我没有在Android应用程序上进行unitTesting。
的 TextChoiceAdapter.java:
public class TextChoiceAdapter extends ArrayAdapter<String> {
public Context context;
public int selectedPosition = -1; //Otherwise Android set zero then choice A will be selected automatically
public void choiceSelection(View rowView, int position){
if (selectedPosition == position)
rowView.setBackgroundColor(0xA0FF8000); // orange
else
rowView.setBackgroundColor(Color.TRANSPARENT);
}
public TextChoiceAdapter(Context context,int resources, List<String> textChoiceList) {
super(context, resources, textChoiceList);
this.context = context;
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
...
}
}
TextChoiceAdapterTest.java:
public class TextChoiceAdapterTest{
private TextChoiceAdapter textChoiceAdapter;
private ArrayList<String> textChoiceList;
@Before
public void setUp(){
textChoiceList = new ArrayList<>();
textChoiceList.add("North");
textChoiceList.add("East");
textChoiceList.add("West");
textChoiceList.add("South");
Context context = mock(Context.class);
textChoiceAdapter = new TextChoiceAdapter(context, 1, textChoiceList);
}
@Test
public void testChoiceSelection(){
//https://stackoverflow.com/questions/10217793/mockito-how-to-stub-getter-setter
textChoiceAdapter.selectedPosition = 1;
Context context = mock(Context.class);
//Try my own object class.
class mockRowView extends View{
int backgroundColor;
public mockRowView(Context context){
super(context);
}
public void setBAckgroundColor(int a){
this.backgroundColor = a;
}
public int getBackgroundColor(){
return this.backgroundColor;
}
}
View rowView = mock(mockRowView.class);
textChoiceAdapter.choiceSelection(rowView, 1);
assertEquals(rowView.getBackgroundColor(), 0xA0FF8000);
}
}
错误:
java.lang.AssertionError:
Expected :null
Actual :-1593868288
我的问题:
如何mock
我的rowView
setter()
和getter()
正确?
我想从不同的输入中得到不同的答案。
答案 0 :(得分:1)
感谢您对Ferrybig和Boris van Katwijk的关注。从现在开始,我会听从你的建议
1.创建MockRowView
班级
嘲笑那个班级
3.使用setter
方法。 doCallRealMethod()
4.使用直接访问变量。由于第二次调用它将返回0。
@Test
public void testChoiceSelection(){
textChoiceAdapter.selectedPosition = 1;
Context context = mock(Context.class);
//Try my own object class.
class MockRowView extends View{
int backgroundColor;
public MockRowView(Context context){
super(context);
}
@Override
public void setBackgroundColor(int a){
this.backgroundColor = a;
}
//User direct access will not cause a problem when do assertEquals()
}
MockRowView rowView = mock(MockRowView.class);
doCallRealMethod().when(rowView).setBackgroundColor(anyInt());
textChoiceAdapter.selectedPosition = 2;
textChoiceAdapter.choiceSelection(rowView, 1);
assertEquals(rowView.backgroundColor, Color.TRANSPARENT);
textChoiceAdapter.choiceSelection(rowView, 2);
assertEquals(rowView.backgroundColor, 0xA0FF8000);
}
答案 1 :(得分:0)
一个小但重要的注意事项是assertEquals
中的参数被交换。第一个参数应该是你所期望的,第二个是你实际得到的。
因此,错误消息实际上表明您已成功模拟了rowView
对象。当您调用getBackgroundColor()
时,您获得了null
,这就是模拟对象的作用。
您可以使用Mockito的when
机制为模拟对象指定方法的行为:
Mockito.when(rowView.getBackgroundColor()).thenReturn(42);
但是,我觉得你实际上依赖于rowView对象的自然功能。您可能不想模拟此对象,而是使用自然创建的实例。如果需要,您可以模拟此对象的依赖项。在测试断言中调用模拟对象的方法没有多大意义。