这是我的代码：
@RunWith(MockitoJUnitRunner.class)
public class OrmLiteTest {
OrmLiteDatabaseHelper databaseHelper;
@Mock
Context mMockContext;
@Before
public void setup() {
mMockContext = Mockito.mock(Context.class);
databaseHelper = OpenHelperManager.getHelper(mMockContext,
OrmLiteDatabaseHelper.class);
}
运行测试时，出现以下异常：
java.lang.IllegalStateException: Could not construct instance of helper class class com.example.myapp.application.OrmLiteDatabaseHelper
at com.j256.ormlite.android.apptools.OpenHelperManager.constructHelper(OpenHelperManager.java:222)
at com.j256.ormlite.android.apptools.OpenHelperManager.loadHelper(OpenHelperManager.java:170)
at com.j256.ormlite.android.apptools.OpenHelperManager.getHelper(OpenHelperManager.java:78)
at com.bulatsa.despark.OrmLiteTest.setup(OrmLiteTest.java:39)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.mockito.internal.runners.JUnit45AndHigherRunnerImpl.run(JUnit45AndHigherRunnerImpl.java:37)
at org.mockito.runners.MockitoJUnitRunner.run(MockitoJUnitRunner.java:62)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.j256.ormlite.android.apptools.OpenHelperManager.constructHelper(OpenHelperManager.java:220)
... 31 more
Caused by: java.lang.NullPointerException
at com.j256.ormlite.android.apptools.OrmLiteSqliteOpenHelper.openFileId(OrmLiteSqliteOpenHelper.java:310)
at com.j256.ormlite.android.apptools.OrmLiteSqliteOpenHelper.<init>(OrmLiteSqliteOpenHelper.java:76)
at com.bulatsa.despark.application.OrmLiteDatabaseHelper.<init>(OrmLiteDatabaseHelper.java:28)
... 36 more
最佳答案
您正在尝试在OrmLiteSqliteOpenHelper.java，第310行中为空的对象上调用方法（或类似方法）
因为您没有共享该代码，所以我们只能说...
造成原因：java.lang.NullPointerException
在com.j256.ormlite.android.apptools.OrmLiteSqliteOpenHelper.openFileId（OrmLiteSqliteOpenHelper.java:310）
哦，那线...
mMockContext = Mockito.mock(Context.class);
...应删除，因为
@RunWith(MockitoJUnitRunner.class)已经在其中注入了一个模拟，无需手动创建一个。