feat: unit tests added

tests/test_date_converter.py

@@ -0,0 +1,26 @@
+import sys
+import unittest
+from os.path import dirname, join, abspath
+
+sys.path.insert(0, abspath(join(dirname(__file__), '..')))
+
+from nepali_date_utils.date_converter import converter
+
+class TestDateConverter(unittest.TestCase):
+
+    # Test data sets
+    test_data = [
+        {"bs_date": "2054/04/1", "ad_date": "1997/07/16"},
+        {"bs_date": "2055/09/15", "ad_date": "1998/12/30"},
+        {"bs_date": "2077/04/20", "ad_date": "2020/08/04"},
+    ]
+
+    def test_bs_to_ad(self):
+        for data in self.test_data:
+            bs_date = data["bs_date"]
+            expected_ad_date = data["ad_date"]
+            actual_ad_date = converter.bs_to_ad(bs_date)
+            self.assertEqual(actual_ad_date, expected_ad_date)
+
+if __name__ == '__main__':
+    unittest.main()