Make integration spec failures more descriptive

spec/integration/integration_spec.rb

@@ -1,22 +1,23 @@
 require 'spec_helper'
 require 'support/dummy_app'
+require 'support/matchers/have_text'
 
 shared_examples_for "a decorator in a view" do
   it "works" do
     # it runs in the correct environment
-    page.should have_css "#environment", text: environment
+    page.should have_text(environment).in("#environment")
 
     # it can use path helpers with a model
-    page.should have_css "#path_with_model", text: "/en/posts/1"
+    page.should have_text("/en/posts/1").in("#path_with_model")
 
     # it can use path helpers with an id
-    page.should have_css "#path_with_id", text: "/en/posts/1"
+    page.should have_text("/en/posts/1").in("#path_with_id")
 
     # it can use url helpers with a model
-    page.should have_css "#url_with_model", text: "http://www.example.com/en/posts/1"
+    page.should have_text("http://www.example.com/en/posts/1").in("#url_with_model")
 
     # it can use url helpers with an id
-    page.should have_css "#url_with_id", text: "http://www.example.com/en/posts/1"
+    page.should have_text("http://www.example.com/en/posts/1").in("#url_with_id")
   end
 end
 

spec/support/matchers/have_text.rb

@@ -0,0 +1,44 @@
+module HaveTextMatcher
+  def have_text(text)
+    HaveText.new(text)
+  end
+
+  class HaveText
+    def initialize(text)
+      @text = text
+    end
+
+    def in(css)
+      @css = css
+      self
+    end
+
+    def matches?(subject)
+      @subject = subject
+
+      @subject.has_css?(@css || "*", text: @text)
+    end
+
+    def failure_message_for_should
+      "expected to find #{@text.inspect} #{within}"
+    end
+
+    def failure_message_for_should_not
+      "expected not to find #{@text.inspect} #{within}"
+    end
+
+    private
+
+    def within
+      "#{inside} within\n#{@subject.html}"
+    end
+
+    def inside
+      @css ? "inside #{@css.inspect}" : "anywhere"
+    end
+  end
+end
+
+RSpec.configure do |config|
+  config.include HaveTextMatcher
+end