### Question:
CallActivityPropertyWriter extends MultipleInstanceActivityPropertyWriter { public void setSlaDueDate(SLADueDate slaDueDate) { CustomElement.slaDueDate.of(flowElement).set(slaDueDate.getValue()); } CallActivityPropertyWriter(CallActivity activity, VariableScope variableScope, Set<DataObject> dataObjects); void setOnEntryAction(OnEntryAction onEntryAction); void setOnExitAction(OnExitAction onExitAction); void setIndependent(Boolean independent); void setAbortParent(Boolean abortParent); void setWaitForCompletion(Boolean waitForCompletion); void setAsync(Boolean async); void setCalledElement(String value); void setCase(Boolean isCase); void setAdHocAutostart(boolean autoStart); void setSlaDueDate(SLADueDate slaDueDate);  }### Answer:
@Test public void testSetSlaDueDate() { String slaDueDate = "12/25/1983"; tested.setSlaDueDate(new SLADueDate(slaDueDate)); assertTrue(CustomElement.slaDueDate.of(tested.getFlowElement()).get().contains(slaDueDate)); }