refactor: split modules and harden scraping workflows

internal/service/scanner_local_probe_queue_test.go

@@ -0,0 +1,64 @@
+package service
+
+import (
+	"testing"
+	"time"
+
+	"go.uber.org/zap"
+)
+
+func newLocalProbeQueueTestScanner(capacity int) *ScannerService {
+	return &ScannerService{
+		log:                  zap.NewNop(),
+		probe:                &FFprobeService{},
+		localMediaProbeQueue: make(chan localMediaProbeTask, capacity),
+		localMediaProbing:    make(map[string]struct{}),
+	}
+}
+
+func TestNewLocalMediaProbeTaskTrimsAndRejectsInvalidInput(t *testing.T) {
+	scanner := newLocalProbeQueueTestScanner(1)
+	task, ok := scanner.newLocalMediaProbeTask(" C:/media/movie.mkv ")
+	if !ok || task.path != "C:/media/movie.mkv" {
+		t.Fatalf("task = %#v ok=%v, want trimmed valid task", task, ok)
+	}
+	if _, ok := scanner.newLocalMediaProbeTask(" \t "); ok {
+		t.Fatal("blank path should be rejected")
+	}
+	scanner.probe = nil
+	if _, ok := scanner.newLocalMediaProbeTask("C:/media/movie.mkv"); ok {
+		t.Fatal("scanner without probe should reject local probe task")
+	}
+}
+
+func TestReserveLocalMediaProbeRejectsDuplicateAndReleaseAllowsRetry(t *testing.T) {
+	scanner := newLocalProbeQueueTestScanner(1)
+	if !scanner.reserveLocalMediaProbe("C:/media/movie.mkv") {
+		t.Fatal("first reserve should succeed")
+	}
+	if scanner.reserveLocalMediaProbe("C:/media/movie.mkv") {
+		t.Fatal("duplicate reserve should fail")
+	}
+	scanner.releaseLocalMediaProbe("C:/media/movie.mkv")
+	if !scanner.reserveLocalMediaProbe("C:/media/movie.mkv") {
+		t.Fatal("reserve should succeed after release")
+	}
+}
+
+func TestEnqueueLocalMediaProbeReportsFullQueue(t *testing.T) {
+	scanner := newLocalProbeQueueTestScanner(1)
+	if !scanner.enqueueLocalMediaProbe(localMediaProbeTask{path: "C:/media/a.mkv"}) {
+		t.Fatal("first enqueue should fit buffer")
+	}
+	if scanner.enqueueLocalMediaProbe(localMediaProbeTask{path: "C:/media/b.mkv"}) {
+		t.Fatal("second enqueue should report full queue")
+	}
+	select {
+	case task := <-scanner.localMediaProbeQueue:
+		if task.path != "C:/media/a.mkv" {
+			t.Fatalf("queued task = %#v, want first path", task)
+		}
+	case <-time.After(time.Second):
+		t.Fatal("expected queued task")
+	}
+}