Merge pull request #760 from lucaferocino/master

Add tests to take relativedelta.py to 100% coverage

AUTHORS.md

@@ -56,7 +56,7 @@ switch, and thus all their contributions are dual-licensed.
 - Kubilay Kocak <koobs@MASKED>
 - Laszlo Kiss Kollar <kiss.kollar.laszlo@MASKED> (gh: @lkollar) **D**
 - Lauren Oldja <oldja@MASKED> (gh: @loldja)
-- Luca Ferocino <luca.ferox@MASKED> (gh: @lucaferocino)
+- Luca Ferocino <luca.ferox@MASKED> (gh: @lucaferocino) **D**
 - Mario Corchero <mcorcherojim@MASKED> (gh: @mariocj89) **R**
 - Mateusz Dziedzic (gh: @m-dz) **D**
 - Matthew Schinckel <matt@MASKED>

changelog.d/760.misc.rst

@@ -0,0 +1 @@
+Added tests to bring relativedelta.py to 100% test coverage. Contribution by @lucaferocino (gh issue #521, gh pr #760).

dateutil/test/test_relativedelta.py

@@ -125,6 +125,14 @@ def testNextWenesdayNotToday(self):
         self.assertEqual(self.today+relativedelta(days=+1, weekday=WE),
                          date(2003, 9, 24))
 
+    def testAddMoreThan12Months(self):
+        self.assertEqual(date(2003, 12, 1) + relativedelta(months=+13),
+                         date(2005, 1, 1))
+
+    def testAddNegativeMonths(self):
+        self.assertEqual(date(2003, 1, 1) + relativedelta(months=-2),
+                         date(2002, 11, 1))
+
     def test15thISOYearWeek(self):
         self.assertEqual(date(2003, 1, 1) +
                          relativedelta(day=4, weeks=+14, weekday=MO(-1)),
@@ -350,6 +358,16 @@ def testRelativeDeltaFractionalMonth(self):
         with self.assertRaises(ValueError):
             relativedelta(months=1.5)
 
+    def testRelativeDeltaInvalidDatetimeObject(self):
+        with self.assertRaises(TypeError):
+            relativedelta(dt1='2018-01-01', dt2='2018-01-02')
+
+        with self.assertRaises(TypeError):
+            relativedelta(dt1=datetime(2018, 1, 1), dt2='2018-01-02')
+
+        with self.assertRaises(TypeError):
+            relativedelta(dt1='2018-01-01', dt2=datetime(2018, 1, 2))
+
     def testRelativeDeltaFractionalAbsolutes(self):
         # Fractional absolute values will soon be unsupported,
         # check for the deprecation warning.