Lexer specs for the various XPath axes.

spec/oga/xpath/lexer/axes_spec.rb

@@ -1,19 +1,141 @@
 require 'spec_helper'
 
 describe Oga::XPath::Lexer do
-  context 'axes' do
-    example 'lex an axis using the full syntax form' do
-      lex_xpath('/parent::node()').should == [
+  context 'full axes' do
+    example 'lex the ancestor axis' do
+      lex_xpath('/ancestor::A').should == [
         [:T_SLASH, nil],
-        [:T_AXIS, 'parent'],
-        [:T_IDENT, 'node'],
-        [:T_LPAREN, nil],
-        [:T_RPAREN, nil]
+        [:T_AXIS, 'ancestor'],
+        [:T_IDENT, 'A']
       ]
     end
 
-    example 'lex an axis using the short syntax form' do
-      lex_xpath('/..').should == [[:T_SLASH, nil], [:T_AXIS, 'parent']]
+    example 'lex the ancestor-or-self axis' do
+      lex_xpath('/ancestor-or-self::A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'ancestor-or-self'],
+        [:T_IDENT, 'A'],
+      ]
+    end
+
+    example 'lex the attribute axis' do
+      lex_xpath('/attribute::class').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'attribute'],
+        [:T_IDENT, 'class'],
+      ]
+    end
+
+    example 'lex the child axis' do
+      lex_xpath('/child::A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'child'],
+        [:T_IDENT, 'A'],
+      ]
+    end
+
+    example 'lex the descendant axis' do
+      lex_xpath('/descendant::A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'descendant'],
+        [:T_IDENT, 'A'],
+      ]
+    end
+
+    example 'lex the descendant-or-self axis' do
+      lex_xpath('/descendant-or-self::A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'descendant-or-self'],
+        [:T_IDENT, 'A'],
+      ]
+    end
+
+    example 'lex the following axis' do
+      lex_xpath('/following::A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'following'],
+        [:T_IDENT, 'A'],
+      ]
+    end
+
+    example 'lex the follow-sibling axis' do
+      lex_xpath('/following-sibling::A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'following-sibling'],
+        [:T_IDENT, 'A'],
+      ]
+    end
+
+    example 'lex the namespace axis' do
+      lex_xpath('/namespace::A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'namespace'],
+        [:T_IDENT, 'A'],
+      ]
+    end
+
+    example 'lex the parent axis' do
+      lex_xpath('/parent::A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'parent'],
+        [:T_IDENT, 'A'],
+      ]
+    end
+
+    example 'lex the preceding axis' do
+      lex_xpath('/preceding::A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'preceding'],
+        [:T_IDENT, 'A'],
+      ]
+    end
+
+    example 'lex the preceding-sibling axis' do
+      lex_xpath('/preceding-sibling::A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'preceding-sibling'],
+        [:T_IDENT, 'A'],
+      ]
+    end
+
+    example 'lex the self axis' do
+      lex_xpath('/self::A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'self'],
+        [:T_IDENT, 'A'],
+      ]
+    end
+  end
+
+  context 'short axes' do
+    example 'lex the @attribute axis' do
+      lex_xpath('/@A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'attribute'],
+        [:T_IDENT, 'A']
+      ]
+    end
+
+    example 'lex the // axis' do
+      lex_xpath('//A').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'descendant-or-self'],
+        [:T_IDENT, 'A']
+      ]
+    end
+
+    example 'lex the .. axis' do
+      lex_xpath('/..').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'parent']
+      ]
+    end
+
+    example 'lex the . axis' do
+      lex_xpath('/.').should == [
+        [:T_SLASH, nil],
+        [:T_AXIS, 'self']
+      ]
     end
   end
 end