▶ Improved tests, added important notices ◀

id3v10.go

@@ -91,6 +91,8 @@ func GetID3v1Tags(rs io.ReadSeeker) (*ID3v1Tags, error) {
 }
 
 // Writes given ID3v1.0 tags to given io.WriteSeeker.
+// NOTE: will not remove already existing ID3v1 tag if it`s present,
+// use ⁕WriteToFile⁕ method if you`re working with REAL mp3 files !!!
 func (tags *ID3v1Tags) Write(dst io.WriteSeeker) error {
 	dst.Seek(0, io.SeekEnd)
 

id3v10_test.go

@@ -15,7 +15,7 @@ var TESTv1TAGS = &ID3v1Tags{
 }
 
 func TestGetID3v1Tags(t *testing.T) {
-	testfile, err := os.Open("./testData/testreadv1.mp3")
+	testfile, err := os.OpenFile("./testData/testreadv1.mp3", os.O_CREATE|os.O_RDONLY, os.ModePerm)
 	if err != nil {
 		t.Errorf("could not open file for testing: %s", err)
 	}
@@ -30,9 +30,7 @@ func TestGetID3v1Tags(t *testing.T) {
 }
 
 func TestWriteID3v1Tags(t *testing.T) {
-	os.Remove("./testData/testwritev1.mp3")
-
-	f, err := os.Create("./testData/testwritev1.mp3")
+	f, err := os.OpenFile("./testData/testwritev1.mp3", os.O_CREATE|os.O_RDWR, os.ModePerm)
 	if err != nil {
 		t.Errorf("%s", err)
 	}
@@ -40,11 +38,13 @@ func TestWriteID3v1Tags(t *testing.T) {
 
 	tags := TESTv1TAGS
 
+	// writing tags
 	err = tags.Write(f)
 	if err != nil {
 		t.Errorf("WriteID3v1Tags failed: %s", err)
 	}
 
+	// reading tags
 	readTags, err := GetID3v1Tags(f)
 	if err != nil {
 		t.Errorf("%s", err)
@@ -60,7 +60,7 @@ func TestWriteID3v1Tags(t *testing.T) {
 }
 
 func TestWriteID3v1ToFile(t *testing.T) {
-	f, err := os.Open("./testData/testwritev1.mp3")
+	f, err := os.OpenFile("./testData/testwritev1.mp3", os.O_CREATE|os.O_RDWR, os.ModePerm)
 	if err != nil {
 		t.Errorf("%s", err)
 	}

id3v11.go

@@ -107,6 +107,8 @@ func GetID3v11Tags(rs io.ReadSeeker) (*ID3v11Tags, error) {
 }
 
 // Writes given ID3v1.1 tags to dst
+// NOTE: will not remove already existing ID3v1.1 tag if it`s present,
+// use ⁕WriteToFile⁕ method if you`re working with REAL mp3 files !!!
 func (tags *ID3v11Tags) Write(dst io.WriteSeeker) error {
 	dst.Seek(0, io.SeekEnd)
 

id3v11_test.go

@@ -36,10 +36,9 @@ func TestGetID3v11Tags(t *testing.T) {
 	}
 }
 
+// WILL ADD NEW "TAG" WITHOUT REMOVING THE OLD ONE !!!
 func TestWriteID3v11Tags(t *testing.T) {
-	os.Remove("./testData/testwritev1.mp3")
-
-	f, err := os.Create("./testData/testwritev1.mp3")
+	f, err := os.OpenFile("./testData/testwritev1.mp3", os.O_CREATE|os.O_RDWR, os.ModePerm)
 	if err != nil {
 		t.Errorf("%s", err)
 	}
@@ -71,7 +70,7 @@ func TestWriteID3v11Tags(t *testing.T) {
 }
 
 func TestWriteID3v11ToFile(t *testing.T) {
-	f, err := os.Open("./testData/testwritev1.mp3")
+	f, err := os.OpenFile("./testData/testwritev1.mp3", os.O_CREATE|os.O_RDWR, os.ModePerm)
 	if err != nil {
 		t.Errorf("%s", err)
 	}