Add username and list test

test/test_username.py

@@ -0,0 +1,42 @@
+# -*- coding: UTF-8 -*-
+
+import spotdl
+
+username = 'alex'
+
+def test_user():
+    expect_playlists = 7
+    playlists = spotdl.spotify.user_playlists(username)
+    playlists = len(playlists['items'])
+    assert playlists == expect_playlists
+
+def test_playlist():
+    expect_tracks = 14
+    playlist = spotdl.spotify.user_playlists(username)['items'][0]
+    tracks = playlist['tracks']['total']
+    assert tracks == expect_tracks
+
+def test_list():
+    playlist = spotdl.spotify.user_playlists(username)['items'][0]
+    expect_lines = playlist['tracks']['total']
+    result = spotdl.spotify.user_playlist(playlist['owner']['id'], playlist['id'], fields='tracks,next')
+    tracks = result['tracks']
+    spotdl.misc.feed_tracks('list.txt', tracks)
+
+    while tracks['next']:
+        tracks = spotify.next(tracks)
+        misc.feed_tracks('list.txt', tracks)
+
+    with open('list.txt', 'r') as listed:
+        expect_song = (listed.read()).splitlines()[0]
+
+    spotdl.misc.trim_song('list.txt')
+    with open('list.txt', 'a') as myfile:
+        myfile.write(expect_song)
+
+    with open('list.txt', 'r') as listed:
+        songs = (listed.read()).splitlines()
+
+    lines = len(songs)
+    song = songs[-1]
+    assert (expect_lines == lines and expect_song == song)