import org.scalatest.{AppendedClues, Matchers, WordSpec}
class SomeTest extends WordSpec with Matchers with AppendedClues {
"Clues" should {
"not be appended" when {
"assertions pass" in {
"hi" should equal ("hi") withClue "Greetings scala tester!"
}
}
"be appended" when {
"assertions fail" in {
1 + 1 should equal (3) withClue ", not even for large values of 1!"
}
}
"not be needed" when {
"looking at collection sizes" in {
val list = List(1, 2, 3)
list should have size 5
}
}
}
}
输出如下:
SomeTest:
Clues
should not be appended
- when assertions pass
should be appended
- when assertions fail *** FAILED ***
2 did not equal 3, not even for large values of 1! (SomeTest.scala:15)
should not be needed
- when looking at collection sizes *** FAILED ***
List(1, 2, 3) had size 3 instead of expected size 5 (SomeTest.scala:21)
2 回答
你是第一个要求这样一个功能的人 . 实现这一目标的一种方法是使用withClue . 就像是:
这应该会给你这个错误信息:
NumberOfElements:10不等于5
如果要完全控制消息,可以编写自定义匹配器 . 或者您可以使用断言,如下所示:
你能详细说明你的用例是什么吗?为什么10不等于5不符合鼻烟,你有多少经常有这种需要?
这是你要求的东西:
所以这样你就可以写:
自2011年以来的新方式:
Matchers
和AppendedClue
特征 . 此外,对于集合大小,还有一些默认消息 .输出如下:
请注意,对于长
.toString
输出的列表,List
size消息不是很好 .有关更多信息,请参阅scaladoc .