Revamp compiler "following" specs

spec/oga/xpath/compiler/axes/following_sibling_spec.rb

@@ -13,7 +13,7 @@ describe Oga::XPath::Compiler do
   </foo>
   <baz></baz>
 </root>
-      EOF
+    EOF
 
     @bar1 = @document.children[0].children[0].children[0]
     @baz1 = @document.children[0].children[0].children[1]

spec/oga/xpath/compiler/axes/following_spec.rb

@@ -1,11 +1,10 @@
 require 'spec_helper'
 
 describe Oga::XPath::Compiler do
-  describe 'following axis' do
-    before do
-      # Strip whitespace so it's easier to retrieve/compare elements.
-      @document = parse(<<-EOF.strip.gsub(/\s+/m, ''))
-<root>
+  before do
+    # Strip whitespace so it's easier to retrieve/compare elements.
+    @document = parse(<<-EOF.strip.gsub(/^\s+|\n/m, ''))
+<root foo="bar">
   <foo>
     <bar></bar>
     <baz>
@@ -14,33 +13,51 @@ describe Oga::XPath::Compiler do
   </foo>
   <baz></baz>
 </root>
-      EOF
+    EOF
 
-      @bar1 = @document.children[0].children[0].children[0]
-      @baz1 = @document.children[0].children[0].children[1]
-      @baz2 = @baz1.children[0]
-      @baz3 = @document.children[0].children[1]
-    end
+    @bar1 = @document.children[0].children[0].children[0]
+    @baz1 = @document.children[0].children[0].children[1]
+    @baz2 = @baz1.children[0]
+    @baz3 = @document.children[0].children[1]
+  end
 
+  describe 'relative to a document' do
     # This should return an empty set since the document doesn't have any
     # following nodes.
-    it 'returns an empty node set for the sibling of a document' do
-      evaluate_xpath(@document, 'following::foo').should == node_set
+    describe 'following::foo' do
+      it 'returns an empty NodeSet' do
+        evaluate_xpath(@document).should == node_set
+      end
     end
 
-    it 'returns a node set containing the following nodes of root/foo' do
-      evaluate_xpath(@document, 'root/foo/following::baz')
-        .should == node_set(@baz3)
+    describe 'root/foo/following::baz' do
+      it 'returns a NodeSet' do
+        evaluate_xpath(@document).should == node_set(@baz3)
+      end
     end
 
-    it 'returns a node set containing the following nodes of root/foo/bar' do
-      evaluate_xpath(@document, 'root/foo/bar/following::baz')
-        .should == node_set(@baz1, @baz2, @baz3)
+    describe 'root/foo/bar/following::baz' do
+      it 'returns a NodeSet' do
+        evaluate_xpath(@document).should == node_set(@baz1, @baz2, @baz3)
+      end
     end
+  end
 
-    it 'returns a node set containing the siblings relative to root/foo/bar' do
-      evaluate_xpath(@bar1, 'following::baz')
-        .should == node_set(@baz1, @baz2, @baz3)
+  describe 'relative to an element' do
+    describe 'following::baz' do
+      it 'returns a NodeSet' do
+        evaluate_xpath(@bar1).should == node_set(@baz1, @baz2, @baz3)
+      end
+    end
+  end
+
+  describe 'relative to an attribute' do
+    describe 'following::foo' do
+      it 'returns an empty NodeSet' do
+        root = @document.children[0]
+
+        evaluate_xpath(root.attribute('foo')).should == node_set
+      end
     end
   end
 end