-- b-rename --
testy.go:
package testy

type tt int //@rename("tt", "testyType")

func b() {
}

testy_test.go:
package testy

import "testing"

func TestSomething(t *testing.T) {
	var x int //@rename("x", "testyX")
	b()       //@rename("a", "b")
}

-- testyX-rename --
testy_test.go:
package testy

import "testing"

func TestSomething(t *testing.T) {
	var testyX int //@rename("x", "testyX")
	a()       //@rename("a", "b")
}