[css mode] add @document tests

mode/css/test.js

@@ -145,4 +145,29 @@
      "[def @supports] ([keyword not] (([property text-align-last]: [atom justify]) [keyword or] ([meta -moz-][property text-align-last]: [atom justify])) {",
      "  [property text-align-last]: [atom justify];",
      "}");
+     
+   MT("document",
+      "[def @document] [tag url]([string http://blah]),",
+      "  [tag url-prefix]([string https://]),",
+      "  [tag domain]([string blah.com]),",
+      "  [tag regexp]([string \".*blah.+\"]) {",
+      "    [builtin #id] {",
+      "      [property background-color]: [keyword white];",
+      "    }",
+      "    [tag foo] {",
+      "      [property font-family]: [variable Verdana], [atom sans-serif];",
+      "    }",
+      "  }");
+     
+   MT("document_url",
+      "[def @document] [tag url]([string http://blah]) { [qualifier .class] { } }");
+     
+   MT("document_urlPrefix",
+      "[def @document] [tag url-prefix]([string https://]) { [builtin #id] { } }");
+     
+   MT("document_domain",
+      "[def @document] [tag domain]([string blah.com]) { [tag foo] { } }");
+     
+   MT("document_regexp",
+      "[def @document] [tag regexp]([string \".*blah.+\"]) { [builtin #id] { } }");
 })();