我有一个Activity从方法中的Application扩展类(应用程序上下文)中提取对象OnCreate().
单元测试此活动时,所需的对象不存在,因为它是从前一个Activity填充并存储在上述应用程序上下文中.
不用说,当我getActivity()从ActivityInstrumentationTestCase2扩展测试用例中调用时,我得到一个空指针异常.
如何在活动开始之前填充上下文并使其可用Activity？
更新:
经过一些挖掘后我发现:this.getInstrumentation().getTargetContext()然后将其转换为Application扩展类的类型.但我得到一个类强制转换异常,跟踪指向这个:
04-04 21:02:27.036: INFO/TestRunner(431): started: testIt(edu.rockies.rockies.activity.courses.test.TopicTest)
04-04 21:02:27.126: INFO/TestRunner(431): failed: testIt(edu.rockies.rockies.activity.courses.test.TopicTest)
04-04 21:02:27.126: INFO/TestRunner(431): ----- begin exception -----
04-04 21:02:27.136: INFO/TestRunner(431): java.lang.ClassCastException: android.app.ApplicationContext
04-04 21:02:27.136: INFO/TestRunner(431): at edu.rockies.rockies.activity.courses.test.TopicTest.setUp(TopicTest.java:27)
04-04 21:02:27.136: INFO/TestRunner(431): at junit.framework.TestCase.runBare(TestCase.java:125)
04-04 21:02:27.136: INFO/TestRunner(431): at junit.framework.TestResult$1.protect(TestResult.java:106)
04-04 21:02:27.136: INFO/TestRunner(431): at junit.framework.TestResult.runProtected(TestResult.java:124)
04-04 21:02:27.136: INFO/TestRunner(431): at junit.framework.TestResult.run(TestResult.java:109)
04-04 21:02:27.136: INFO/TestRunner(431): at junit.framework.TestCase.run(TestCase.java:118)
04-04 21:02:27.136: INFO/TestRunner(431): at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169)
04-04 …