@Test
public void testResizable() {

    //sanity assert
    assertTrue("min < max", columnExt.getMinWidth() < columnExt.getMaxWidth());
    // sanity assert
    assertTrue("resizable default", columnExt.getResizable());
    columnExt.setMinWidth(columnExt.getMaxWidth());
    assertFalse("must not be resizable with equal min-max", columnExt.getResizable());
    TableColumnExt copy = new TableColumnExt(columnExt);
    // sanity
    assertEquals("min-max of clone", copy.getMinWidth(), copy.getMaxWidth());
    assertFalse("must not be resizable with equal min-max", copy.getResizable());
    copy.setMinWidth(0);
    //sanity assert
    assertTrue("min < max", copy.getMinWidth() < copy.getMaxWidth());
    assertTrue("cloned base resizable", copy.getResizable());
}