Taxotere and Taxol questions

Hi, everyone. I'm new here, and have a few questions about Taxotere and Taxol.

Are there any tests out there that assess the effectiveness of Taxotere or Taxol on a tumor? I know that the two drugs keep cells from dividing, and I've read that the presence of too much class III beta tubulin in cancer cells is supposed to be a good indicator for resistance to the two drugs. Is there a test (like the hormone receptor test) that can identify if a tumor has too much class III beta tubulin before chemo?

Thanks in advance to everyone for your help.