lang: fixes for invalid detection on class.property, numeric was also…

… taken as a class.property. Closes #34

kivy/lang.py

@@ -459,7 +459,7 @@ def create_handler(element, key, value, idmap):
     tmp = re.sub('([\'"][^\'"]*[\'"])', '', value)
 
     # detect key.value inside value
-    kw = re.findall('([a-zA-Z0-9_.]+\.[a-zA-Z0-9_.]+)', tmp)
+    kw = re.findall('([a-zA-Z_][a-zA-Z0-9_.]*\.[a-zA-Z0-9_.]+)', tmp)
     if not kw:
         # look like no reference, just pass it
         return eval(value, _eval_globals)

kivy/tests/test_lang.py

@@ -0,0 +1,44 @@
+'''
+Language tests
+==============
+'''
+
+import unittest
+
+class TestClass(object):
+    obj = None
+
+class LangTestCase(unittest.TestCase):
+
+    def import_builder(self):
+        from kivy.factory import Factory
+        from kivy.lang import Builder
+        Factory.register('TestClass', cls=TestClass)
+        return Builder
+
+    def test_loading_failed_1(self):
+        # invalid indent
+        Builder = self.import_builder()
+        from kivy.lang import ParserError
+        try:
+            Builder.load_string('''#:kivy 1.0
+            <TestClass>:
+            ''')
+            self.fail('Invalid indentation.')
+        except ParserError:
+            pass
+
+    def test_parser_numeric_1(self):
+        Builder = self.import_builder()
+        Builder.load_string('<TestClass>:\n\tobj: (.5, .5, .5)')
+        wid = TestClass()
+        Builder.apply(wid)
+        self.assertEqual(wid.obj, (0.5, 0.5, 0.5))
+
+    def test_parser_numeric_2(self):
+        Builder = self.import_builder()
+        Builder.load_string('<TestClass>:\n\tobj: (0.5, 0.5, 0.5)')
+        wid = TestClass()
+        Builder.apply(wid)
+        self.assertEqual(wid.obj, (0.5, 0.5, 0.5))
+