How to use LocalLogs class of org.openqa.selenium.logging package

private void expectException(Runnable r, Class<?> clazz) { 
    try {
      r.run();
      fail("Expected: " + clazz.getSimpleName() + " but not thrown");
    } catch (Exception e) {
      if (!clazz.isInstance(e)) fail("Expected: " + clazz.getSimpleName() + " but " + e.getClass().getSimpleName() + " found", e);
    }
  }

    @Test(expectedException=IndexOutOfBoundsException.class) 
    public void  testFooThrowsIndexOutOfBoundsException() throws Exception {
         doThrow(IndexOutOfBoundsException.class).when(foo).doStuff();  
         try {
             foo.doStuff(); 
            } catch (IndexOutOfBoundsException e) {
                       assertEquals(IndexOutOfBoundsException .class, ex.getCause().getClass());
                      throw e;

               }

    }

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