Add test for no_escape arg of json.tool

Author: dhimmel

Lib/test/test_json/test_tool.py

@@ -68,22 +68,22 @@ def test_stdin_stdout(self):
         self.assertEqual(out.splitlines(), self.expect.encode().splitlines())
         self.assertEqual(err, None)
 
-    def _create_infile(self):
+    def _create_infile(self, text):
         infile = support.TESTFN
         with open(infile, "w") as fp:
             self.addCleanup(os.remove, infile)
-            fp.write(self.data)
+            fp.write(text)
         return infile
 
     def test_infile_stdout(self):
-        infile = self._create_infile()
+        infile = self._create_infile(self.data)
         rc, out, err = assert_python_ok('-m', 'json.tool', infile)
         self.assertEqual(rc, 0)
         self.assertEqual(out.splitlines(), self.expect.encode().splitlines())
         self.assertEqual(err, b'')
 
     def test_infile_outfile(self):
-        infile = self._create_infile()
+        infile = self._create_infile(self.data)
         outfile = support.TESTFN + '.out'
         rc, out, err = assert_python_ok('-m', 'json.tool', infile, outfile)
         self.addCleanup(os.remove, outfile)
@@ -100,9 +100,22 @@ def test_help_flag(self):
         self.assertEqual(err, b'')
 
     def test_sort_keys_flag(self):
-        infile = self._create_infile()
+        infile = self._create_infile(self.data)
         rc, out, err = assert_python_ok('-m', 'json.tool', '--sort-keys', infile)
         self.assertEqual(rc, 0)
         self.assertEqual(out.splitlines(),
                          self.expect_without_sort_keys.encode().splitlines())
         self.assertEqual(err, b'')
+
+    def test_no_ascii_flag(self):
+        data = '{"json": "🐍 and δ"}'
+        expect = textwrap.dedent('''\
+        {
+            "json": "🐍 and δ"
+        }
+        ''')
+        infile = self._create_infile(data)
+        rc, out, err = assert_python_ok('-m', 'json.tool', '--no_ascii', infile)
+        self.assertEqual(rc, 0)
+        self.assertEqual(out.splitlines(), expect.splitlines())
+        self.assertEqual(err, b'')