Lex XPath axes without a node test.

lib/oga/xpath/lexer.rl

@@ -212,11 +212,7 @@ module Oga
           | 'parent'
           | 'preceding'
           | 'preceding-sibling'
-          | 'self') '::';
+          | 'self');
-
-        action emit_axis_full {
-          emit(:T_AXIS, ts, te - 2)
-        }
 
         # Short Axes
         #
@@ -288,7 +284,10 @@ module Oga
           string  => emit_string;
           integer => emit_integer;
           float   => emit_float;
-          axis_full  => emit_axis_full;
+
+          axis_full      => { emit(:T_AXIS, ts, te) };
+          axis_full '::' => { emit(:T_AXIS, ts, te - 2) };
+
           axis_short => emit_axis_short;
           identifier => emit_identifier;
         *|;

spec/oga/xpath/parser/axes_spec.rb

@@ -44,6 +44,21 @@ describe Oga::XPath::Parser do
       )
     end
 
+    example 'parse the descendant-or-self axis without a test' do
+      parse_xpath('/descendant-or-self').should == s(
+        :absolute_path,
+        s(:axis, 'descendant-or-self')
+      )
+    end
+
+    example 'parse the descendant-or-self axis followed by an attribute axis' do
+      parse_xpath('/descendant-or-self/attribute::foo').should == s(
+        :absolute_path,
+        s(:axis, 'descendant-or-self'),
+        s(:axis, 'attribute', s(:test, nil, 'foo'))
+      )
+    end
+
     example 'parse the following axis' do
       parse_xpath('/following::A').should == s(
         :absolute_path,