我目前在setUp()
中使用了以下ProviderTestCase2
方法。在调用newResolverWithContentProviderFromSql()
后,它会在Android API内部抛出一个NPE。我做错了什么,如何解决?
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);
}
这是堆栈跟踪供参考:
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)
答案 0 :(得分:2)
由于您已覆盖setUp()
但未调用super.setUp()
,因此TestCase未完成,因为documentation表示:
此框架由基类'setUp()自动设置 方法。如果重写此方法,则必须将super方法调用为 覆盖中的第一个语句。