More tests for canonicaljson encoding

Test that unicode and frozendicts are encoded correctly

test_canonicaljson.py

@@ -27,12 +27,22 @@ class TestCanonicalJson(unittest.TestCase):
     def test_encode_canonical(self):
         self.assertEquals(encode_canonical_json({}), b'{}')
 
+        # non-ascii should come out utf8-encoded.
+        self.assertEquals(encode_canonical_json({
+                u"la merde amus\u00c3e": u"\U0001F4A9",
+        }), b'{"la merde amus\xc3\x83e":"\xF0\x9F\x92\xA9"}')
+
     def test_encode_pretty_printed(self):
         self.assertEquals(encode_pretty_printed_json({}), b'{}')
 
     def test_frozen_dict(self):
-        self.assertEquals(encode_canonical_json(frozendict({})), b'{}')
-        self.assertEquals(encode_pretty_printed_json(frozendict({})), b'{}')
+        self.assertEquals(
+            encode_canonical_json(frozendict({"a": 1})),
+            b'{"a":1}',
+        )
+        self.assertEquals(
+            encode_pretty_printed_json(frozendict({"a": 1})),
+            b'{\n    "a": 1\n}')
 
     def test_unknown_type(self):
         class Unknown(object):