Issue 4125 - [emscripten] Convert filter classes to C++

test/_common.js

Index: test/_common.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/test/_common.js
@@ -0,0 +1,434 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2016 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+"use strict";
+
+let fs = require("fs");
+let path = require("path");
+let SandboxedModule = require("sandboxed-module");
+
+const Cr = exports.Cr = {
+  NS_OK: 0,
+  NS_BINDING_ABORTED: 0x804B0002,
+  NS_ERROR_FAILURE: 0x80004005
+};
+
+const MILLIS_IN_SECOND = exports.MILLIS_IN_SECOND = 1000;
+const MILLIS_IN_MINUTE = exports.MILLIS_IN_MINUTE = 60 * MILLIS_IN_SECOND;
+const MILLIS_IN_HOUR = exports.MILLIS_IN_HOUR = 60 * MILLIS_IN_MINUTE;
+const MILLIS_IN_DAY = exports.MILLIS_IN_DAY = 24 * MILLIS_IN_HOUR;
+
+let globals = {
+  atob: data => new Buffer(data, "base64").toString("binary"),
+  btoa: data => new Buffer(data, "binary").toString("base64"),
+  Ci: {
+  },
+  Cu: {
+    import: () => {},
+    reportError: e => undefined
+  },
+  console: {
+    log: () => undefined,
+    error: () => undefined,
+  },
+  navigator: {
+  },
+  onShutdown: {
+    add: () =>
+    {
+    }
+  },
+  Services: {
+    obs: {
+      addObserver: () =>
+      {
+      }
+    },
+    vc: {
+      compare: (v1, v2) =>
+      {
+        function comparePart(p1, p2)
+        {
+          if (p1 != "*" && p2 == "*")
+            return -1;
+          else if (p1 == "*" && p2 != "*")
+            return 1;
+          else if (p1 == p2)
+            return 0;
+          else
+            return parseInt(p1, 10) - parseInt(p2, 10);
+        }
+
+        let parts1 = v1.split(".");
+        let parts2 = v2.split(".");
+        for (let i = 0; i < Math.max(parts1.length, parts2.length); i++)
+        {
+          let result = comparePart(parts1[i] || "0", parts2[i] || "0");
+          if (result != 0)
+            return result;
+        }
+        return 0;
+      }
+    }
+  },
+  XPCOMUtils: {
+    generateQI: () =>
+    {
+    }
+  },
+  URL: function(urlString)
+  {
+    return require("url").parse(urlString);
+  }
+};
+
+let knownModules = new Map();
+for (let dir of [path.join(__dirname, "stub-modules"),
+                 path.join(__dirname, "..", "lib")])
+  for (let file of fs.readdirSync(path.resolve(dir)))
+    if (path.extname(file) == ".js")
+      knownModules[path.basename(file, ".js")] = path.resolve(dir, file);
+
+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)
+{
+  function escapeString(str)
+  {
+    return str.replace(/(["'\\])/g, "\\$1");
+  }
+
+  return source.replace(/(\brequire\(["'])([^"']+)/g, (match, prefix, request) =>
+  {
+    if (request in knownModules)
+      return prefix + escapeString(knownModules[request]);
+    return match;
+  });
+}
+
+exports.createSandbox = function(options)
+{
+  if (!options)
+    options = {};
+
+  let sourceTransformers = [rewriteRequires];
+  if (options.extraExports)
+    sourceTransformers.push(addExports(options.extraExports));
+
+  // This module loads itself into a sandbox, keeping track of the require
+  // function which can be used to load further modules into the sandbox.
+  return SandboxedModule.require("./_common", {
+    globals: Object.assign({}, globals, options.globals),
+    sourceTransformers: sourceTransformers
+  }).require;
+};
+
+exports.require = require;
+
+exports.setupTimerAndXMLHttp = function()
+{
+  let currentTime = 100000 * MILLIS_IN_HOUR;
+  let startTime = currentTime;
+
+  let fakeTimer = {
+    callback: null,
+    delay: -1,
+    nextExecution: 0,
+
+    initWithCallback: function(callback, delay, type)
+    {
+      if (this.callback)
+        throw new Error("Only one timer instance supported");
+      if (type != 1)
+        throw new Error("Only TYPE_REPEATING_SLACK timers supported");
+
+      this.callback = callback;
+      this.delay = delay;
+      this.nextExecution = currentTime + delay;
+    },
+
+    trigger: function()
+    {
+      if (currentTime < this.nextExecution)
+        currentTime = this.nextExecution;
+      try
+      {
+        this.callback();
+      }
+      finally
+      {
+        this.nextExecution = currentTime + this.delay;
+      }
+    },
+
+    cancel: function()
+    {
+      this.nextExecution = -1;
+    }
+  };
+
+  let requests = [];
+  function XMLHttpRequest()
+  {
+    this._host = "http://example.com";
+    this._loadHandlers = [];
+    this._errorHandlers = [];
+  };
+  XMLHttpRequest.prototype =
+  {
+    _path: null,
+    _data: null,
+    _queryString: null,
+    _loadHandlers: null,
+    _errorHandlers: null,
+    status: 0,
+    readyState: 0,
+    responseText: null,
+
+    addEventListener: function(eventName, handler, capture)
+    {
+      let list;
+      if (eventName == "load")
+        list = this._loadHandlers;
+      else if (eventName == "error")
+        list = this._errorHandlers;
+      else
+        throw new Error("Event type " + eventName + " not supported");
+
+      if (list.indexOf(handler) < 0)
+        list.push(handler);
+    },
+
+    removeEventListener: function(eventName, handler, capture)
+    {
+      let list;
+      if (eventName == "load")
+        list = this._loadHandlers;
