Issue 4023 - Move storage of subscription lists to localStorage

qunit/tests/io.js

Index: qunit/tests/io.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/qunit/tests/io.js
@@ -0,0 +1,80 @@
+ /* 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/>.
+ */
+
+
+(function()
+{
+  var IO = require("io").IO;

[kzar, 2016/08/22 15:38:33]

You're requiring the same module twice here, I don't see why.

[Oleksandr, 2016/08/31 21:54:36]

Done.

+  var io = require("io");    
+  module("IO validation");
+
+  test("Test writing entry larger than 1Mb but smaller than 5Mb", function(assert)

[kzar, 2016/08/22 15:38:33]

Nit: If we're just supporting Edge anyway I guess we could use fancy stuff like
arrow notation here? (Would also avoid the line being too long that way.)

[Oleksandr, 2016/08/31 21:54:36]

Done.

+  {
+      var testDataOver1Mb = new Array(30000);
+      testReadWrite(testDataOver1Mb, "testFile1Mb", assert);
+      expect(2);
+  });
+
+  test("Test writing entry larger than 5Mb", function(assert)
+  {
+      var testDataOver5Mb = new Array(300000);

[kzar, 2016/08/22 15:38:33]

Indentation seems wrong, should be two spaces.

[Oleksandr, 2016/08/31 21:54:36]

Done.

+      testReadWrite(testDataOver5Mb, "testFile5Mb", assert);
+      expect(2);
+  });
+
+  function DummyParser()
+  {
+      readData = new Array();
+  };
+  DummyParser.prototype = 
+  {
+      readData: new Array(),

[kzar, 2016/08/22 15:38:33]

Why not array literal? (Same elsewhere.)

[Oleksandr, 2016/08/31 21:54:36]

Done.

+      process: function (line) {
+          this.readData.push(line);
+      }
+  };
+
+  function testReadWrite(data, fileName, assert)

[kzar, 2016/08/22 15:38:33]

Please put the testReadWrite function above where it's first used.

+  {
+      // For debugging purposes clear the storage

[kzar, 2016/08/22 15:38:32]

Will this trash the user's saved filters? Also this won't be called at the end
of the last test so I guess junk will be left in storage after running the
tests? Is it possible to use setUp / tearDown functions instead of putting that
stuff here?

[Oleksandr, 2016/08/31 21:54:36]

This was just a comment I forgot to remove. The code for clearing storage wasn't
here. I have added afterEach method per your suggestion.

+      var fileWritten = assert.async();
+      for (var index = 0; index < data.length; index++) {
+          data[index] = "test string " + index;
+      }
+      IO.writeToFile(IO.resolveFilePath(fileName), data, 
+                     function() { });
+      setTimeout(function() 
+      { 
+        fileWritten();
+
+        var fileRead = assert.async();
+        var dummyParser = new DummyParser();
+        dummyParser.readData = [];
+        IO.readFromFile(IO.resolveFilePath(fileName), 

[kzar, 2016/08/22 15:38:33]

Nit: Mind indenting this like so?

IO.readFromFile(
  IO.resolveFilePath(fileName), 
  function()
  {
    ...
  }
);

That way you'll avoid having some lines that are too long.

[Oleksandr, 2016/08/31 21:54:36]

Done.

+                        dummyParser, 
+                        function() 
+                        { 
+                            equal(dummyParser.readData.length, data.length, 
+                            "Check if read entry is the same size as written");
+                            equal(dummyParser.readData[20000], data[20000], 
+                            "Check if read entry element is the same as written");
+                            fileRead(); 
+                        });
+          
+      }, 
+      1000);
+      
+  }
+})();