*исправления по считыванию данных без BOM

*добавлены работающие тесты

test/id3v1_test.v

@@ -0,0 +1,29 @@
+import os
+import metadata
+
+// Проверка чтения id3v1
+fn test_idv3v1() {
+	mut audio := os.open("./data/test_id3v1.mp3") or { panic(err) }
+	defer {
+		audio.close()
+	}
+	mut wav := metadata.Audio{}
+	wav.detect_tags(mut audio)
+
+	assert wav.id3v1.embedded == true, 'Тег показан false, а должен быть true'
+	assert wav.id3v23.embedded == false, 'Тег показан true, а должен быть false'
+	assert wav.id3v24.embedded == false, 'Тег показан true, а должен быть false'
+
+	last_bytes := metadata.get_bytes(mut audio, -128, 128)
+	wav.id3v1.get_metadata(last_bytes)
+
+	assert wav.id3v1.genre == "Rock"
+	assert wav.id3v1.title == "Test Title"
+	assert wav.id3v1.artist == "Test Artist"
+	assert wav.id3v1.album == "Test Album"
+	assert wav.id3v1.track == "6"
+	assert wav.id3v1.year == "2026"
+	assert wav.id3v1.comment == "Test comment"
+	assert wav.id3v1.embedded == true
+}
+

test/id3v2_test.v

@@ -0,0 +1,75 @@
+import os
+import metadata
+
+// Проверка чтения id3v23
+fn test_idv3v23() {
+	mut audio := os.open("./data/test_id3v23.mp3") or { panic(err) }
+	defer {
+		audio.close()
+	}
+	mut wav := metadata.Audio{}
+	wav.detect_tags(mut audio)
+
+	assert wav.id3v1.embedded == false, 'Тег показан false, а должен быть true'
+	assert wav.id3v23.embedded == true, 'Тег показан true, а должен быть false'
+	assert wav.id3v24.embedded == false, 'Тег показан true, а должен быть false'
+	wav.id3v23.get_full_size(mut audio)
+	wav.id3v23.fill_tags(mut audio)
+
+	assert wav.id3v23.tit2.data == "Test Title"
+	assert wav.id3v23.tpe1.data == "Test Author"
+	assert wav.id3v23.tpe2.data == "Test Narator"
+	assert wav.id3v23.talb.data == "Test Album"
+	assert wav.id3v23.tyer.data == "2026"
+	assert wav.id3v23.trck.data == "6/7"
+	assert wav.id3v23.tcon.data == "Rock"
+	assert wav.id3v23.tcop.data == "Test"
+	assert wav.id3v23.txxx.data == "comment"
+
+	id3v1 := wav.id3v23.to_v1()
+
+	assert id3v1.genre == "Rock"
+	assert id3v1.title == "Test Title"
+	assert id3v1.artist == "Test Narator"
+	assert id3v1.album == "Test Album"
+	assert id3v1.track == "6"
+	assert id3v1.year == "2026"
+	assert id3v1.comment == "comment"
+}
+
+// Проверка чтения id3v24
+fn test_idv3v24() {
+	mut audio := os.open("./data/test_id3v24.mp3") or { panic(err) }
+	defer {
+		audio.close()
+	}
+	mut wav := metadata.Audio{}
+	wav.detect_tags(mut audio)
+
+	assert wav.id3v1.embedded == false, 'Тег показан false, а должен быть true'
+	assert wav.id3v23.embedded == false, 'Тег показан true, а должен быть false'
+	assert wav.id3v24.embedded == true, 'Тег показан true, а должен быть false'
+	wav.id3v24.get_full_size(mut audio)
+	wav.id3v24.fill_tags(mut audio)
+
+	assert wav.id3v24.tit2.data == "Test Title"
+	assert wav.id3v24.tpe1.data == "Test Author"
+	assert wav.id3v24.tpe2.data == "Test Narator"
+	assert wav.id3v24.talb.data == "Test Album"
+	assert wav.id3v24.tdrc.data == "2026"
+	assert wav.id3v24.trck.data == "6/7"
+	assert wav.id3v24.tcon.data == "Rock"
+	assert wav.id3v24.tcop.data == "Test"
+	assert wav.id3v24.txxx.data == "comment"
+
+	id3v1 := wav.id3v24.to_v1()
+
+	assert id3v1.genre == "Rock"
+	assert id3v1.title == "Test Title"
+	assert id3v1.artist == "Test Narator"
+	assert id3v1.album == "Test Album"
+	assert id3v1.track == "6"
+	assert id3v1.year == "2026"
+	assert id3v1.comment == "comment"
+}
+