ci: ensure all tests are running setup

test/namespaces/test_namespaces_preservation.rb

@@ -5,6 +5,7 @@ module XML
     class TestNamespacePreservation < Nokogiri::TestCase
 
       def setup
+        super
         @xml = Nokogiri.XML <<-eoxml
               <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
                 <xs:element xmlns:quer="http://api.geotrust.com/webtrust/query"/>

test/test_xslt_transforms.rb

@@ -2,6 +2,7 @@
 
 class TestXsltTransforms < Nokogiri::TestCase
   def setup
+    super
     @doc = Nokogiri::XML(File.open(XML_FILE))
   end
 

test/xml/sax/test_parser_context.rb

@@ -7,6 +7,7 @@ module XML
     module SAX
       class TestParserContext < Nokogiri::SAX::TestCase
         def setup
+          super
           @xml = '<hello>
 
 world

test/xml/test_relax_ng.rb

@@ -4,6 +4,7 @@ module Nokogiri
   module XML
     class TestRelaxNG < Nokogiri::TestCase
       def setup
+        super
         assert @schema = Nokogiri::XML::RelaxNG(File.read(ADDRESS_SCHEMA_FILE))
       end
 

test/xml/test_schema.rb

@@ -4,6 +4,7 @@ module Nokogiri
   module XML
     class TestSchema < Nokogiri::TestCase
       def setup
+        super
         assert @xsd = Nokogiri::XML::Schema(File.read(PO_SCHEMA_FILE))
       end
 

test/xml/test_unparented_node.rb

@@ -6,6 +6,7 @@ module Nokogiri
   module XML
     class TestUnparentedNode < Nokogiri::TestCase
       def setup
+        super
         begin
           xml = Nokogiri::XML.parse(File.read(XML_FILE), XML_FILE)
           @node = xml.at('staff')