java - Hamcrest hasItem 在 ArrayList 中不匹配

Question

我目前正在测试 hasItem() Matcher 但无济于事。请参阅下面的示例代码:

List<String> list = new ArrayList<String>();

list.add("1");
list.add("2");
list.add("3");

org.junit.Assert.assertThat(list, hasItem("3"));

它产生

java.lang.NoSuchMethodError: org.hamcrest.Matcher.describeMismatch(Ljava/lang/Object;Lorg/hamcrest/Description;)V
    at org.hamcrest.core.IsCollectionContaining.matchesSafely(IsCollectionContaining.java:31)
    at org.hamcrest.core.IsCollectionContaining.matchesSafely(IsCollectionContaining.java:14)
    at org.hamcrest.TypeSafeDiagnosingMatcher.matches(TypeSafeDiagnosingMatcher.java:55)
    at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:12)
    at org.junit.Assert.assertThat(Assert.java:865)
    at org.junit.Assert.assertThat(Assert.java:832)
    ...

Answer 1

我做了一个本地测试，使用 JUnit-4.11 和 Hamcrest-Core-1.3 对我来说效果很好:

import java.util.ArrayList;
import java.util.List;

import org.hamcrest.core.IsCollectionContaining;
import org.junit.Test;

public class Example {
    @Test public void test() {
        List<String> list = new ArrayList<String>();
        list.add("1");
        list.add("2");
        list.add("3");
        org.junit.Assert.assertThat(list, IsCollectionContaining.hasItem("3"));
    }
}

您可以使用与我相同的库版本和导入再试一次吗？