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gaia/shared/test/unit/load_body_html_helper.js

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+(function(global) {
+'use strict';
+
+var parser = new DOMParser();
+var bodyHTML = {};
+
+function getFile(filename, callback) {
+  var req = new XMLHttpRequest();
+  req.open('GET', filename, false);
+  req.onerror = function() {
+    throw new Error('Unable to load ' + filename + ' for body HTML');
+  };
+  req.send();
+  if (req.status !== 200) {
+    req.onerror();
+  }
+
+  // parse and sanitize the document
+  var doc = parser.parseFromString(req.response, 'text/html');
+  if (!doc) {
+    throw new Error('Unable to parse ' + filename + ' for body HTML');
+  }
+
+  // remove scripts for safety
+  var scripts = doc.querySelectorAll('script');
+  Array.prototype.forEach.call(scripts, function(scriptNode) {
+    scriptNode.parentNode.removeChild(scriptNode);
+  });
+
+  // copy html from body tag
+  bodyHTML[filename] = doc.body.innerHTML;
+}
+
+function loadBodyHTML(filename) {
+  if (!(filename in bodyHTML)) {
+    getFile(filename);
+  }
+  document.body.innerHTML = bodyHTML[filename];
+}
+
+global.loadBodyHTML = loadBodyHTML;
+
+}(this));