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 libPath(moduleId)
+{
+  return path.resolve(__dirname, "..", "..", "lib", moduleId + ".js");
+}
+
+function addExports(exports)
+{
+  return function(source)
+  {
+    let extraExports = exports[path.basename(this.filename, ".js")];
+    if (extraExports)
+     for (let name of extraExports)
+       source += `
+         Object.defineProperty(exports, "${name}", {get: () => ${name}});`;
+    return source;
+  };
+}
+
+function rewriteRequires(source)
+{
+  let modules = new Set(["events", "io"]);
+  return source.replace(/(\brequire\(["'])([^"']+)/g, (match, prefix, request) =>
+  {
+    if (modules.has(request))
+      return prefix + request + ".js";
+    return match;
+  });
+}
+
+exports.createSandbox = function(extraExports)
+{
+  let sourceTransformers = [rewriteRequires];
+  if (extraExports)
+    sourceTransformers.push(addExports(extraExports));
+
+  // This module loads itself in a sandbox, then we return its require function
+  // which our tests can then use to require further modules in the sandbox.
+  return SandboxedModule.require("common", {
+    globals: globals,
+    sourceTransformers: sourceTransformers
+  }).require;
+};
+
+exports.require = require;