Mine was leaking for a while, and like the smrt guy i am i ignored it for some time.
I eventually put it up on the hoist to have a closer look. I grabbed the strut just above the wheel and i could move it in and out several inches. I had constantly variable camber adjustment!
Like i said, it was totally blown and other then the noise (the clunk) i had no idea.
You could do the same check in your driveway with any floor jack.