added assertions for asset-data-url

Author: joenoon

test/fixtures/scss_project/app/assets/images/1x1.png

@@ -14,6 +14,7 @@
   asset-path: asset-path("rails.png", image);
   asset-url: asset-url("rails.png", image);
   image-url: image-url("rails.png");
+  asset-data-url: asset-data-url("1x1.png");
 }
 
 @include without-css-ext;

test/fixtures/scss_project/app/assets/stylesheets/application.css.scss

@@ -77,6 +77,12 @@ class SassRailsTest < Sass::Rails::TestCase
     assert_match css_output, %r{asset-path:\s*"/assets/rails.png"}, 'asset-path:\s*"/assets/rails.png"'
     assert_match css_output, %r{asset-url:\s*url\(/assets/rails.png\)}, 'asset-url:\s*url\(/assets/rails.png\)'
     assert_match css_output, %r{image-url:\s*url\(/assets/rails.png\)}, 'image-url:\s*url\(/assets/rails.png\)'
+
+    asset_data_url_regexp = %r{asset-data-url:\s*url\((.*?)\)}
+    assert_match css_output, asset_data_url_regexp, 'asset-data-url:\s*url\((.*?)\)'
+    asset_data_url_match = css_output.match(asset_data_url_regexp)[1]
+    asset_data_url_expected = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAyRpVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw%2FeHBhY2tldCBiZWdpbj0i77u%2FIiBpZD0iVzVNME1wQ2VoaUh6cmVTek5UY3prYzlkIj8%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%2BIDx4bXBNTTpEZXJpdmVkRnJvbSBzdFJlZjppbnN0YW5jZUlEPSJ4bXAuaWlkOkE3MzcyNTQ2RDY2QjExRTA5RTMzQTlDQTZFODJBQTFCIiBzdFJlZjpkb2N1bWVudElEPSJ4bXAuZGlkOkI3Njk0MTVBRDY2QzExRTA5RTMzQTlDQTZFODJBQTFCIi8%2BIDwvcmRmOkRlc2NyaXB0aW9uPiA8L3JkZjpSREY%2BIDwveDp4bXBtZXRhPiA8P3hwYWNrZXQgZW5kPSJyIj8%2B0HhJ9AAAABBJREFUeNpi%2BP%2F%2FPwNAgAEACPwC%2FtuiTRYAAAAASUVORK5CYII%3D"
+    assert_equal asset_data_url_expected, asset_data_url_match
   end
   test "css compressor compresses" do
     assert_equal "div{color:red}\n", Sass::Rails::CssCompressor.new.compress(<<CSS)