Issue 6391 - Allow running the browser unit tests with Firefox

test/runners/download.js

Index: test/runners/download.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/test/runners/download.js
@@ -0,0 +1,82 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-present 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/>.
+ */
+
+/* eslint-env node */
+
+"use strict";
+
+const fs = require("fs");
+const https = require("https");
+const path = require("path");
+
+const extractZip = require("extract-zip");
+
+function download(url, destFile)
+{
+  return new Promise((resolve, reject) =>
+  {
+    let cacheDir = path.dirname(destFile);
+    if (!fs.existsSync(cacheDir))
+      fs.mkdirSync(cacheDir);
+    let tempDest = destFile + "-" + process.pid;
+    let writable = fs.createWriteStream(tempDest);
+
+    https.get(url, response =>
+    {
+      if (response.statusCode != 200)
+      {
+        reject(
+          new Error(`Unexpected server response: ${response.statusCode}`));
+        response.resume();
+        return;
+      }
+
+      response.pipe(writable)
+              .on("error", error =>
+              {
+                writable.close();
+                fs.unlinkSync(tempDest);
+                reject(error);
+              })
+              .on("close", () =>
+              {
+                writable.close();
+                fs.renameSync(tempDest, destFile);
+                resolve();
+              });
+    }).on("error", reject);
+  });
+}
+
+function unzipArchive(archive, destDir)
+{
+  return new Promise((resolve, reject) =>
+  {
+    extractZip(archive, {dir: destDir}, err =>
+    {
+      if (err)
+        reject(err);
+      else
+        resolve();
+    });
+  });
+}
+
+module.exports = {
+  download,
+  unzipArchive
+};