Add simple tests

Author: mental32

Makefile

@@ -18,7 +18,7 @@ doc:
 	cd docs && make html
 
 test:
-	$(PYTHON) -m unittest discover -s test
+	$(PYTHON) -m unittest discover -s tests
 
 format:
 	$(FORMATTER) spotify

tests/test_import.py

@@ -0,0 +1,23 @@
+import sys
+import importlib
+import unittest
+from types import ModuleType
+
+
+class TestImporting(unittest.TestCase):
+    def _import(self, name: str) -> ModuleType:
+        module = importlib.import_module(name)
+
+        try:
+            sys.modules.pop(name)
+        finally:
+            del module
+
+    def test_import(self):
+        self._import('spotify')
+
+    def test_import_sync(self):
+        self._import('spotify.sync')
+
+if __name__ == '__main__':
+    unittest.main()