#16559: Add more tests for the json module. Patch by Serhiy Storchaka.

1 files changed, 15 insertions, 0 deletions

diff --git a/Lib/test/json_tests/test_float.py b/Lib/test/json_tests/test_float.py
index a3441cf..38ef7e9 100644
--- a/Lib/test/json_tests/test_float.py
+++ b/Lib/test/json_tests/test_float.py
@@ -13,6 +13,21 @@ class TestFloat:
             self.assertEqual(self.dumps(num), str(num))
             self.assertEqual(int(self.dumps(num)), num)
 
+    def test_out_of_range(self):
+        self.assertEqual(self.loads('[23456789012E666]'), [float('inf')])
+        self.assertEqual(self.loads('[-23456789012E666]'), [float('-inf')])
+
+    def test_allow_nan(self):
+        for val in (float('inf'), float('-inf'), float('nan')):
+            out = self.dumps([val])
+            if val == val:  # inf
+                self.assertEqual(self.loads(out), [val])
+            else:  # nan
+                res = self.loads(out)
+                self.assertEqual(len(res), 1)
+                self.assertNotEqual(res[0], res[0])
+            self.assertRaises(ValueError, self.dumps, [val], allow_nan=False)
+
 
 class TestPyFloat(TestFloat, PyTest): pass
 class TestCFloat(TestFloat, CTest): pass