关于 Robolectric.When 我在 activity 中没有初始化对象，我该如何测试 activity？

Question

当我这样写的时候 MyActivity activity = Robolectric.setupActivity(MyActivity.class);

它总是这样抛出：

java.lang.NullPointerException
    at com.printer.ui.activity.MyActivity.initView(MyActivity.java:309)
    at com.ui.activity.MyActivity.onCreate(MyActivity.java:114)

那一行是这样的：

fileTextView.setText(AppUtil.getFileNameNoEx(AppConfig.printFile.getName()));

而AppConfig.printFile为空，我如何测试activity？

Answer 1

快速修复您的测试：

AppConfig.printFile = new File();
MyActivity activity = Robolectric.setupActivity(MyActivity.class);

正确的解决方法是传递 activity 意图中的路径：

public class MyActivity {
   public static final String FILE_PATH = "FILE_PATH";

   public void onCreate(Bundle bundle) {
      super.onCreate(bundle);

      String path = getIntent().getStringExtra(FILE_PATH);
      ...
   } 
   ...
}

Intent myActivityIntent = new Intent(this, MyActivity.class);
intent.putExtra(MyActivity.FILE_PATH, "path");
startActivity(intent);

也尽量避免静电干扰http://www.endran.nl/blog/death-to-statics/

关于 Robolectric.When 我在 activity 中没有初始化对象，我该如何测试 activity？

About Robolectric.When I have object not init in an activity, how can I test that activity?

android

robolectric

android-testing