Re: Objects in Firefox

[Michael Bielski]

Turns out this actually does work and I had other problems with my tests.

[Michael Bielski]

More details: the error is happening because the object was created with default properties, all of which have a value of False. By doing it this way:

Object.defineProperty(window, 'sessionStorage', { value: mock,configurable:true,enumerable:true,writable:true });

The problem is solved. This was actually suggested in the comments to that issue. Sometimes it pays to read. This was also highlighted in this blog post:

http://webreflection.blogspot.com/2011/10/do-you-really-know-objectdefineproperty.html