", job.ID)
+	}
+
+}