Tests: Add ICE detection test.

ICE is the internal boilerplate we use to freeze/unfreeze themes when
trying to force-feed them Markdown or other formatted data.

src/utils/file-contains.js

@@ -0,0 +1,12 @@
+/**
+Definition of the SyntaxErrorEx class.
+@module file-contains.js
+*/
+
+(function(){
+
+  module.exports = function( file, needle ) {
+    return require('fs').readFileSync(file,'utf-8').indexOf( needle ) > -1;
+  };
+
+}());