运行时JUnit测试错误

Question

运行JUnit测试时出错

public class DamActionsTester 
{
    private DamActions damAction;
    private final Integer defualtRelease = 50;
    private final Integer damCapacity = 1053;
    private final Integer jobDuration = 14;
    private WaterLog log;

@Before
public void newDamAtctions() throws SimulationException
{
    damAction = new DamActions(damCapacity, defualtRelease, jobDuration, log);
}

在这里，JUnit测试说

java.lang.NullPointerException
    at asgn1Solution.DamActions.<init>(DamActions.java:37)
    at asgn1Solution.DamActionsTester.newDamAtctions(DamActionsTester.java:23)

有像这样的错误。这是我的部分错误

damLog.addEntry(damCapacity/2);

为此，如何修复它来运行它？

Answer 1

传递给构造函数时，接缝log为null：

private WaterLog log;

它永远不会被初始化，对吧？