refactor: split modules and harden scraping workflows

internal/service/scanner_probe_queue_test.go

@@ -0,0 +1,69 @@
+package service
+
+import (
+	"testing"
+	"time"
+
+	"go.uber.org/zap"
+)
+
+func newProbeQueueTestScanner(capacity int) *ScannerService {
+	return &ScannerService{
+		log:                    zap.NewNop(),
+		storage:                &StorageConfigService{},
+		probe:                  &FFprobeService{},
+		cloudMediaProbeQueue:   make(chan cloudMediaProbeTask, capacity),
+		cloudMediaProbing:      make(map[string]struct{}),
+		cloudMediaProbeBackoff: make(map[string]time.Time),
+	}
+}
+
+func TestQueueCloudMediaProbeTrimsTaskAndRejectsDuplicate(t *testing.T) {
+	scanner := newProbeQueueTestScanner(1)
+	if !scanner.queueCloudMediaProbe(" openlist ", " /Movies/a.mkv ", " cloud://openlist/Movies/a.mkv ") {
+		t.Fatal("first cloud probe should enqueue")
+	}
+	if scanner.queueCloudMediaProbe("openlist", "/Movies/a.mkv", "cloud://openlist/Movies/a.mkv") {
+		t.Fatal("duplicate cloud probe should be rejected while in flight")
+	}
+
+	task := <-scanner.cloudMediaProbeQueue
+	if task.typ != "openlist" || task.ref != "/Movies/a.mkv" || task.path != "cloud://openlist/Movies/a.mkv" {
+		t.Fatalf("task was not normalized: %#v", task)
+	}
+}
+
+func TestQueueCloudMediaProbeFullQueueBacksOffAndReleases(t *testing.T) {
+	scanner := newProbeQueueTestScanner(0)
+	if scanner.queueCloudMediaProbe("openlist", "/Movies/a.mkv", "cloud://openlist/Movies/a.mkv") {
+		t.Fatal("unbuffered queue without receiver should reject enqueue")
+	}
+
+	scanner.cloudMediaProbeMu.Lock()
+	_, probing := scanner.cloudMediaProbing["cloud://openlist/Movies/a.mkv"]
+	until, backedOff := scanner.cloudMediaProbeBackoff["cloud://openlist/Movies/a.mkv"]
+	scanner.cloudMediaProbeMu.Unlock()
+	if probing {
+		t.Fatal("queue-full path should release in-flight marker")
+	}
+	if !backedOff || !until.After(time.Now()) {
+		t.Fatalf("queue-full path should receive future backoff, got %v", until)
+	}
+	if scanner.queueCloudMediaProbe("openlist", "/Movies/a.mkv", "cloud://openlist/Movies/a.mkv") {
+		t.Fatal("backed-off path should not be retried immediately")
+	}
+}
+
+func TestQueueCloudMediaProbeBudgetConsumesAttempts(t *testing.T) {
+	scanner := newProbeQueueTestScanner(0)
+	budget := 1
+	if scanner.queueCloudMediaProbeWithBudget("openlist", "/Movies/a.mkv", "cloud://openlist/Movies/a.mkv", &budget) {
+		t.Fatal("unbuffered queue without receiver should reject enqueue")
+	}
+	if budget != 0 {
+		t.Fatalf("budget = %d, want 0 after attempted enqueue", budget)
+	}
+	if scanner.queueCloudMediaProbeWithBudget("openlist", "/Movies/b.mkv", "cloud://openlist/Movies/b.mkv", &budget) {
+		t.Fatal("zero budget should prevent enqueue")
+	}
+}