Was he tested?
Oh please, thats an old tired argument, and one which never works....because someone accepts evolution and also rejects God, does not mean that the same holds true for anyone else...for each person who supports evolution and has no belief in God, there is another person who supports evolution and does believe in God...belief in one thing does not necessarily mean that a person will reject something else...it does not work like that...
At least you are not trying to argue that 'Darwin recanted' his Theory of Evolution...many creationists and IDers still try to sell that story on these threads...
So you say that evolution lead Darwin to become an atheist, and others say no, Darwin recanted and became a Christian again...now, which story is it?