can any one explain me about metrics,
what is the purpose of metrics?
how metrics related to testing?
My suggestion is that you run a search on all the forums here and you'll find hundreds of posts related to metrics.
Life should NOT be a trip to the grave with the intention of arriving safely in an cool and well preserved body, but rather to skid in, chocolate in one hand, beer in the other, body wrecked, totally worn out and screaming WOO HOO what a ride!