+      else if (eventName == "error")
+        list = this._errorHandlers;
+      else
+        throw new Error("Event type " + eventName + " not supported");
+
+      let index = list.indexOf(handler);
+      if (index >= 0)
+        list.splice(index, 1);
+    },
+
+    open: function(method, url, async, user, password)
+    {
+      if (method != "GET")
+        throw new Error("Only GET requests are supported");
+      if (typeof async != "undefined" && !async)
+        throw new Error("Sync requests are not supported");
+      if (typeof user != "undefined" || typeof password != "undefined")
+        throw new Error("User authentification is not supported");
+
+      let match = /^data:[^,]+,/.exec(url);
+      if (match)
+      {
+        this._data = decodeURIComponent(url.substr(match[0].length));
+        return;
+      }
+
+      if (url.substr(0, this._host.length + 1) != this._host + "/")
+        throw new Error("Unexpected URL: " + url + " (URL starting with " + this._host + "expected)");
+
+      this._path = url.substr(this._host.length);
+
+      let queryIndex = this._path.indexOf("?");
+      this._queryString = "";
+      if (queryIndex >= 0)
+      {
+        this._queryString = this._path.substr(queryIndex + 1);
+        this._path = this._path.substr(0, queryIndex);
+      }
+    },
+
+    send: function(data)
+    {
+      if (!this._data && !this._path)
+        throw new Error("No request path set");
+      if (typeof data != "undefined" && data)
+        throw new Error("Sending data to server is not supported");
+
+      requests.push(Promise.resolve().then(() =>
+      {
+        let result = [Cr.NS_OK, 404, ""];
+        if (this._data)
+          result = [Cr.NS_OK, 0, this._data];
+        else if (this._path in XMLHttpRequest.requestHandlers)
+        {
+          result = XMLHttpRequest.requestHandlers[this._path]({
+            method: "GET",
+            path: this._path,
+            queryString: this._queryString
+          });
+        }
+
+        [this.channel.status, this.channel.responseStatus, this.responseText] = result;
+        this.status = this.channel.responseStatus;
+
+        let eventName = (this.channel.status == Cr.NS_OK ? "load" : "error");
+        let event = {type: eventName};
+        for (let handler of this["_" + eventName + "Handlers"])
+          handler.call(this, event);
+      }));
+    },
+
+    overrideMimeType: function(mime)
+    {
+    },
+
+    channel:
+    {
+      status: -1,
+      responseStatus: 0,
+      loadFlags: 0,
+      INHIBIT_CACHING: 0,
+      VALIDATE_ALWAYS: 0,
+      QueryInterface: () => this
+    }
+  };
+
+  XMLHttpRequest.requestHandlers = {};
+  this.registerHandler = (path, handler) =>
+  {
+    XMLHttpRequest.requestHandlers[path] = handler;
+  };
+
+  function waitForRequests()
+  {
+    if (requests.length)
+    {
+      let result = Promise.all(requests);
+      requests = [];
+      return result.catch(e =>
+      {
+        console.error(e);
+      }).then(() => waitForRequests());
+    }
+    else
+      return Promise.resolve();
+  }
+
+  function runScheduledTasks(maxMillis)
+  {
+    let endTime = currentTime + maxMillis;
+    if (fakeTimer.nextExecution < 0 || fakeTimer.nextExecution > endTime)
+    {
+      currentTime = endTime;
+      return Promise.resolve();
+    }
+    else
+    {
+      fakeTimer.trigger();
+      return waitForRequests().then(() => runScheduledTasks(endTime - currentTime));
+    }
+
+    currentTime = endTime;
+  }
+
+  this.runScheduledTasks = (maxHours, initial, skip) =>
+  {
+    if (typeof maxHours != "number")
+      throw new Error("Numerical parameter expected");
+    if (typeof initial != "number")
+      initial = 0;
+    if (typeof skip != "number")
+      skip = 0;
+
+    startTime = currentTime;
+    return Promise.resolve().then(() =>
+    {
+      if (initial >= 0)
+      {
+        maxHours -= initial;
+        return runScheduledTasks(initial * MILLIS_IN_HOUR);
+      }
+    }).then(() =>
+    {
+      if (skip >= 0)
+      {
+        maxHours -= skip;
+        currentTime += skip * MILLIS_IN_HOUR;
+      }
+      return runScheduledTasks(maxHours * MILLIS_IN_HOUR);
+    });
+  };
+
+  this.getTimeOffset = () => (currentTime - startTime) / MILLIS_IN_HOUR;
+  Object.defineProperty(this, "currentTime", {
+    get: () => currentTime
+  });
+
+  return {
+    Cc: {
+      "@mozilla.org/timer;1": {
+        createInstance: () => fakeTimer
+      }
+    },
+    Ci: {
+      nsITimer:
+      {
+        TYPE_ONE_SHOT: 0,
+        TYPE_REPEATING_SLACK: 1,
+        TYPE_REPEATING_PRECISE: 2
+      },
+      nsIHttpChannel: () => null,
+    },
+    Cr,
+    XMLHttpRequest,
+    Date: {
+      now: () => currentTime
+    }
+  };
+};
+
+exports.setupRandomResult = function()
+{
+  let randomResult = 0.5;
+  Object.defineProperty(this, "randomResult", {
+    get: () => randomResult,
+    set: value => randomResult = value
+  });
+
+  return {
+    Math: {
+      random: () => randomResult,
+      min: Math.min,
+      max: Math.max,
+      round: Math.round
+    }
+  };
+};
+
+exports.unexpectedError = function(error)
+{
+  console.error(error);
+  this.ok(false, "Unexpected error: " + error);
+};