1 files changed, 370 insertions, 0 deletions
diff --git a/weed/filer/empty_folder_cleanup/cleanup_queue_test.go b/weed/filer/empty_folder_cleanup/cleanup_queue_test.go
new file mode 100644
index 000000000..eda1c3633
--- /dev/null
+++ b/weed/filer/empty_folder_cleanup/cleanup_queue_test.go
@@ -0,0 +1,370 @@
+package empty_folder_cleanup
+
+import (
+	"testing"
+	"time"
+)
+
+func TestCleanupQueue_Add(t *testing.T) {
+	q := NewCleanupQueue(100, 10*time.Minute)
+	now := time.Now()
+
+	// Add first item
+	if !q.Add("/buckets/b1/folder1", now) {
+		t.Error("expected Add to return true for new item")
+	}
+	if q.Len() != 1 {
+		t.Errorf("expected len 1, got %d", q.Len())
+	}
+
+	// Add second item with later time
+	if !q.Add("/buckets/b1/folder2", now.Add(1*time.Second)) {
+		t.Error("expected Add to return true for new item")
+	}
+	if q.Len() != 2 {
+		t.Errorf("expected len 2, got %d", q.Len())
+	}
+
+	// Add duplicate with newer time - should update and reposition
+	if q.Add("/buckets/b1/folder1", now.Add(2*time.Second)) {
+		t.Error("expected Add to return false for existing item")
+	}
+	if q.Len() != 2 {
+		t.Errorf("expected len 2 after duplicate, got %d", q.Len())
+	}
+
+	// folder1 should now be at the back (newer time) - verify by popping
+	folder1, _ := q.Pop()
+	folder2, _ := q.Pop()
+	if folder1 != "/buckets/b1/folder2" || folder2 != "/buckets/b1/folder1" {
+		t.Errorf("expected folder1 to be moved to back, got %s, %s", folder1, folder2)
+	}
+}
+
+func TestCleanupQueue_Add_OutOfOrder(t *testing.T) {
+	q := NewCleanupQueue(100, 10*time.Minute)
+	baseTime := time.Now()
+
+	// Add items out of order
+	q.Add("/buckets/b1/folder3", baseTime.Add(3*time.Second))
+	q.Add("/buckets/b1/folder1", baseTime.Add(1*time.Second))
+	q.Add("/buckets/b1/folder2", baseTime.Add(2*time.Second))
+
+	// Items should be in time order (oldest first) - verify by popping
+	expected := []string{"/buckets/b1/folder1", "/buckets/b1/folder2", "/buckets/b1/folder3"}
+	for i, exp := range expected {
+		folder, ok := q.Pop()
+		if !ok || folder != exp {
+			t.Errorf("at index %d: expected %s, got %s", i, exp, folder)
+		}
+	}
+}
+
+func TestCleanupQueue_Add_DuplicateWithOlderTime(t *testing.T) {
+	q := NewCleanupQueue(100, 10*time.Minute)
+	baseTime := time.Now()
+
+	// Add folder at t=5
+	q.Add("/buckets/b1/folder1", baseTime.Add(5*time.Second))
+
+	// Try to add same folder with older time - should NOT update
+	q.Add("/buckets/b1/folder1", baseTime.Add(2*time.Second))
+
+	// Time should remain at t=5
+	_, queueTime, _ := q.Peek()
+	if queueTime != baseTime.Add(5*time.Second) {
+		t.Errorf("expected time to remain unchanged, got %v", queueTime)
+	}
+}
+
+func TestCleanupQueue_Remove(t *testing.T) {
+	q := NewCleanupQueue(100, 10*time.Minute)
+	now := time.Now()
+
+	q.Add("/buckets/b1/folder1", now)
+	q.Add("/buckets/b1/folder2", now.Add(1*time.Second))
+	q.Add("/buckets/b1/folder3", now.Add(2*time.Second))
+
+	// Remove middle item
+	if !q.Remove("/buckets/b1/folder2") {
+		t.Error("expected Remove to return true for existing item")
+	}
+	if q.Len() != 2 {
+		t.Errorf("expected len 2, got %d", q.Len())
+	}
+	if q.Contains("/buckets/b1/folder2") {
+		t.Error("removed item should not be in queue")
+	}
+
+	// Remove non-existent item
+	if q.Remove("/buckets/b1/nonexistent") {
+		t.Error("expected Remove to return false for non-existent item")
+	}
+
