Java hamcrest hasItem 和 hasProperty，断言是否存在具有属性值的对象
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hamcrest hasItem and hasProperty, assert if a object with property value exists
提问by wenic
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.hasItem;
import static org.hamcrest.Matchers.equalTo;
assertThat(actual, hasItem(hasProperty("id", equalTo(1L))));
where actual is a POJO with id as Long.
其中 actual 是一个 ID 为 Long 的 POJO。
I get,
我明白了，
The method assertThat(T, Matcher<? super T>)in the type MatcherAssertis not applicable for the arguments (List<Pojo>, Matcher<Iterable<? super Object>>)
assertThat(T, Matcher<? super T>)类型中的方法MatcherAssert不适用于参数(List<Pojo>, Matcher<Iterable<? super Object>>)
From various documentation and other stackoverflow pages, it should be valid, but I get the above error.
从各种文档和其他 stackoverflow 页面来看，它应该是有效的，但我收到了上述错误。
采纳答案by pobrelkey
Try explicitly filling in the type parameter - assuming actualis a List<YourPojo>, try calling:
尝试明确填写类型参数 - 假设actual是 a List<YourPojo>，尝试调用：
assertThat(actual, hasItem(Matchers.<YourPojo>hasProperty("id", equalTo(1L))));
回答by Cyva
The shorter version when you do not have to specify class type:
不必指定类类型时的较短版本：
List<IssueDefinitionDto> definitions = ...; // Tested variable
...
assertThat(definitions, hasItem(hasProperty("id", is(10L))));
