Issue #10572: Moved json tests to Lib/test/json_tests.

Approved by Raymond Hettinger.

Lib/test/json_tests/test_indent.py

@@ -0,0 +1,45 @@
+from unittest import TestCase
+
+import json
+import textwrap
+
+class TestIndent(TestCase):
+    def test_indent(self):
+        h = [['blorpie'], ['whoops'], [], 'd-shtaeou', 'd-nthiouh', 'i-vhbjkhnth',
+             {'nifty': 87}, {'field': 'yes', 'morefield': False} ]
+
+        expect = textwrap.dedent("""\
+        [
+        \t[
+        \t\t"blorpie"
+        \t],
+        \t[
+        \t\t"whoops"
+        \t],
+        \t[],
+        \t"d-shtaeou",
+        \t"d-nthiouh",
+        \t"i-vhbjkhnth",
+        \t{
+        \t\t"nifty": 87
+        \t},
+        \t{
+        \t\t"field": "yes",
+        \t\t"morefield": false
+        \t}
+        ]""")
+
+
+        d1 = json.dumps(h)
+        d2 = json.dumps(h, indent=2, sort_keys=True, separators=(',', ': '))
+        d3 = json.dumps(h, indent='\t', sort_keys=True, separators=(',', ': '))
+
+        h1 = json.loads(d1)
+        h2 = json.loads(d2)
+        h3 = json.loads(d3)
+
+        self.assertEqual(h1, h)
+        self.assertEqual(h2, h)
+        self.assertEqual(h3, h)
+        self.assertEqual(d2, expect.expandtabs(2))
+        self.assertEqual(d3, expect)