### Question:
BotsingActualControlFlowGraph extends ActualControlFlowGraph { @Override protected void setEntryPoint(BytecodeInstruction entryPoint) { if (entryPoint == null) { throw new IllegalArgumentException("The given entryPoint is null"); } this.entryPoint = entryPoint; } BotsingActualControlFlowGraph(RawControlFlowGraph rawGraph);   }### Answer:
@Test public void testSetEntryPoint(){ RawControlFlowGraph realRCFG = new BotsingRawControlFlowGraph(BotsingTestGenerationContext.getInstance().getClassLoaderForSUT(),"testClass","testMethod",0); RawControlFlowGraph rcfg = Mockito.spy(realRCFG); try{ BotsingActualControlFlowGraph actualControlFlowGraph = new BotsingActualControlFlowGraph(rcfg); }catch(IllegalArgumentException e){ assertTrue(e.getMessage().contains("The given entryPoint is null")); } BytecodeInstruction stmnt1 = testingUtils.mockNewStatement(className,"sum()"); Mockito.doReturn(stmnt1).when(rcfg).determineEntryPoint(); Mockito.doReturn(null).when(rcfg).determineExitPoints(); try{ BotsingActualControlFlowGraph actualControlFlowGraph = new BotsingActualControlFlowGraph(rcfg); }catch(IllegalArgumentException e){ assertTrue(e.getMessage().contains("The given exitPoints set is null")); } Set<BytecodeInstruction> exitpoints = new HashSet<>(); BytecodeInstruction stmnt2 = testingUtils.mockNewStatement(className,"sum()"); exitpoints.add(stmnt2); Mockito.doReturn(exitpoints).when(rcfg).determineExitPoints(); try{ BotsingActualControlFlowGraph actualControlFlowGraph = new BotsingActualControlFlowGraph(rcfg); }catch(IllegalArgumentException e){ assertTrue(e.getMessage().contains("unexpected exitPoint byteCode instruction type:")); } Mockito.doReturn(true).when(stmnt2).canBeExitPoint(); rcfg.addVertex(stmnt1); rcfg.addVertex(stmnt2); Mockito.doReturn(null).when(rcfg).determineBranches(); Mockito.doReturn(null).when(rcfg).determineJoins(); try{ BotsingActualControlFlowGraph actualControlFlowGraph = new BotsingActualControlFlowGraph(rcfg); }catch(IllegalArgumentException e){ assertTrue(e.getMessage().contains("The given branches set is null")); } Mockito.doReturn(exitpoints).when(rcfg).determineBranches(); try{ BotsingActualControlFlowGraph actualControlFlowGraph = new BotsingActualControlFlowGraph(rcfg); }catch(IllegalArgumentException e){ assertTrue(e.getMessage().contains("The given joins set is null")); } Mockito.doReturn(exitpoints).when(rcfg).determineJoins(); try{ BotsingActualControlFlowGraph actualControlFlowGraph = new BotsingActualControlFlowGraph(rcfg); }catch(Exception e){ } }