Issue 4838 - Use nodeunit framework for integration tests running in browser

browsertests.js

Index: browsertests.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/browsertests.js
@@ -0,0 +1,228 @@
+/*
+ * 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";
+
+try
+{
+  var fs = require("fs");
+  var system = require("system");
+  var webpage = require("webpage");
+
+  var nodeunitUrl = system.args[1];
+  var urls = system.args.slice(2);
+
+  // No need to load anything, about:blank will do for us
+  var page = webpage.create();
+  page.evaluate(initPage, nodeunitUrl);
+  window.setTimeout(function()
+  {
+    runTests(urls, function()
+    {
+      phantom.exit();
+    });
+  }, 0);
+}
+catch(e)
+{
+  console.error(e);
+  phantom.exit();
+}
+
+function runTests(urls, callback)
+{
+  page.onError = function(msg, trace)
+  {
+    var message = "Error: " + msg + "\n";
+    if (trace)
+    {
+      for (var i = 0; i < trace.length; i++)
+      {
+        message += "\n  " + trace[i].file + ":" + trace[i].line +
+                   (trace[i].function ? " in function " + trace[i].function
+                                      : " in global code");
+      }
+    }
+    console.error(message);
+  };
+
+  page.onCallback = function(data)
+  {
+    function bold(str)
+    {
+      return "\u001B[1m" + str + "\u001B[22m";
+    }
+
+    function ok(str)
+    {
+      return "\u001B[32m" + str + "\u001B[39m";
+    }
+
+    function error(str)
+    {
+      return "\u001B[31m" + str + "\u001B[39m";
+    }
+
+    if (data.type == "moduleStart")
+      console.log(bold(data.name));
+    else if (data.type == "testDone")
+    {
+      if (data.failures.length == 0)
+        console.log("\u2714 " + data.name);
+      else
+      {
+        console.log(error("\u2716 " + data.name) + "\n");
+        data.failures.forEach(function(failure)
+        {
+          console.log(failure.join("\n") + "\n");
+        })
+      }
+    }
+    else if (data.type == "done")
+    {
+      if (data.failures)
+      {
+        console.log(
+          "\n" +
+          bold(error("FAILURES: ")) +
+          data.failures + "/" + data.assertions + " assertions failed"
+        );
+      }
+      else
+      {
+        console.log("\n" + bold(ok("OK: ")) + data.assertions + " assertions");
+      }
+
+      page.close();
+      callback();
+    }
+    else if (data.type == "log")
+    {
+      console.log(data.args.join(" "));
+    }
+    else if (data.type == "error")
+    {
+      console.error(data.args.join(" "));
+    }
+  };
+
+  page.evaluate(runTestsContent, urls);
+}
+
+function initPage(nodeunitUrl)
+{
+  function normalizeArgs(args)
+  {
+    var normalized = [];
+    for (var i = 0; i < args.length; i++)
+    {
+      try
+      {
+        if (typeof args[i] == "string")
+          normalized.push(args[i]);
+        else
+          normalized.push(JSON.stringify(args[i]));
+      }
+      catch (e)
+      {
+        normalized.push(String(args[i]));
+      }
+    }
+    return normalized;
+  }
+
+  window.console = {
+    log: function()
+    {
+      window.callPhantom({type: "log", args: normalizeArgs(arguments)});
+    },
+    error: function()
+    {
+      window.callPhantom({type: "error", args: normalizeArgs(arguments)});
+    }
+  };
+
+  window.loadScript = function(url, callback)
+  {
+    var script = document.createElement("script");
+    script.src = url;
+    script.async = false;
+    document.head.appendChild(script);
+    if (callback)
+      window.setTimeout(callback, 0);
+  };
+
+  loadScript(nodeunitUrl);
+}
+
+function runTestsContent(urls)
+{
+  var modules = {};
+
+  var loadNext = function()
+  {
+    if (urls.length)
+    {
+      window.exports = {};
+      window.module = {exports: window.exports};
+
+      var url = urls.shift();
+      var name = url.split("/").pop();
+      loadScript(url, function()
+      {
+        modules[name] = nodeunit.testCase(window.module.exports);
+        loadNext();
+      });
+    }
+    else
+    {
+      nodeunit.runModules(modules, {
+        moduleStart: function(name)
+        {
+          window.callPhantom({type: "moduleStart", name: name});
+        },
+        testDone: function(name, assertions)
+        {
+          var failures = assertions.filter(function(assertion)
+          {
+            return assertion.failed();
+          }).map(function(assertion)
+          {
+            return [String(assertion.error), assertion.error.stack];
+          });
+          window.callPhantom({
+            type: "testDone",
+            name: name,
+            failures: failures
+          });
+        },
+        done: function(assertions)
+        {
+          window.callPhantom({
+            type: "done",
+            assertions: assertions.length,
+            failures: assertions.filter(function(assertion)
+            {
+              return assertion.failed();
+            }).length
+          });
+        }
+      });
+    }
+  }
+  loadNext();
+}