diff --git a/light9/effecteval/test_effect.py b/light9/effecteval/test_effect.py
new file mode 100644
--- /dev/null
+++ b/light9/effecteval/test_effect.py
@@ -0,0 +1,52 @@
+import unittest
+import mock
+import sys
+sys.path.insert(0, 'bin') # for run_local
+
+from effect import CodeLine
+from rdflib import URIRef
+
+def isCurve(self, uri):
+    return 'curve' in uri
+
+@mock.patch('light9.effecteval.effect.CodeLine._uriIsCurve', new=isCurve)
+class TestAsPython(unittest.TestCase):
+    def test_gets_lname(self):
+        ec = CodeLine(graph=None, code='x = y+1')
+        self.assertEqual('x', ec._asPython()[0])
+
+    def test_gets_simple_code(self):
+        ec = CodeLine(graph=None, code='x = y+1')
+        self.assertEqual('y+1', ec._asPython()[1])
+        self.assertEqual({}, ec._asPython()[2])
+        
+    def test_converts_uri_to_var(self):
+        ec = CodeLine(graph=None, code='x = <http://example.com/>')
+        _, expr, uris = ec._asPython()
+        self.assertEqual('_res0', expr)
+        self.assertEqual({'_res0': URIRef('http://example.com/')}, uris)
+
+    def test_converts_multiple_uris(self):
+        ec = CodeLine(graph=None, code='x = <http://example.com/> + <http://other>')
+        _, expr, uris = ec._asPython()
+        self.assertEqual('_res0 + _res1', expr)
+        self.assertEqual({'_res0': URIRef('http://example.com/'),
+                          '_res1': URIRef('http://other')}, uris)
+        
+    def test_doesnt_fall_for_brackets(self):
+        ec = CodeLine(graph=None, code='x = 1<2>3< h')
+        _, expr, uris = ec._asPython()
+        self.assertEqual('1<2>3< h', expr)
+        self.assertEqual({}, uris)
+        
+    def test_curve_uri_expands_to_curve_eval_func(self):
+        ec = CodeLine(graph=None, code='x = <http://example/curve1>')
+        _, expr, uris = ec._asPython()
+        self.assertEqual('curve(_res0, t)', expr)
+        self.assertEqual({'_res0': URIRef('http://example/curve1')}, uris)
+
+    def test_curve_doesnt_double_wrap(self):
+        ec = CodeLine(graph=None, code='x = curve(<http://example/curve1>, t+.01)')
+        _, expr, uris = ec._asPython()
+        self.assertEqual('curve(_res0, t+.01)', expr)
+        self.assertEqual({'_res0': URIRef('http://example/curve1')}, uris)