There really is no one "Theory of Evolution." The "theory" is made up of several closely-related theories and these are what are being tested. Of course, results in any one of them reinforce or detract from the others. Biologists, anatomists, psychologists, zoologists, geneticists, botanists, paleontologists, anthropologists, whatnot all work from one or more theories of evolution and test against those. Of course, we are speaking mostly of the theory used by biologists (a change in allele frequency over time), but empirical evidence has been gathering for some time that this particular theory is right on the button. Still, biologists are out there testing day after day. One day, they may find something to replace the theory with, and this may or may not have repurcussions in the other scientific disciplines mentioned above, but until that day "evolution" is the best explanation going.
My point is that "one day" will not arrive until those who control funding and publishing allow people to question evolution without being called kooks, removed from graduate programs and stripped of funding.