我遇到过失败的测试，据我所知，这些测试都应该通过。我在这里遗漏了一些明显的东西吗？
import org.scalatest._
class xxxTests extends FlatSpec with ShouldMatchers {
import math.{Pi => PI}
"" should "(this should pass)" in {
assert( 0.0 === 0.0 ) // ok
(1e-100) should equal ((0.0) plusOrMinus 1e-5) // FAILS!!! "1.0E-100 did not equal DoubleTolerance(0.0,1.0E-5)"
(1e-3) should not equal ((0.0) plusOrMinus 1e-5) // ok
(0.0) should equal ((0.0) plusOrMinus 1e-5) // FAILS!!! "0.0 did not equal DoubleTolerance(0.0,1.0E-5)"
}
}
我在 Scalatest 1.8 和 2.0M4 上都经历过这种情况。
最佳答案
问题:必须使用be ，不是 equal .
离开这里是我愚蠢的标志(嗯，注意力不集中)。
https://groups.google.com/forum/?fromgroups=#!msg/scalatest-users/pb54GzOej6I/C9714h_OW_UJ
You must use plusOrMinus with "be" not "equal". "equal" always compares for equality by invoking == on one object, passing in the other. "be" does different things depending on what object is being passed. So try:
0.5 must be (0.5 plusOrMinus 0.1)
关于scala - Scalatest 'DoubleTolerance' 中的错误？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12970246/