+	// Verify order is preserved by popping
+	folder1, _ := q.Pop()
+	folder3, _ := q.Pop()
+	if folder1 != "/buckets/b1/folder1" || folder3 != "/buckets/b1/folder3" {
+		t.Errorf("unexpected order: %s, %s", folder1, folder3)
+	}
+}
+
+func TestCleanupQueue_Pop(t *testing.T) {
+	q := NewCleanupQueue(100, 10*time.Minute)
+	now := time.Now()
+
+	// Pop from empty queue
+	folder, ok := q.Pop()
+	if ok {
+		t.Error("expected Pop to return false for empty queue")
+	}
+	if folder != "" {
+		t.Errorf("expected empty folder, got %s", folder)
+	}
+
+	// Add items and pop in order
+	q.Add("/buckets/b1/folder1", now)
+	q.Add("/buckets/b1/folder2", now.Add(1*time.Second))
+	q.Add("/buckets/b1/folder3", now.Add(2*time.Second))
+
+	folder, ok = q.Pop()
+	if !ok || folder != "/buckets/b1/folder1" {
+		t.Errorf("expected folder1, got %s (ok=%v)", folder, ok)
+	}
+
+	folder, ok = q.Pop()
+	if !ok || folder != "/buckets/b1/folder2" {
+		t.Errorf("expected folder2, got %s (ok=%v)", folder, ok)
+	}
+
+	folder, ok = q.Pop()
+	if !ok || folder != "/buckets/b1/folder3" {
+		t.Errorf("expected folder3, got %s (ok=%v)", folder, ok)
+	}
+
+	// Queue should be empty now
+	if q.Len() != 0 {
+		t.Errorf("expected empty queue, got len %d", q.Len())
+	}
+}
+
+func TestCleanupQueue_Peek(t *testing.T) {
+	q := NewCleanupQueue(100, 10*time.Minute)
+	now := time.Now()
+
+	// Peek empty queue
+	folder, _, ok := q.Peek()
+	if ok {
+		t.Error("expected Peek to return false for empty queue")
+	}
+
+	// Add item and peek
+	q.Add("/buckets/b1/folder1", now)
+	folder, queueTime, ok := q.Peek()
+	if !ok || folder != "/buckets/b1/folder1" {
+		t.Errorf("expected folder1, got %s (ok=%v)", folder, ok)
+	}
+	if queueTime != now {
+		t.Errorf("expected queue time %v, got %v", now, queueTime)
+	}
+
+	// Peek should not remove item
+	if q.Len() != 1 {
+		t.Errorf("Peek should not remove item, len=%d", q.Len())
+	}
+}
+
+func TestCleanupQueue_Contains(t *testing.T) {
+	q := NewCleanupQueue(100, 10*time.Minute)
+	now := time.Now()
+
+	q.Add("/buckets/b1/folder1", now)
+
+	if !q.Contains("/buckets/b1/folder1") {
+		t.Error("expected Contains to return true")
+	}
+	if q.Contains("/buckets/b1/folder2") {
+		t.Error("expected Contains to return false for non-existent")
+	}
+}
+
+func TestCleanupQueue_ShouldProcess_MaxSize(t *testing.T) {
+	q := NewCleanupQueue(3, 10*time.Minute)
+	now := time.Now()
+
+	// Empty queue
+	if q.ShouldProcess() {
+		t.Error("empty queue should not need processing")
+	}
+
+	// Add items below max
+	q.Add("/buckets/b1/folder1", now)
+	q.Add("/buckets/b1/folder2", now.Add(1*time.Second))
+	if q.ShouldProcess() {
+		t.Error("queue below max should not need processing")
+	}
+
+	// Add item to reach max
+	q.Add("/buckets/b1/folder3", now.Add(2*time.Second))
+	if !q.ShouldProcess() {
+		t.Error("queue at max should need processing")
+	}
+}
+
+func TestCleanupQueue_ShouldProcess_MaxAge(t *testing.T) {
+	q := NewCleanupQueue(100, 100*time.Millisecond) // Short max age for testing
+
+	// Add item with old event time
+	oldTime := time.Now().Add(-1 * time.Second) // 1 second ago
+	q.Add("/buckets/b1/folder1", oldTime)
+
+	// Item is older than maxAge, should need processing
+	if !q.ShouldProcess() {
+		t.Error("old item should trigger processing")
+	}
+
+	// Clear and add fresh item
+	q.Clear()
+	q.Add("/buckets/b1/folder2", time.Now())
+
+	// Fresh item should not trigger processing
