Added basic pyproject.toml and started on unit tests

tests/conftest.py

@@ -0,0 +1,5 @@
+import os
+import sys
+
+# Add the parent directory of the current file (i.e., the "tests" directory) to sys.path
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))

tests/example_data_objects.py

@@ -0,0 +1,62 @@
+from music_kraken import objects
+
+import pycountry
+
+
+song = objects.Song(
+    genre="HS Core",
+    title="Vein Deep in the Solution",
+    length=666,
+    isrc="US-S1Z-99-00001",
+    tracksort=2,
+    target=[
+        objects.Target(file="song.mp3", path="example")
+    ],
+    lyrics_list=[
+        objects.Lyrics(text="these are some depressive lyrics", language="en"),
+        objects.Lyrics(text="Dies sind depressive Lyrics", language="de")
+    ],
+    source_list=[
+        objects.Source(objects.SourcePages.YOUTUBE, "https://youtu.be/dfnsdajlhkjhsd"),
+        objects.Source(objects.SourcePages.MUSIFY, "https://ln.topdf.de/Music-Kraken/")
+    ],
+    album_list=[
+        objects.Album(
+            title="One Final Action",
+            date=objects.ID3Timestamp(year=1986, month=3, day=1),
+            language=pycountry.languages.get(alpha_2="en"),
+            label_list=[
+                objects.Label(name="an album label")
+            ],
+            source_list=[
+                    objects.Source(objects.SourcePages.ENCYCLOPAEDIA_METALLUM, "https://www.metal-archives.com/albums/I%27m_in_a_Coffin/One_Final_Action/207614")
+                ]
+        ),
+    ],
+    main_artist_list=[
+        objects.Artist(
+            name="I'm in a coffin",
+            source_list=[
+                objects.Source(
+                    objects.SourcePages.ENCYCLOPAEDIA_METALLUM,
+                    "https://www.metal-archives.com/bands/I%27m_in_a_Coffin/127727"
+                    )
+            ]
+        ),
+        objects.Artist(name="some_split_artist")
+    ],
+    feature_artist_list=[
+        objects.Artist(
+            name="Ruffiction",
+            label_list=[
+                objects.Label(name="Ruffiction Productions")
+            ]
+        )
+    ],
+)
+
+print(song.option_string)
+for album in song.album_collection:
+    print(album.option_string)
+for artist in song.main_artist_collection:
+    print(artist.option_string)