Stubbed out a unit test for the new RenderEngine class.

tests/test_renderengine.py

+# coding: utf-8
+
+"""
+Unit tests of renderengine.py.
+
+"""
+
+import cgi
+import unittest
+
+from pystache.context import Context
+from pystache.renderengine import RenderEngine
+
+
+class RenderEngineTestCase(unittest.TestCase):
+
+    """Test the RenderEngine class."""
+
+    def test_render(self):
+        escape = lambda s: cgi.escape(unicode(s))
+        engine = RenderEngine(literal=unicode, escape=escape)
+        context = Context({'person': 'Mom'})
+        actual = engine.render('Hi {{person}}', context)
+        self.assertEquals(actual, 'Hi Mom')