Add failing test for error report

spec/r2_spec.rb

@@ -40,6 +40,21 @@
       flipped_css.should == expected_result
     end
 
+    it "handles background-image declarations" do
+      css = <<-EOS
+        .flag {
+          background: url('flags/flag16.png') no-repeat;
+          text-align: left;
+        }
+      EOS
+
+      expected_result = ".flag{background:url('flags/flag16.png') no-repeat;text-align:right;}"
+
+      flipped_css = r2.r2(css)
+
+      flipped_css.should == expected_result
+    end
+
     it "handles SVG background-image declarations" do
       escaped_xml = "%3C%3Fxml%20version%3D%221.0%22%20encoding%3D%22iso-8859-1%22%3F%3E%3C!DOCTYPE%20svg%20PUBLIC%20%22-%2F%2FW3C%2F%2FDTD%20SVG%201.1%2F%2FEN%22%20%22http%3A%2F%2Fwww.w3.org%2FGraphics%2FSVG%2F1.1%2FDTD%2Fsvg11.dtd%22%3E%3Csvg%20version%3D%221.1%22%20id%3D%22Layer_1%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20xmlns%3Axlink%3D%22http%3A%2F%2Fwww.w3.org%2F1999%2Fxlink%22%20x%3D%220px%22%20y%3D%220px%22%20%20width%3D%2214px%22%20height%3D%2214px%22%20viewBox%3D%220%200%2014%2014%22%20style%3D%22enable-background%3Anew%200%200%2014%2014%3B%22%20xml%3Aspace%3D%22preserve%22%3E%3Cpath%20style%3D%22fill%3A%23FFFFFF%3B%22%20d%3D%22M9%2C5v3l5-4L9%2C0v3c0%2C0-5%2C0-5%2C7C6%2C5%2C9%2C5%2C9%2C5z%20M11%2C12H2V5h1l2-2H0v11h13V7l-2%2C2V12z%22%2F%3E%3C%2Fsvg%3E"
       css = <<-EOS