問(wèn)題描述
這將是一個(gè)簡(jiǎn)單的問(wèn)題，但如果我的類路徑中包含兩個(gè)庫(kù)，我找不到它們之間的區(qū)別以及使用哪一個(gè)?
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?
推薦答案
Hamcrest 匹配器方法返回 Matcher 并且 Mockito 匹配器返回 T.因此，例如:org.hamcrest.Matchers.any(Integer.class) 返回 org.hamcrest.Matcher 的實(shí)例，以及 org.mockito.Matchers.any(Integer.class)code> 返回 Integer 的一個(gè)實(shí)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.
這意味著您只能在簽名中需要 Matcher 對(duì)象時(shí)使用 Hamcrest 匹配器 - 通常是在 assertThat 調(diào)用中.在調(diào)用模擬對(duì)象的方法的地方設(shè)置期望或驗(yàn)證時(shí)，您可以使用 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(為了清楚起見(jiàn)，使用完全限定的名稱):
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));
}
如果您想在需要 Mockito 匹配器的上下文中使用 Hamcrest 匹配器，您可以使用 org.mockito.Matchers.argThat 匹配器.它將 Hamcrest 匹配器轉(zhuǎn)換為 Mockito 匹配器.因此，假設(shè)您想以某種精度(但不多)匹配雙精度值.在這種情況下，您可以這樣做:
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);
這篇關(guān)于Mockito's Matcher vs Hamcrest Matcher?的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！