Java ProviderTestCase子类的setUp()方法中的NPE
我当前在我的Java ProviderTestCase子类的setUp()方法中的NPE,java,android,testing,android-contentprovider,Java,Android,Testing,Android Contentprovider,我当前在我的ProviderTestCase2中有以下setUp()方法。在调用newResolverWithContentProviderFromSql()之后,它在Android API的深处抛出一个NPE。我做错了什么?我如何修复它 public void setUp() throws IllegalAccessException, InstantiationException { this.resolver = newResolverWithContentProviderFrom
ProviderTestCase2
中有以下setUp()
方法。在调用newResolverWithContentProviderFromSql()
之后,它在Android API的深处抛出一个NPE。我做错了什么?我如何修复它
public void setUp() throws IllegalAccessException, InstantiationException {
this.resolver = newResolverWithContentProviderFromSql(this.getMockContext(),
"test.", BaseballCardProvider.class,
BaseballCardContract.AUTHORITY,
BaseballCardSQLHelper.DATABASE_NAME,
BaseballCardSQLHelper.SCHEMA_VERSION, CREATE_TABLE
+ INSERT_DATA);
}
以下是供参考的堆栈跟踪:
java.lang.NullPointerException
at android.test.RenamingDelegatingContext.openOrCreateDatabase(RenamingDelegatingContext.java:146)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:215)
at android.database.DatabaseUtils.createDbFromSqlStatements(DatabaseUtils.java:1315)
at android.test.ProviderTestCase2.newResolverWithContentProviderFromSql(ProviderTestCase2.java:219)
at bbct.android.common.provider.test.BaseballCardProviderTest.setUp(BaseballCardProviderTest.java:44)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:190)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:175)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:555)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1584)
由于您已重写
setUp()
,但未调用super.setUp()
,因此测试用例未完成,原因如下:
此框架由基类“setUp()自动设置
方法。如果重写此方法,则必须按以下方式调用超级方法:
重写中的第一条语句
您是否正在覆盖
ProviderTestCase2
中的setUp()
?如果是这样的话,你应该调用super
。@A--C/facepalm谢谢