问题描述
那将是一个简单的选择,但是如果我的类路径中同时包含两个库,那么我找不到它们之间的区别以及要使用的哪个区别?
That's going to be an easy one, but I cannot find the difference between them and which one to use, if I have both the lib's included in my classpath?
推荐答案
Hamcrest匹配器方法返回Matcher<T>
,而Mockito匹配器返回T.因此,例如:org.hamcrest.Matchers.any(Integer.class)
返回org.hamcrest.Matcher<Integer>
的实例,而org.mockito.Matchers.any(Integer.class)
返回Integer
的实例.
Hamcrest matcher methods return Matcher<T>
and Mockito matchers return T. So, for example: org.hamcrest.Matchers.any(Integer.class)
returns an instance of org.hamcrest.Matcher<Integer>
, and org.mockito.Matchers.any(Integer.class)
returns an instance of Integer
.
这意味着仅当在签名中需要Matcher<?>
对象时(通常在assertThat
调用中),才可以使用Hamcrest匹配器.在要调用模拟对象的方法的地方设置期望或验证时,请使用Mockito匹配器.
That means that you can only use Hamcrest matchers when a Matcher<?>
object is expected in the signature - typically, in assertThat
calls. When setting up expectations or verifications where you are calling methods of the mock object, you use the Mockito matchers.
例如(为清楚起见,使用全限定名称):
For example (with fully qualified names for clarity):
@Test
public void testGetDelegatedBarByIndex() {
Foo mockFoo = mock(Foo.class);
// inject our mock
objectUnderTest.setFoo(mockFoo);
Bar mockBar = mock(Bar.class);
when(mockFoo.getBarByIndex(org.mockito.Matchers.any(Integer.class))).
thenReturn(mockBar);
Bar actualBar = objectUnderTest.getDelegatedBarByIndex(1);
assertThat(actualBar, org.hamcrest.Matchers.any(Bar.class));
verify(mockFoo).getBarByIndex(org.mockito.Matchers.any(Integer.class));
}
如果要在需要Mockito匹配器的环境中使用Hamcrest匹配器,则可以使用org.mockito.Matchers.argThat
匹配器.它将Hamcrest匹配器转换为Mockito匹配器.因此,假设您想以某种精度(但不是很多)匹配一个double值.在这种情况下,您可以执行以下操作:
If you want to use a Hamcrest matcher in a context that requires a Mockito matcher, you can use the org.mockito.Matchers.argThat
matcher. It converts a Hamcrest matcher into a Mockito matcher. So, say you wanted to match a double value with some precision (but not much). In that case, you could do:
when(mockFoo.getBarByDouble(argThat(is(closeTo(1.0, 0.001))))).
thenReturn(mockBar);
这篇关于Mockito的Matcher与Hamcrest Matcher?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!