@Test
public void testGetBooleanWithFalseValue() {

    System.setProperty("key", "false");
    assertFalse(SystemPropertyUtil.getBoolean("key", true));
    System.setProperty("key", "no");
    assertFalse(SystemPropertyUtil.getBoolean("key", false));
    System.setProperty("key", "0");
    assertFalse(SystemPropertyUtil.getBoolean("key", true));
}