### Question:
ConstraintViewXmlBean { public ConstraintGraphXmlBean getConstraintGraphXmlBean() { return constraintGraphXmlBean; }  ConstraintGraphXmlBean getConstraintGraphXmlBean(); void setConstraintGraphXmlBean(ConstraintGraphXmlBean constraintGraphXmlBean); ConstraintDataXmlBean getConstraintDataXmlBean(); void setConstraintDataXmlBean(ConstraintDataXmlBean constraintDataXmlBean);  }### Answer:
@Test public void testGetConstraintGraphXmlBean() throws Exception { classUnderTest.setConstraintGraphXmlBean(null); assertNull("aTestString", classUnderTest.getConstraintGraphXmlBean()); }