java - Mockito 验证字符串集合

Question

我想验证一个准确的 Collection 是否传递给了模拟方法。 这就是我尝试这样做的方式:

This is a simple example of my real code, which reproduce exactly the same problem.

import com.google.common.collect.Lists;
import org.hamcrest.Matchers;
import org.junit.jupiter.api.Test;
import org.mockito.Mockito;
import org.mockito.hamcrest.MockitoHamcrest;

import java.util.Collection;

public class MockTest {

    @Test
    void mockTest() {

        final Collection<String> collection = Mockito.mock(Collection.class);

        collection.addAll(Lists.newArrayList("hello"));

        Mockito.verify(collection).addAll(MockitoHamcrest.argThat(Matchers.contains("hello")));
    }
}

但它不起作用，我得到了这个编译错误:

Error:(20, 35) java: incompatible types: inference variable T has incompatible bounds
    equality constraints: java.lang.Iterable<? extends E>
    lower bounds: java.util.Collection<? extends java.lang.String>,java.lang.Object

关于为什么它不起作用或我如何以不同的方式做它的任何想法？

Answer 1

你能试试下面的代码吗

@Test
public void mockTest() {

    final Collection<String> collection = Mockito.mock(Collection.class);

    collection.addAll(Lists.newArrayList("hello"));

    Mockito.verify(collection).addAll((Collection<? extends String>) MockitoHamcrest.argThat(Matchers.contains("hello")));
}