Unit test compare value return from text() with toEqual()?

How to compare part of returns value from text() function which present in the unit test. For example I have angular application there is element . I want to test it thus that element is present and src attr has value "img.jpg".

Hope, I expressed my question correct.

Over there code:

Html markup:
     <img src="img.jpg"/>

Unit test:
it('must has image', function(){
var img = directiveElem.find('<img src="img.jpg">');
expect(img).toBeDefined();
expect(img.find('src="img.jpg"').text()).toEqual('img.jpg');

})