// dependency, and at the moment we don't try to instrument it
		// for coverage. There isn't any technical reason why
		// *_test.go files couldn't be instrumented, but it probably
		// doesn't make much sense to lump together coverage metrics
		// (ex: percent stmts covered) of *_test.go files with
		// non-test Go code.
		if len(p.GoFiles)+len(p.CgoFiles) == 0 {
			continue
		}