Cleaned up XPath specs using a shared example.

spec/oga/xpath/evaluator/paths_spec.rb

@@ -11,13 +11,7 @@ describe Oga::XPath::Evaluator do
       @set = @evaluator.evaluate('/a')
     end
 
-    example 'return a NodeSet instance' do
+    it_behaves_like :node_set, :length => 1
-      @set.is_a?(Oga::XML::NodeSet).should == true
-    end
-
-    example 'return the right amount of nodes' do
-      @set.length.should == 1
-    end
 
     example 'return the correct nodes' do
       @set[0].should == @document.children[0]
@@ -29,9 +23,7 @@ describe Oga::XPath::Evaluator do
       @set = @evaluator.evaluate('/x/a')
     end
 
-    example 'return an empty NodeSet' do
+    it_behaves_like :node_set, :length => 0
-      @set.empty?.should == true
-    end
   end
 
   context 'relative paths' do
@@ -39,13 +31,7 @@ describe Oga::XPath::Evaluator do
       @set = @evaluator.evaluate('a')
     end
 
-    example 'return a NodeSet instance' do
+    it_behaves_like :node_set, :length => 1
-      @set.is_a?(Oga::XML::NodeSet).should == true
-    end
-
-    example 'return the right amount of nodes' do
-      @set.length.should == 1
-    end
 
     example 'return the correct nodes' do
       @set[0].should == @document.children[0]
@@ -57,9 +43,7 @@ describe Oga::XPath::Evaluator do
       @set = @evaluator.evaluate('x/a')
     end
 
-    example 'return an empty NodeSet' do
+    it_behaves_like :node_set, :length => 0
-      @set.empty?.should == true
-    end
   end
 
   context 'nested paths' do
@@ -67,13 +51,7 @@ describe Oga::XPath::Evaluator do
       @set = @evaluator.evaluate('/a/b')
     end
 
-    example 'return a NodeSet instance' do
+    it_behaves_like :node_set, :length => 2
-      @set.is_a?(Oga::XML::NodeSet).should == true
-    end
-
-    example 'return the right amount of rows' do
-      @set.length.should == 2
-    end
 
     example 'return the correct nodes' do
       a = @document.children[0]
@@ -88,13 +66,7 @@ describe Oga::XPath::Evaluator do
       @set = @evaluator.evaluate('a/ns1:c')
     end
 
-    example 'return a NodeSet instance' do
+    it_behaves_like :node_set, :length => 1
-      @set.is_a?(Oga::XML::NodeSet).should == true
-    end
-
-    example 'return the right amount of rows' do
-      @set.length.should == 1
-    end
 
     example 'return the correct row' do
       a = @document.children[0]

spec/oga/xpath/evaluator/wildcard_spec.rb

@@ -11,9 +11,7 @@ describe Oga::XPath::Evaluator do
       @set = @evaluator.evaluate('a/*')
     end
 
-    example 'return the right amount of rows' do
+    it_behaves_like :node_set, :length => 3
-      @set.length.should == 3
-    end
 
     example 'include the first <b> node' do
       @set[0].name.should == 'b'
@@ -34,9 +32,7 @@ describe Oga::XPath::Evaluator do
       @set = @evaluator.evaluate('a/*:b')
     end
 
-    example 'return the right amount of rows' do
+    it_behaves_like :node_set, :length => 2
-      @set.length.should == 2
-    end
 
     example 'include the first <b> node' do
       @set[0].name.should == 'b'
@@ -56,9 +52,7 @@ describe Oga::XPath::Evaluator do
       @set = @evaluator.evaluate('a/ns1:*')
     end
 
-    example 'return the right amount of rows' do
+    it_behaves_like :node_set, :length => 1
-      @set.length.should == 1
-    end
 
     example 'include the correct <c> node' do
       @set[0].name.should      == 'c'
@@ -71,9 +65,7 @@ describe Oga::XPath::Evaluator do
       @set = @evaluator.evaluate('a/*:*')
     end
 
-    example 'return the right amount of rows' do
+    it_behaves_like :node_set, :length => 3
-      @set.length.should == 3
-    end
 
     example 'include the first <b> node' do
       @set[0].name.should == 'b'

spec/spec_helper.rb

@@ -7,6 +7,7 @@ end
 
 require_relative '../lib/oga'
 require_relative 'support/parsing'
+require_relative 'support/shared_examples'
 
 RSpec.configure do |config|
   config.color = true

spec/support/shared_examples.rb

@@ -0,0 +1,9 @@
+shared_examples :node_set do |options|
+  example 'return a NodeSet instance' do
+    @set.is_a?(Oga::XML::NodeSet).should == true
+  end
+
+  example 'return the right amount of rows' do
+    @set.length.should == options[:length]
+  end
+end