我有一个方法调用,我想用mockito模拟。首先,我已经创建并注入了一个对象的实例,该方法将在其上被调用。我的目的是验证方法调用中的一个对象。

是否有一种方法,mockito允许您断言或验证对象和它的属性时,mock方法被调用?

例子

Mockito.verify(mockedObject)
       .someMethodOnMockedObject(
              Mockito.<SomeObjectAsArgument>anyObject())

而不是做anyObject()我想检查参数对象包含一些特定的字段

Mockito.verify(mockedObject)
       .someMethodOnMockedObject(
              Mockito.<SomeObjectAsArgument>**compareWithThisObject()**)

当前回答

另一个简单的方法是:

import org.mockito.BDDMockito;    
import static org.mockito.Matchers.argThat;
import org.mockito.ArgumentMatcher;

BDDMockito.verify(mockedObject)
        .someMethodOnMockedObject(argThat(new ArgumentMatcher<TypeOfMethodArg>() {

            @Override
            public boolean matches(Object argument) {
                final TypeOfMethodArg castedArg = (TypeOfMethodArg) argument;

                // Make your verifications and return a boolean to say if it matches or not
                boolean isArgMarching = true;

                return isArgMarching;
            }
        }));

其他回答

这是基于iraSenthil的答案,但带有注释(Captor)。在我看来,它有一些优点:

它是短的 这样更容易阅读 它可以无警告地处理泛型

例子:

@RunWith(MockitoJUnitRunner.class)
public class SomeTest{

    @Captor
    private ArgumentCaptor<List<SomeType>> captor;

    //...

    @Test 
    public void shouldTestArgsVals() {
        //...
        verify(mockedObject).someMethodOnMockedObject(captor.capture());

        assertThat(captor.getValue().getXXX(), is("expected"));
    }
}

以上的解决方案在我的案例中并不适用。我不能使用ArgumentCaptor方法被调用了几次,我需要验证每一个。一个简单的使用“argThat”的Matcher很容易做到这一点。

定制的匹配器

// custom matcher
private class PolygonMatcher extends ArgumentMatcher<PolygonOptions> {
    private int fillColor;
    public PolygonMatcher(int fillColor) {
        this.fillColor = fillColor;
    }

    @Override
    public boolean matches(Object argument) {
        if (!(argument instanceof PolygonOptions)) return false;
        PolygonOptions arg = (PolygonOptions)argument;
        return Color.red(arg.getFillColor()) == Color.red(fillColor)
                && Color.green(arg.getFillColor()) == Color.green(fillColor)
                && Color.blue(arg.getFillColor()) == Color.blue(fillColor);
    }
}

测试运行器

// do setup work setup
// 3 light green polygons
int green = getContext().getResources().getColor(R.color.dmb_rx_bucket1);
verify(map, times(3)).addPolygon(argThat(new PolygonMatcher(green)));

// 1 medium yellow polygons
int yellow = getContext().getResources().getColor(R.color.dmb_rx_bucket4);
    verify(map, times(1)).addPolygon(argThat(new PolygonMatcher(yellow)));

// 3 red polygons
int orange = getContext().getResources().getColor(R.color.dmb_rx_bucket5);
verify(map, times(3)).addPolygon(argThat(new PolygonMatcher(orange)));

// 2 red polygons
int red = getContext().getResources().getColor(R.color.dmb_rx_bucket7);
verify(map, times(2)).addPolygon(argThat(new PolygonMatcher(red)));

如果使用Java 8,可以使用Lambda表达式进行匹配。

import java.util.Optional;
import java.util.function.Predicate;

import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;

public class LambdaMatcher<T> extends BaseMatcher<T>
{
    private final Predicate<T> matcher;
    private final Optional<String> description;

    public LambdaMatcher(Predicate<T> matcher)
    {
        this(matcher, null);
    }

    public LambdaMatcher(Predicate<T> matcher, String description)
    {
        this.matcher = matcher;
        this.description = Optional.ofNullable(description);
    }

    @SuppressWarnings("unchecked")
    @Override
    public boolean matches(Object argument)
    {
        return matcher.test((T) argument);
    }

    @Override
    public void describeTo(Description description)
    {
        this.description.ifPresent(description::appendText);
    }
}

示例调用

@Test
public void canFindEmployee()
{
    Employee employee = new Employee("John");
    company.addEmployee(employee);

    verify(mockedDal).registerEmployee(argThat(new LambdaMatcher<>(e -> e.getName()
                                                                         .equals(employee.getName()))));
}

更多信息:http://source.coveo.com/2014/10/01/java8-mockito/

添加到Mockito的新功能使这更容易,

ArgumentCaptor<Person> argument = ArgumentCaptor.forClass(Person.class);
verify(mock).doSomething(argument.capture());
assertEquals("John", argument.getValue().getName());

看一下Mockito文档


如果有多个参数,并且只需要捕获单个参数,则使用其他ArgumentMatchers来包装其余的参数:

verify(mock).doSomething(eq(someValue), eq(someOtherValue), argument.capture());
assertEquals("John", argument.getValue().getName());

还有一种可能,如果你不想使用ArgumentCaptor(例如,因为你也在使用存根),就是将Hamcrest Matchers与Mockito结合使用。

import org.mockito.Mockito
import org.hamcrest.Matchers
...

Mockito.verify(mockedObject).someMethodOnMockedObject(MockitoHamcrest.argThat(
    Matchers.<SomeObjectAsArgument>hasProperty("propertyName", desiredValue)));