bring is_integer into tested existence

diff --git a/Lib/test/test_float.py b/Lib/test/test_float.py
index eb119ce6f0c19558115c8a5a227ff3fa7d474757..42463713cdc416e9c6960d327ec264ba8684f4d7 100644 (file)
--- a/Lib/test/test_float.py
+++ b/Lib/test/test_float.py
@@ -164,6 +164,12 @@ class GeneralFloatCases(unittest.TestCase):
         self.assertAlmostEqual(float(FooUnicode('8')), 9.)
         self.assertAlmostEqual(float(FooStr('8')), 9.)
 
+    def test_is_integer(self):
+        self.assertFalse((1.1).is_integer())
+        self.assertTrue((1.).is_integer())
+        self.assertFalse(float("nan").is_integer())
+        self.assertFalse(float("inf").is_integer())
+
     def test_floatasratio(self):
         for f, ratio in [
                 (0.875, (7, 8)),