Rewrote context names of some XPath specs.

spec/oga/xpath/evaluator/axes/ancestor_or_self_spec.rb

@@ -3,7 +3,7 @@ require 'spec_helper'
 describe Oga::XPath::Evaluator do
   context 'ancestor-or-self axis' do
     before do
-      @document  = parse('<a><b><c></c></b><d></d><a></a></a>')
+      @document  = parse('<a><b><c></c></b></a>')
       @c_node    = @document.children[0].children[0].children[0]
       @evaluator = described_class.new(@c_node)
     end
@@ -32,7 +32,7 @@ describe Oga::XPath::Evaluator do
       end
     end
 
-    context 'missing ancestors' do
+    context 'ancestors that only match the context nodes' do
       before do
         @set = @evaluator.evaluate('ancestor-or-self::c')
       end

spec/oga/xpath/evaluator/axes/ancestor_spec.rb

@@ -3,7 +3,7 @@ require 'spec_helper'
 describe Oga::XPath::Evaluator do
   context 'ancestor axis' do
     before do
-      @document  = parse('<a><b><c></c></b><d></d><a></a></a>')
+      @document  = parse('<a><b><c></c></b></a>')
       @c_node    = @document.children[0].children[0].children[0]
       @evaluator = described_class.new(@c_node)
     end
@@ -32,7 +32,7 @@ describe Oga::XPath::Evaluator do
       end
     end
 
-    context 'missing ancestors' do
+    context 'non existing ancestors' do
       before do
         @set = @evaluator.evaluate('ancestor::foobar')
       end

spec/oga/xpath/evaluator/axes/attribute_spec.rb

@@ -39,7 +39,7 @@ describe Oga::XPath::Evaluator do
       end
     end
 
-    context 'missing attributes' do
+    context 'non existing attributes' do
       before do
         @set = @evaluator.evaluate('attribute::bar')
       end

spec/oga/xpath/evaluator/axes/child_spec.rb

@@ -3,7 +3,7 @@ require 'spec_helper'
 describe Oga::XPath::Evaluator do
   context 'child axis' do
     before do
-      @document  = parse('<a><b><c></c></b><d></d><a></a></a>')
+      @document  = parse('<a><b></b></a>')
       @evaluator = described_class.new(@document)
     end
 
@@ -31,9 +31,9 @@ describe Oga::XPath::Evaluator do
       end
     end
 
-    context 'invalid children' do
+    context 'non existing children' do
       before do
-        @set = @evaluator.evaluate('child::foobar')
+        @set = @evaluator.evaluate('child::b')
       end
 
       it_behaves_like :empty_node_set

spec/oga/xpath/evaluator/axes/descendant_spec.rb

@@ -3,7 +3,7 @@ require 'spec_helper'
 describe Oga::XPath::Evaluator do
   context 'descendant axis' do
     before do
-      @document  = parse('<a><b><c></c></b><d></d><a></a></a>')
+      @document  = parse('<a><b><c></c></b><a></a></a>')
       @evaluator = described_class.new(@document)
 
       @first_a  = @document.children[0]
@@ -50,7 +50,7 @@ describe Oga::XPath::Evaluator do
       end
     end
 
-    context 'invalid descendants' do
+    context 'non existing descendants' do
       before do
         @set = @evaluator.evaluate('descendant::foobar')
       end