1 files changed, 53 insertions, 0 deletions
diff --git a/python/tests/test_dates.py b/python/tests/test_dates.py
new file mode 100644
index 00000000..860d9426
--- /dev/null
+++ b/python/tests/test_dates.py
@@ -0,0 +1,53 @@
+import unittest
+import datetime
+import pandas as pd
+
+import sys
+sys.path.append('..')
+from analytics.utils import *
+
+class TestStartDate(unittest.TestCase):
+
+    def test_previous_twentieth(self):
+        self.assertEqual(previous_twentieth(datetime.date(2016, 9, 20)),
+                         datetime.date(2016, 9, 20))
+        self.assertEqual(previous_twentieth(datetime.date(2016, 10, 15)),
+                         datetime.date(2016, 9, 20))
+        self.assertEqual(previous_twentieth(datetime.date(2016, 12, 20)),
+                         datetime.date(2016, 12, 20))
+        self.assertEqual(previous_twentieth(datetime.date(2017, 3, 19)),
+                         datetime.date(2016, 12, 20))
+
+    def test_previous_twentieth_timestamp(self):
+        self.assertEqual(previous_twentieth(pd.Timestamp('2016-09-20')),
+                         pd.Timestamp('2016-09-20'))
+        self.assertEqual(previous_twentieth(pd.Timestamp('2016-10-15')),
+                         pd.Timestamp('2016-09-20'))
+        self.assertEqual(previous_twentieth(pd.Timestamp('2016-12-20')),
+                         pd.Timestamp('2016-12-20'))
+        self.assertEqual(previous_twentieth(pd.Timestamp('2017-03-19')),
+                         pd.Timestamp('2016-12-20'))
+
+class TestEndDate(unittest.TestCase):
+    def test_enddate(self):
+        self.assertEqual(roll_date(datetime.date(2016, 9, 20), 5),
+                         datetime.date(2021, 12, 20))
+        self.assertEqual(roll_date(datetime.date(2016, 10, 15), 5),
+                         datetime.date(2021, 12, 20))
+        self.assertEqual(roll_date(datetime.date(2017, 3, 19), 5),
+                         datetime.date(2021, 12, 20))
+        self.assertEqual(roll_date(datetime.date(2017, 3, 20), 5),
+                         datetime.date(2022, 6, 20))
+
+    def test_enddate_pre2015(self):
+        self.assertEqual(roll_date(datetime.date(2014, 9, 20), 5),
+                         datetime.date(2019, 12, 20))
+        self.assertEqual(roll_date(datetime.date(2014, 10, 15), 5),
+                         datetime.date(2019, 12, 20))
+        self.assertEqual(roll_date(datetime.date(2015, 3, 19), 5),
+                         datetime.date(2020, 3, 20))
+        self.assertEqual(roll_date(datetime.date(2015, 3, 20), 5),
+                         datetime.date(2020, 6, 20))
+
+if __name__=="__main__":
+    unittest.main()