本文介绍了jUnit 中的 CollectionAssert?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
是否有与 NUnit 的 CollectionAssert?
Is there a jUnit parallel to NUnit's CollectionAssert?
推荐答案
使用 JUnit 4.4，您可以将 assertThat() 与 Hamcrest 代码(别担心，它随 JUnit 一起提供，不需要额外的 .jar)来生成复杂的自描述断言，包括那些对集合进行操作:
Using JUnit 4.4 you can use assertThat() together with the Hamcrest code (don't worry, it's shipped with JUnit, no need for an extra .jar) to produce complex self-describing asserts including ones that operate on collections:
import static org.junit.Assert.assertThat;
import static org.junit.matchers.JUnitMatchers.*;
import static org.hamcrest.CoreMatchers.*;
List<String> l = Arrays.asList("foo", "bar");
assertThat(l, hasItems("foo", "bar"));
assertThat(l, not(hasItem((String) null)));
assertThat(l, not(hasItems("bar", "quux")));
// check if two objects are equal with assertThat()
// the following three lines of code check the same thing.
// the first one is the "traditional" approach,
// the second one is the succinct version and the third one the verbose one
assertEquals(l, Arrays.asList("foo", "bar")));
assertThat(l, is(Arrays.asList("foo", "bar")));
assertThat(l, is(equalTo(Arrays.asList("foo", "bar"))));
使用这种方法，您将在断言失败时自动获得对断言的良好描述.
Using this approach you will automagically get a good description of the assert when it fails.
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