我正在尝试使用org.hamcrest.Matchers.contains(java.util.List<Matcher<? super E>>),但编译器告诉我它无法解析该方法。Hamcrest Matchers包含与匹配器列表
我甚至试图通过Hamcrest here给出的例子,但我得到相同的编译错误:
assertThat(Arrays.asList("foo", "bar"), contains(Arrays.asList(equalTo("foo"), equalTo("bar"))));
Error:(13, 9) java: no suitable method found for assertThat(java.util.List<java.lang.String>,org.hamcrest.Matcher<java.lang.Iterable<? extends java.util.List<org.hamcrest.Matcher<java.lang.String>>>>)
method org.hamcrest.MatcherAssert.<T>assertThat(T,org.hamcrest.Matcher<? super T>) is not applicable
(actual argument org.hamcrest.Matcher<java.lang.Iterable<? extends java.util.List<org.hamcrest.Matcher<java.lang.String>>>> cannot be converted to org.hamcrest.Matcher<? super java.util.List<java.lang.String>> by method invocation conversion)
method org.hamcrest.MatcherAssert.<T>assertThat(java.lang.String,T,org.hamcrest.Matcher<? super T>) is not applicable
(cannot instantiate from arguments because actual and formal argument lists differ in length)
method org.hamcrest.MatcherAssert.assertThat(java.lang.String,boolean) is not applicable
(actual argument java.util.List<java.lang.String> cannot be converted to java.lang.String by method invocation conversion)
我试着投的第二个参数匹配器<?超级列表<字符串> >
assertThat(Arrays.asList("foo", "bar"), (Matcher<? super List<String>>)contains(Arrays.asList(equalTo("foo"), equalTo("bar"))));
但后来我得到另一个编译错误:
Error:(16, 88) java: inconvertible types
required: org.hamcrest.Matcher<? super java.util.List<java.lang.String>>
found: org.hamcrest.Matcher<java.lang.Iterable<? extends java.util.List<org.hamcrest.Matcher<java.lang.String>>>>
有没有办法正确地使用这种方法吗?
该匹配器会检查列表是否包含某个元素,但是您传递的是匹配器列表。 'Arrays.asList(“foo,”bar“)''是一个'List',所以它不会包含'asList(equalTo(”foo“),equalTo(”bar“))'。测试? –
yshavit
请阅读该方法的Javadoc(参见提供的链接) Matchers.contains(列表)应该验证第一个参数中的每个项目是否满足第二个参数中相应的匹配器 –
'assertThat(Arrays .asList(“foo”,“bar”),contains(Arrays.asList(equalTo(“foo”),equalTo(“bar”)));'工作;你有一些奇怪的静态导入包含或equalTo? – beresfordt