ArrayList中的Mockito LT＆;串GT;问题 [英] mockito ArrayList<String> problem

问题描述

我有我试图单元测试的方法。此方法需要一个参数作为一个ArrayList和做事吧。我想定义模拟是：

I have a method that I am trying to unit test. This method takes a parameter as an ArrayList and does things with it. The mock I am trying to define is:

ArrayList<String> mocked = mock(ArrayList.class);

这给[选中]未检查的转换的警告。

which gives a [unchecked] unchecked conversion" warning.

ArrayList<String> mocked = mock(ArrayList<String>.class);

给我一个错误。

gives me an error.

有人在乎赐教，以什么我做错了？

Anyone care to enlighten me as to what I am doing wrong?

推荐答案

另一种方法是使用@Mock注解从那时起可以的Mockito使用的反射式寻找它的通用类型：

The alternative is to use the @Mock annotation since then Mockito can use type reflection to find the generic type:

public class MyTest {

  @Mock
  private ArrayList<String> mockArrayList;

  ...

  public void setUp() {
    MockitoAnnotations.initMocks(this);
  }

  public void testMyTest() {
    when(mockArrayList.get(0)).thenReturn("Hello world");

    String result = mockArrayList.get(0);

    assertEquals("Should have the correct string", "Hello world", result);

    verify(mockArrayList).get(0);
  }
}

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