Mockito @mock不使用构造函数注入正确注入命名模拟

Question

我试图使用@mock将两个不同的对象注入我的类正在测试的类中。我需要它们是两个不同的对象，以便我可以在每个对象上使用when来产生不同的结果。我搜索过的所有内容，因此指向此工作，但是在下面运行测试时 - 两个对象都是相同的模拟。

import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.when;
import com.ihm.pp.test.UnitTest;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnitRunner;
/**
 * @author Josh Johnston
 */
@Category(UnitTest.class)
@RunWith(MockitoJUnitRunner.class)
public class ConstructorInjectionBug {
  @Mock
  private IBroken aBroken;
  @Mock
  private IBroken bBroken;
  @InjectMocks
  private UsesBroken usesBroken;
  @Test
  public void testBrokenConstructorInjection() {
    when(bBroken.getNumber()).thenReturn(2);
    assertEquals(2, usesBroken.getbBroken().getNumber());
    when(aBroken.getNumber()).thenReturn(1);
    assertEquals(1, usesBroken.getaBroken().getNumber());
  }
}
interface IBroken {
  int getNumber();
}
class UsesBroken {
  private IBroken aBroken;
  private IBroken bBroken;
  public UsesBroken(IBroken aBroken, IBroken bBroken) {
    this.aBroken = aBroken;
    this.bBroken = bBroken;
  }
  public IBroken getaBroken() {
    return aBroken;
  }
  public IBroken getbBroken() {
    return bBroken;
  }
}

结果：

java.lang.AssertionError:
    Expected :1
    Actual   :2
at org.junit.Assert.failNotEquals(Assert.java:834)
    at org.junit.Assert.assertEquals(Assert.java:645)
    at org.junit.Assert.assertEquals(Assert.java:631)
    at ConstructorInjectionBug.testBrokenConstructorInjection(ConstructorInjectionBug.java:37)

Answer 1

@InjectMocks不知道要注入哪种IBroken。因此，这并不是它被打破了，而是设计有缺陷。

您需要将模拟物明确注入正在测试的主题中以获得所需的行为。

@Category(UnitTest.class)
@RunWith(MockitoJUnitRunner.class)
public class ConstructorInjectionBug {
  @Mock
  private IBroken aBroken;
  @Mock
  private IBroken bBroken;
  private UsesBroken usesBroken;
  @Test
  public void testBrokenConstructorInjection() {
    //Arrange
    usesBroken = new UsesBroken(aBroken, bBroken);
    when(bBroken.getNumber()).thenReturn(2);
    when(aBroken.getNumber()).thenReturn(1);
    //Act & Assert
    assertEquals(2, usesBroken.getbBroken().getNumber());    
    assertEquals(1, usesBroken.getaBroken().getNumber());
  }
}