There is no test for genital warts, nor is there a test for hpv, the virus that causes genital warts. Also, I have heard that they no longer swab the inside of men's urethras for sti tests. I hear they test urine samples and/or blood samples.
Go to the doctor. The doctor can recognize genital warts just by looking at them. You should have them treated or they will spread and get larger. Doctors see it all the time. They are extremely common, and basically harmless.
Also, condoms don't prevent transmission of .H.P.V.
For women, certain strains of .H.P.V increase the likelihood of developing cervical cancer but the strains that cause genital warts are different from the strains that are linked to cancer. H.P.V's only effect on men is genital warts - no increased risk of cancer.