hooting
diff --git a/‎algorithms/math/__init__.py‎ b/‎algorithms/math/__init__.py‎
diff --git a/‎algorithms/tests/test_math.py‎
Lines changed: 25 additions & 0 deletions b/‎algorithms/tests/test_math.py‎
Lines changed: 25 additions & 0 deletions
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+import unittest
+from ..math.extended_gcd import extended_gcd
+
+class TestExtendedGCD(unittest.TestCase):
+
+	def test_extended_gcd(self):
+		# Find extended_gcd of 35 and 77
+		(a,b) = extended_gcd(35, 77)
+		self.assertIs(35*a + 77*b, 7)
+
+		# Find extended_gcd of 15 and 19
+		(a,b) = extended_gcd(15, 19)
+		self.assertIs(15*a + 19*b, 1)
+
+		# Find extended_gcd of 18 and 9
+		(a,b) = extended_gcd(18, 9)
+		self.assertIs(18*a + 9*b, 9)
+
+		# Find extended_gcd of 99 and 81
+		(a,b) = extended_gcd(99, 81)
+		self.assertIs(99*a + 81*b, 9)
+
+		# Find extended_gcd of 50 and 15
+		(a,b) = extended_gcd(50, 15)
+		self.assertIs(50*a + 15*b, 5)