What would be a proper way of integration testing JavaScript interacting with local storage?

Question

After listening to the JavaScript Weekly podcast, where I heard about the jQueryLocalStorageTexteareas plugin, I decided to try to implement this myself.

What it basically does is save a textarea's content to the browser's local storage if supported by the browser.

My question is, how would I write this in a TDD style? How would the highest level test implementation look like? It should probably be something like

when I type foo in a text area
and I close the page
and I open it again
then the text area should contain foo

Is it worth using something like Selenium to implement these kind of tests? Or is there a better way to do it?

Answer 1

Use a testing framework built for the job, such as qUnit. jQuery-offline uses it to good effect to test caching of text using localStorage for browsers with and without native support.