Android 从其他类运行runTestOnUiThread

在我们当前的框架中，我们有一个扩展ActivityInstrumentationTestCase2 | Android开发者的基类。通常，当我们编写测试用例类时，我们会继承这个基类（我们称之为FooBase）并编写我们的方法。正如您所想象的，这变得越来越大，我想对它进行重构，以便对于我们正在测试的功能的每个区域，它都在自己的类中，以便我们可以重用它。希望我的vague类足够准确，目标只是能够将方法拆分为不同的类，并从我的测试用例中调用它们

 public class FooBase extends ActivityInstrumentionTestCase2 {
    @Override
 public void runTestOnUiThread(Runnable runnable) {
    try {
        super.runTestOnUiThread(runnable);
    } catch (InterruptedException e) {
        throw RuntimeInterruptedException.rethrow(e);
    } catch (RuntimeException e) {
        throw e;
    } catch (Error e) {
        throw e;
    } catch (Throwable e) {
        throw new RuntimeException(e);
    }
 }
 } 

我们的测试是

public class TestFooBase extends FooBase{
      public void testfeature(){
               //execute a method that uses super.runTestOnUiThread()
      }

 }

我是如何尝试重构它的

 public class FooHelper extends FooBase{
     public FooHelper(Activity activity){
         setActivity(activity)
     }
     public void sameMethod(){
         //moved the method in FooBase to this class that uses the runTestOnUiThread
     }

}

我的新测试用例看起来像这样

public class TestFooBase extends FooBase{
      FooHelper fooHelper;
      public void setup(){
              fooHelper = new FooHelper(getActivity);
      }
      public void testfeature(){
               //execute a method that uses super.runTestOnUiThread()
               fooHelper.callthemethod()
      }

 }

---

执行此命令时，super.runTestOnUIThread上会出现一个空指针

您可以通过整个测试类并为其设置构造函数

public class BaseTestCase {
    private Instrumentation instrumentation;
    private InstrumentationTestCase instrumentationTestCase;

    public BaseTestCase(InstrumentationTestCase testClass, Instrumentation instrumentation){
        this.instrumentationTestCase = testClass;
        this.instrumentation = instrumentation;
}

    public Activity getCurrentActivity() {
        try {
            instrumentationTestCase.runTestOnUiThread(new Runnable() {
                @Override
                public void run() {
                   //Code
                }
            });
        } catch (Throwable throwable) {
            throwable.printStackTrace();
        }
        return activity;

}

要使用，您需要在setUp方法上实例化BaseTestCase类

public class ActivityTest extends ActivityInstrumentationTestCase2<TestActivity.class>{
    private BaseTestCase baseTestCase;
    @Override
    public void setUp() throws Exception { 
        super.setUp();
        getActivity();
        baseTestCase = new BaseTestCase(this, getInstrumentation());
    }
}

public void testRun(){
    baseTestCase.getCurrentActivity();
}