Revamp namespace compiler specs

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

@@ -1,29 +1,56 @@
 require 'spec_helper'
 
 describe Oga::XPath::Compiler do
-  describe 'namespace axis' do
-    before do
-      @document = parse('<root xmlns:x="x"><foo xmlns:y="y"></foo></root>')
+  before do
+    @document = parse('<root xmlns:x="x" foo="bar"><foo xmlns:y="y"></foo></root>')
 
-      @ns_x = @document.children[0].namespaces['x']
-      @ns_y = @document.children[0].children[0].namespaces['y']
+    @ns_x = @document.children[0].namespaces['x']
+    @ns_y = @document.children[0].children[0].namespaces['y']
+  end
+
+  describe 'relative to a document' do
+    describe 'namespace::*' do
+      it 'returns an empty NodeSet' do
+        evaluate_xpath(@document).should == node_set
+      end
     end
 
-    it 'returns an empty node set for the document' do
-      evaluate_xpath(@document, 'namespace::*').should == node_set
+    describe 'root/namespace::x' do
+      it 'returns a NodeSet' do
+        evaluate_xpath(@document).should == node_set(@ns_x)
+      end
     end
 
-    it 'returns a node set containing the namespaces for root' do
-      evaluate_xpath(@document, 'root/namespace::x').should == node_set(@ns_x)
+    describe 'root/foo/namespace::*' do
+      it 'returns a NodeSet' do
+        evaluate_xpath(@document).should == node_set(@ns_y, @ns_x)
+      end
     end
 
-    it 'returns a node set containing the namespaces for root/foo' do
-      evaluate_xpath(@document, 'root/foo/namespace::*')
-        .should == node_set(@ns_y, @ns_x)
+    describe 'root/namespace::*' do
+      it 'returns a NodeSet' do
+        evaluate_xpath(@document).should == node_set(@ns_x)
+      end
     end
+  end
 
-    it 'returns a node set containing the namespaces for root using a wildcard' do
-      evaluate_xpath(@document, 'root/namespace::*').should == node_set(@ns_x)
+  describe 'relative to an element' do
+    describe 'namespace::x' do
+      it 'returns a NodeSet' do
+        root = @document.children[0]
+
+        evaluate_xpath(root).should == node_set(@ns_x)
+      end
+    end
+  end
+
+  describe 'relative to an attribute' do
+    describe 'namespace::x' do
+      it 'returns an empty NodeSet' do
+        root = @document.children[0]
+
+        evaluate_xpath(root.attribute('foo')).should == node_set
+      end
     end
   end
 end