Bound remote control object reads

internal/adapters/storage/fake.go

@@ -22,6 +22,7 @@ type FakeBackend struct {
 	Objects   map[string]FakeObject
 	Uploads   []FakeUploadCall
 	Downloads []FakeDownloadCall
+	Reads     []FakeReadCall
 
 	ListErr      error
 	DownloadErr  error
@@ -45,6 +46,11 @@ type FakeDownloadCall struct {
 	Bytes     int64
 }
 
+// FakeReadCall captures one opened object in call order.
+type FakeReadCall struct {
+	Key string
+}
+
 // FakeObject is a deterministic fake object-store record.
 type FakeObject struct {
 	Key          string
@@ -127,6 +133,9 @@ func (f *FakeBackend) Read(ctx context.Context, key string) (ObjectInfo, io.Read
 	if !ok {
 		return ObjectInfo{}, nil, fmt.Errorf("read object %q: %w", normalizedKey, os.ErrNotExist)
 	}
+	f.mu.Lock()
+	f.Reads = append(f.Reads, FakeReadCall{Key: normalizedKey})
+	f.mu.Unlock()
 	return ObjectInfo{Key: obj.Key, Size: int64(len(obj.Data)), ETag: obj.ETag, LastModified: obj.LastModified}, io.NopCloser(bytes.NewReader(obj.Data)), nil
 }