Fix sorting of sizes on the statistics views by sorting raw values and prettifying on the client side. Includes Jasmine tests for the prettyfying function. Fixes #2315

web/pgadmin/static/js/size_prettify.js

@@ -0,0 +1,24 @@
+define([],
+  function () {
+    var sizePrettify = function (rawSize) {
+      var size = Math.abs(rawSize),
+          limit = 10 * 1024,
+          limit2 = limit - 1,
+          cnt = 0,
+          sizeUnits = ['bytes', 'kB', 'MB', 'GB', 'TB', 'PB'];
+
+      if (size < limit)
+        return size + ' ' + sizeUnits[cnt]; // return in bytes format
+      else
+      {
+        do {
+          size = size / 1024;
+          cnt += 1;
+        } while (size > limit2);
+
+        return Math.round(size) + ' ' + sizeUnits[cnt];
+      }
+    };
+
+  return sizePrettify;
+});