Added test

tests/tests.rs

@@ -150,6 +150,42 @@ mod song_tests {
             }
         }
     }
+
+    #[test]
+    fn test_save_song_to_filesystem() {
+        let mut song = song::Song::default();
+        song.directory = utils::get_tests_directory();
+        song.filename = String::from("track02.flac");
+
+        match song.song_path() {
+            Ok(song_path) => {
+                match utils::extract_data_from_file(&song_path) {
+                    Ok(data) => {
+                        let copied_song = song::Song {
+                            directory: utils::get_tests_directory(),
+                            filename: String::from("track02-coppied.flac"),
+                            data: data,
+                            ..Default::default()
+                        };
+
+                        match copied_song.save_to_filesystem() {
+                            Ok(_) => {
+                            }
+                            Err(err) => {
+                                assert!(false, "Error: {err:?}")
+                            }
+                        }
+                    }
+                    Err(err) => {
+                        assert!(false, "Error: {err:?}")
+                    }
+                }
+            }
+            Err(err) => {
+                assert!(false, "Error: {err:?}");
+            }
+        }
+    }
 }
 
 #[cfg(test)]