+	if q.ShouldProcess() {
+		t.Error("fresh item should not trigger processing")
+	}
+}
+
+func TestCleanupQueue_Clear(t *testing.T) {
+	q := NewCleanupQueue(100, 10*time.Minute)
+	now := time.Now()
+
+	q.Add("/buckets/b1/folder1", now)
+	q.Add("/buckets/b1/folder2", now.Add(1*time.Second))
+	q.Add("/buckets/b1/folder3", now.Add(2*time.Second))
+
+	q.Clear()
+
+	if q.Len() != 0 {
+		t.Errorf("expected empty queue after Clear, got len %d", q.Len())
+	}
+	if q.Contains("/buckets/b1/folder1") {
+		t.Error("queue should not contain items after Clear")
+	}
+}
+
+func TestCleanupQueue_OldestAge(t *testing.T) {
+	q := NewCleanupQueue(100, 10*time.Minute)
+
+	// Empty queue
+	if q.OldestAge() != 0 {
+		t.Error("empty queue should have zero oldest age")
+	}
+
+	// Add item with time in the past
+	oldTime := time.Now().Add(-5 * time.Minute)
+	q.Add("/buckets/b1/folder1", oldTime)
+
+	// Age should be approximately 5 minutes
+	age := q.OldestAge()
+	if age < 4*time.Minute || age > 6*time.Minute {
+		t.Errorf("expected ~5m age, got %v", age)
+	}
+}
+
+func TestCleanupQueue_TimeOrder(t *testing.T) {
+	q := NewCleanupQueue(100, 10*time.Minute)
+	baseTime := time.Now()
+
+	// Add items in order
+	items := []string{
+		"/buckets/b1/a",
+		"/buckets/b1/b",
+		"/buckets/b1/c",
+		"/buckets/b1/d",
+		"/buckets/b1/e",
+	}
+	for i, item := range items {
+		q.Add(item, baseTime.Add(time.Duration(i)*time.Second))
+	}
+
+	// Pop should return in time order
+	for i, expected := range items {
+		got, ok := q.Pop()
+		if !ok {
+			t.Errorf("Pop %d: expected item, got empty", i)
+		}
+		if got != expected {
+			t.Errorf("Pop %d: expected %s, got %s", i, expected, got)
+		}
+	}
+}
+
+func TestCleanupQueue_DuplicateWithNewerTime(t *testing.T) {
+	q := NewCleanupQueue(100, 10*time.Minute)
+	baseTime := time.Now()
+
+	// Add items
+	q.Add("/buckets/b1/folder1", baseTime)
+	q.Add("/buckets/b1/folder2", baseTime.Add(1*time.Second))
+	q.Add("/buckets/b1/folder3", baseTime.Add(2*time.Second))
+
+	// Add duplicate with newer time - should update and reposition
+	q.Add("/buckets/b1/folder1", baseTime.Add(3*time.Second))
+
+	// folder1 should now be at the back (newest time) - verify by popping
+	expected := []string{"/buckets/b1/folder2", "/buckets/b1/folder3", "/buckets/b1/folder1"}
+	for i, exp := range expected {
+		folder, ok := q.Pop()
+		if !ok || folder != exp {
+			t.Errorf("at index %d: expected %s, got %s", i, exp, folder)
+		}
+	}
+}
+
+func TestCleanupQueue_Concurrent(t *testing.T) {
+	q := NewCleanupQueue(1000, 10*time.Minute)
+	done := make(chan bool)
+	now := time.Now()
+
+	// Concurrent adds
+	go func() {
+		for i := 0; i < 100; i++ {
+			q.Add("/buckets/b1/folder"+string(rune('A'+i%26)), now.Add(time.Duration(i)*time.Millisecond))
+		}
+		done <- true
+	}()
+
+	// Concurrent removes
+	go func() {
+		for i := 0; i < 50; i++ {
+			q.Remove("/buckets/b1/folder" + string(rune('A'+i%26)))
+		}
+		done <- true
+	}()
+
+	// Concurrent pops
+	go func() {
+		for i := 0; i < 30; i++ {
+			q.Pop()
+		}
+		done <- true
+	}()
+
+	// Concurrent reads
+	go func() {
+		for i := 0; i < 100; i++ {
+			q.Len()
+			q.Contains("/buckets/b1/folderA")
+			q.ShouldProcess()
+		}
+		done <- true
+	}()
+
+	// Wait for all goroutines
+	for i := 0; i < 4; i++ {
+		<-done
+	}
+
+	// Just verify no panic occurred and queue is in consistent state
+	_ = q.Len()
+}
+