Add TestUtils; implement two tests for it.

Also, add a missing docstring in TreeEqualityTestCase.

tests/_test_tree_equality.py

@@ -35,6 +35,7 @@ class TreeEqualityTestCase(TestCase):
     """
 
     def assertNodeEqual(self, expected, actual):
+        """Assert that two Nodes have the same type and have the same data."""
         registry = {
             Text: self.assertTextNodeEqual,
             Template: self.assertTemplateNodeEqual,

tests/test_utils.py

@@ -0,0 +1,67 @@
+# -*- coding: utf-8  -*-
+#
+# Copyright (C) 2012-2013 Ben Kurtovic <ben.kurtovic@verizon.net>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from __future__ import unicode_literals
+import unittest
+
+from mwparserfromhell.nodes import Template, Text
+from mwparserfromhell.smart_list import SmartList
+from mwparserfromhell.utils import parse_anything
+from mwparserfromhell.wikicode import Wikicode
+
+from ._test_tree_equality import TreeEqualityTestCase
+
+class TestUtils(TreeEqualityTestCase):
+    """Tests for the utils module, which provides parse_anything()."""
+
+    def test_parse_anything_valid(self):
+        """tests for valid input to utils.parse_anything()"""
+        wrap = lambda L: Wikicode(SmartList(L))
+        textify = lambda L: wrap([Text(item) for item in L])
+        tests = [
+            (wrap([Text("foobar")]), textify(["foobar"])),
+            (Template(wrap([Text("spam")])),
+                wrap([Template(textify(["spam"]))])),
+            ("fóóbar", textify(["fóóbar"])),
+            (b"foobár", textify(["foobár"])),
+            (123, textify(["123"])),
+            (True, textify(["True"])),
+            (None, wrap([])),
+            ([Text("foo"), Text("bar"), Text("baz")],
+                textify(["foo", "bar", "baz"])),
+            ([wrap([Text("foo")]), Text("bar"), "baz", 123, 456],
+                textify(["foo", "bar", "baz", "123", "456"])),
+            ([[[([[((("foo",),),)], "bar"],)]]], textify(["foo", "bar"]))
+        ]
+        for test, valid in tests:
+            self.assertWikicodeEqual(valid, parse_anything(test))
+
+    def test_parse_anything_invalid(self):
+        """tests for invalid input to utils.parse_anything()"""
+        self.assertRaises(ValueError, parse_anything, Ellipsis)
+        self.assertRaises(ValueError, parse_anything, object)
+        self.assertRaises(ValueError, parse_anything, object())
+        self.assertRaises(ValueError, parse_anything, type)
+        self.assertRaises(ValueError, parse_anything, ["foo", [object]])
+
+if __name__ == "__main__":
+    unittest.main(verbosity=2)