Testing 使用Runnable的EasyMock测试无效

我正在尝试测试以下类（我省略了实现）

这是我使用它的方式：

UTRI.runAsUser("User1", new Runnable () {
    private void run() {
    //do whatever needs to be done here.

    }
});

问题是，我不知道如何使用EasyMock测试返回void的函数。这一点我也不太熟悉一般的考试（刚毕业的时候！）。有人能帮我解释一下我需要做什么来达到这个目的吗？我在考虑让UTRI成为一个模拟，并在那之后进行expectlastcall，但现实地说，不确定

public class UTRITest {

    UTRI utri = new UTRI();

    @Test
    public void testRunAsUser() {
        // Create Mocks
        Runnable mockRunnable = EasyMock.createMock(Runnable.class);

        // Set Expectations
        **mockRunnable.run();
        EasyMock.expectLastCall().once();**

        EasyMock.replay(mockRunnable);
        // Call the method under test
        utri.runAsUser("RAMBO", **mockRunnable**);

        // Verify if run was called on Runnable!!
        EasyMock.verify(mockRunnable);
    }    
}

public class UTRITest {

    UTRI utri = new UTRI();

    @Test
    public void testRunAsUser() {
        // Create Mocks
        Runnable mockRunnable = EasyMock.createMock(Runnable.class);

        // Set Expectations
        **mockRunnable.run();
        EasyMock.expectLastCall().once();**

        EasyMock.replay(mockRunnable);
        // Call the method under test
        utri.runAsUser("RAMBO", **mockRunnable**);

        // Verify if run was called on Runnable!!
        EasyMock.verify(mockRunnable);
    }    
}