Add a css selector method.

We'll soon have this make more sense by returning a more presentable version
of the selector used to match elements.

Author: kaspth

lib/rails/dom/testing/assertions/selector_assertions.rb

@@ -172,7 +172,8 @@ def assert_select(*args, &block)
           end
 
           selector.select.tap do |matches|
-            assert_size_match!(matches.size, selector.tests, selector.selector, selector.message)
+            assert_size_match!(matches.size, selector.tests,
+              selector.css_selector, selector.message)
 
             nest_selection(matches, &block) if block_given? && !matches.empty?
           end

lib/rails/dom/testing/assertions/selector_assertions/html_selector.rb

@@ -2,12 +2,12 @@
 require_relative 'substitution_context'
 
 class HTMLSelector #:nodoc:
-  attr_reader :selector, :tests, :message
+  attr_reader :css_selector, :tests, :message
 
   def initialize(values, previous_selection = nil, &root_fallback)
     @values = values
     @root = extract_root(previous_selection, root_fallback)
-    @selector = extract_selector
+    @css_selector = @selector = extract_selector
     @tests = extract_equality_tests
     @message = @values.shift
 
@@ -23,7 +23,7 @@ def selecting_no_body? #:nodoc:
   end
 
   def select
-    filter @root.css(selector, context)
+    filter @root.css(@selector, context)
   end
 
   private