Added unit tests for the behavior of tal:attributes with 'default'.

Fixed Collector #580 by making evaluateBoolean() an alias for evaluate().

doc/CHANGES.txt

@@ -6,6 +6,8 @@ Zope Changes
 
     Bugs Fixed
 
+      - Collector #580: TALES evaluateBoolean() was squishing 'default'.
+
       - Collector #581: TALES Path traversal should not special-case a blank
         string in the second element position.  It now skips directly
         to item access when a path element is blank or has a leading '_'.

lib/python/Products/PageTemplates/TALES.py

@@ -15,7 +15,7 @@
 An implementation of a generic TALES engine
 """
 
-__version__='$Revision: 1.34 $'[11:-2]
+__version__='$Revision: 1.35 $'[11:-2]
 
 import re, sys, ZTUtils
 from MultiMapping import MultiMapping
@@ -214,9 +214,7 @@ class Context:
         return expression(self)
 
     evaluateValue = evaluate
-
-    def evaluateBoolean(self, expr):
-        return not not self.evaluate(expr)
+    evaluateBoolean = evaluate
 
     def evaluateText(self, expr):
         text = self.evaluate(expr)

lib/python/TAL/tests/input/test12.html

@@ -8,17 +8,22 @@
 <img ismap tal:attributes="ismap true">
 <img ismap tal:attributes="ismap false">
 <img ismap tal:attributes="ismap nothing">
+<img ismap tal:attributes="ismap default">
 
 <img ismap="foo" tal:attributes="ismap true">
 <img ismap="foo" tal:attributes="ismap false">
 <img ismap="foo" tal:attributes="ismap nothing">
+<img ismap="foo" tal:attributes="ismap default">
 
 <img tal:attributes="ismap true">
 <img tal:attributes="ismap false">
 <img tal:attributes="ismap nothing">
+<img tal:attributes="ismap default">
 
 <span tal:define="global x string:x.gif" />
 
 <img src="foo">
 <img src="foo" tal:attributes="src x">
 <img src="foo" tal:attributes="src nothing">
+<img src="foo" tal:attributes="src default">
+<img tal:attributes="src default">

lib/python/TAL/tests/output/test12.html

@@ -8,17 +8,22 @@
 <img ismap="ismap">
 <img>
 <img>
+<img ismap="ismap">
 
 <img ismap="ismap">
 <img>
 <img>
+<img ismap="foo">
 
 <img ismap="ismap">
 <img>
 <img>
+<img>
 
 <span />
 
 <img src="foo">
 <img src="x.gif">
 <img>
+<img src="foo">
+<img>