add test for transformer latex

tests/test_transformers.py

@@ -0,0 +1,27 b''
+import io
+import nose.tools as nt
+from nose.tools import nottest
+
+from converters import latex_transformer
+lt = latex_transformer.LatexTransformer()
+lt.enabled = True
+
+@nottest
+def test_space(input, reference):
+    nt.assert_equal(lt.remove_math_space(input),reference)
+    
+
+
+def test_evens():
+    references = [
+            ('$e$','$e$'),
+            ('$ e $','$e$'),
+            ('xxx$e^i$yyy','xxx$e^i$yyy'),
+            ('xxx$ e^i $yyy','xxx$e^i$yyy'),
+            ('xxx$e^i $yyy','xxx$e^i$yyy'),
+            ('xxx$ e^i$yyy','xxx$e^i$yyy'),
+            ('\$ e $ e $','\$ e $e$'),
+            ]
+
+    for k,v in references :
+        yield test_space, k,v