added test file

solutions/tests/test_leap_year.py

@@ -0,0 +1,48 @@
+import unittest
+for leap_year import leap_year
+
+class TestLeapYear(unittest.TestCase):
+    """
+    Test cases for the leap_year function
+    """
+
+    def test_divisibility_by_4(self):
+        """
+        Tests a year is divisible by 4 but not 100
+        """
+        self. assertTrue(leap_year(2024))
+
+    def test_not_leap_divisible_by_100(self):
+        """
+        Tests a year divisible by 100 but not 400
+        """
+        self.assertFalse(leap_year(1900))
+
+    def test_leap_divisible_by_400(self):
+        """
+        Tests a year divisible by 400 
+        """
+        self.assertTrue(leap_year(2000))
+
+    def test_not_leap_not_divisble_by_4(self):
+        """
+        Tests a year not divisble by 4
+        """
+        self.assertFalse(2023)
+
+    def test_invalid_type(self):
+        """
+        A ValueError should be raised if type is not integer
+        """
+        with self.assertRaises(ValueError):
+            leap_year("hi")
+
+    def test_invalid_negative(self):
+        """
+        A value error must be rasied if the year is a negative integer
+        """
+        with self.assertRaises(ValueError):
+            leap_year(-175)
+
+if __name__=="__main__":
+    unittest.main()