how to mock static enum parameter using powermock - unit-testing

Question

I am using powermock and meet two problems like this:
public LogUtils {
public static enum Type {
****
}
public void log(Type type, Date date) {
***
}
}
public class Service {
public int call() {
LogUtils.log(Type.T1, new Date());
***
return *;
}
}
#RunWith(PowerMockRunner.class)
public class TestService {
#Test
#PrepareForTest(LogUtils.class)
public void test() {
Service service = new Service();
PowerMockito.mockStatic(LogUtils.class);
LogUtils.log(Type.T1, new Date()); // test here, but failed.
service.
}
#Test
#PrepareForTest(LogUtils.class)
public void test2() {
Service service = new Service();
PowerMockito.mockStatic(LogUtils.class);
LogUtils.log(Type.T1, new Date());
int ret = service.call();
Assert.isTrue(1, ret);
}
}
For test1, it would throw Exception:
java.lang.VerifyError: Bad type on operand stack in arraylength
Exception Details:
Location:
LogUtilss$Type.values()[LogUtils$Type; #137: arraylength
Reason:
Invalid type: 'java/lang/Object' (current frame, stack[2])
Current Frame:
bci: #137
flags: { }
locals: { 'java/lang/Object', top, top, top, 'java/lang/Object' }
stack: { 'java/lang/Object', integer, 'java/lang/Object' }
it is caused by defining static enum in class instead of directly creating enum with single file. How to solve this problem as our codes almost define static enum in class?
For test2, if the first problem is solved, the direct call of LogUtils.log could be successfully skipped, but when call service.call(), couldn't skip.
Anyone could kindly help on this? Thanks a lot in advance.
I use powermock 1.6.5 and JDK1.7
Full code example:
public class LogUtils {
public static enum Type {
T(1),
D(2);
private int type;
Type(int type) {
type = type;
}
}
public static void log(Type t, String msg) {
System.out.println("skip this method");
}
}
public class TestAction {
public void test() {
String msg = "logMsg";
LogUtils.log(LogUtils.Type.T, msg);
}
}
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
#RunWith(PowerMockRunner.class)
public class UnitTest {
#Test
#PrepareForTest(LogUtils.class)
public void test() {
PowerMockito.mockStatic(LogUtils.class);
TestAction a = new TestAction();
LogUtils.log(LogUtils.Type.T, "test");
a.test();
}
}
Expect: no print for 'skip this method'.