Add dummy versions (how appropriate :-) of the APIs getCompilerError()

and setPosition(), to make more of the tests succeed.

lib/python/TAL/DummyEngine.py

@@ -98,8 +98,13 @@ Default = []
 
 name_match = re.compile(r"(?s)(%s):(.*)\Z" % NAME_RE).match
 
+class CompilerError(Exception):
+    pass
+
 class DummyEngine:
 
+    position = None
+
     def __init__(self, macros=None):
         if macros is None:
             macros = {}
@@ -108,6 +113,12 @@ class DummyEngine:
         self.locals = self.globals = dict
         self.stack = [dict]
 
+    def getCompilerError(self):
+        return CompilerError
+
+    def setPosition(self, position):
+        self.position = position
+
     def compile(self, expr):
         return "$%s$" % expr