1 files changed, 22 insertions, 0 deletions
diff --git a/Lib/test/test_json/test_tool.py b/Lib/test/test_json/test_tool.py
index 953a569..54800ae 100644
--- a/Lib/test/test_json/test_tool.py
+++ b/Lib/test/test_json/test_tool.py
@@ -190,3 +190,25 @@ class TestTool(unittest.TestCase):
             json_stdout, err = proc.communicate(json_stdin)
         self.assertEqual(expect.splitlines(), json_stdout.splitlines())
         self.assertEqual(err, b'')
+
+    def test_no_ensure_ascii_flag(self):
+        infile = self._create_infile('{"key":"💩"}')
+        outfile = support.TESTFN + '.out'
+        self.addCleanup(os.remove, outfile)
+        assert_python_ok('-m', 'json.tool', '--no-ensure-ascii', infile, outfile)
+        with open(outfile, "rb") as f:
+            lines = f.read().splitlines()
+        # asserting utf-8 encoded output file
+        expected = [b'{', b'    "key": "\xf0\x9f\x92\xa9"', b"}"]
+        self.assertEqual(lines, expected)
+
+    def test_ensure_ascii_default(self):
+        infile = self._create_infile('{"key":"💩"}')
+        outfile = support.TESTFN + '.out'
+        self.addCleanup(os.remove, outfile)
+        assert_python_ok('-m', 'json.tool', infile, outfile)
+        with open(outfile, "rb") as f:
+            lines = f.read().splitlines()
+        # asserting an ascii encoded output file
+        expected = [b'{', rb'    "key": "\ud83d\udca9"', b"}"]
+        self.assertEqual(lines, expected)