added tests, changed __main__ to cli

tests/auth.py

@@ -0,0 +1,24 @@
+import pytest
+
+from tiktok_hashtag_analysis.auth import Authorization
+
+MS_TOKEN = "thisisafakemstokenfortiktok"
+
+
+def test_auth_input(tmp_path, monkeypatch):
+    config_file = tmp_path / ".tiktok"
+    monkeypatch.setattr("builtins.input", lambda _: MS_TOKEN)
+    auth = Authorization(config_file=config_file)
+    auth.get_token()
+
+    assert auth.ms_token == MS_TOKEN
+
+
+def test_auth(tmp_path):
+    config_file = tmp_path / ".tiktok"
+    auth = Authorization(config_file=config_file)
+
+    auth.dump_token(ms_token=MS_TOKEN)
+    auth.get_token()
+
+    assert auth.ms_token == MS_TOKEN