Test round-trip on float.as_integer_ratio() and float.__truediv__().

diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index 2f2634d054f38baa905061fac7ff3d9eb4006fe6..cfc900335d9b11a4fcaec691db4cb975d43b2b8d 100644 (file)
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -697,6 +697,12 @@ class BuiltinTest(unittest.TestCase):
             ]:
             self.assertEqual(f.as_integer_ratio(), ratio)
 
+        for i in range(10000):
+            f = random.random()
+            f *= 10 ** random.randint(-100, 100)
+            n, d = f.as_integer_ratio()
+            self.assertEqual(float(n).__truediv__(d), f)
+
         R = rational.Rational
         self.assertEqual(R(0, 1),
                          R(*float(0.0).as_integer_ratio()))