xpath search for divs where the id contains specific text

Question

On my HTML page I have forty divs but I only want one div

Using agility pack to search and get all the divs with Ids I use this

"//div[@id]" 

BUT how do I search for divs with Ids where the id contains the text "test"

<div id="outerdivtest1></div>" 

Thanks

Answer 1

Use the contains function:

//div[contains(@id,'test')] 

Answer 2

I've used this with for the CSS class:

//div[@class = 'atom'] 

I assume it's similar with id's.