Issue 4223 - Migrate some more of adblockplustests

test/stub-modules/common.js

+let path = require("path");
+let SandboxedModule = require("sandboxed-module");
+
+let globals = {
+  atob: data => new Buffer(data, "base64").toString("binary"),
+  btoa: data => new Buffer(data, "binary").toString("base64"),
+  Ci: {},
+  Cu: {import: () => { }},
+  navigator: {},
+  onShutdown: {add: () => { }},
+  Services: {obs: {addObserver: () => { }}},
+  XPCOMUtils: {generateQI: () => { }}
+};
+
+function bodgeExports(exports)
+{
+  return src => src + "\n" + exports.
+    map(name => "Object.defineProperty(exports, '" + name + "'," +
+        "{get: () => " + name + "});").join("\n");
+}
+
+function libPath(moduleId)
+{
+  return path.resolve(__dirname, "..", "..", "lib", moduleId + ".js");
+}
+
+exports.createSandbox = function(extraExports)
+{
+  // Shared require cache for this sandbox
+  let cache = {};
+
+  // For any modules which we need extra exports we must transform them now.
+  for (let moduleId in extraExports)
+    cache[libPath(moduleId)] = SandboxedModule.require(moduleId, {
+      cache: cache,
+      globals: globals,
+      sourceTransformers: [bodgeExports(extraExports[moduleId])],
+      sourceTransformersSingleOnly: true,
+      singleOnly: false
+    });
+
+  return (moduleId, exports) =>
+  {
+    let key = libPath(moduleId);
+
+    // Only load modules which aren't already cached for this sandbox
+    if (!(key in cache))
+      cache[key] = SandboxedModule.require(moduleId, {
+        cache: cache,
+        globals: globals
+      });
+
+    return cache[key];
+  };
+};