最大规模的匹配选项

Question

我有这个简单的测试：

test("transform /home into Array(/home)") {
    val path = "/home"
    val expected: Option[Array[String]] = Some(Array("/home"))
    val actual: Option[Array[String]] = luceneService.buildCategoryTree(path)
    actual shouldEqual expected
}

我遇到了这个失败：

Some(Array("/home")) did not equal Some(Array("/home"))

怎么会这样？

据我了解，docs 声明我应该能够在测试中使用选项

如果我将测试更改为

actual.get shouldEqual expected.get

它通过了

Answer 1

最晚的docs

有一节说：

You can work with options using ScalaTest's equality, empty, defined, and contain syntax. For example, if you wish to check whether an option is None, you can write any of:

所以你的测试（抱歉我没有 de lucerne 对象），我也认为是一些 thing wrong when using arrays

Unfortunately, the current implementation is not able to "properly" understand Array equality if arrays are within another container such as Set[Array[Int]]. For example, I would have expected the following test to pass instead of throwing a TestFailedException:

进口org.scalatest._

class SetSuite extends FunSuite with Matchers {

  test("transform /home into Array(/home)") {
    val path = "/home"
    val expected: Option[Array[String]] = Some(Array("/home"))
    val actual: Option[Array[String]] = Some(Array(path))
    actual shouldEqual expected
  }
}

[info] SetSuite:
[info] - transform /home into Array(/home) *** FAILED ***
[info]   Some(Array("/home")) did not equal Some(Array("/home")) (TestScalaTest.scala:9)
[info] Run completed in 335 milliseconds.
[info] Total number of tests run: 1
[info] Suites: completed 1, aborted 0
[info] Tests: succeeded 0, failed 1, canceled 0, ignored 0, pending 0
[info] *** 1 TEST FAILED ***
[error] Failed tests:
[error]     SetSuite
[error] (test:test) sbt.TestsFailedException: Tests unsuccessful
[error] Total time: 11 s, completed Mar 17, 2016 12:26:25 AM

所以为了测试让我们使用

import org.scalatest._

class SetSuite extends FunSuite with Matchers {

  test("transform /home into Array(/home)") {
    val path = "/home"
    val expected: Option[Array[String]] = Some(Array("/home"))
    val actual: Option[Array[String]] = Some(Array(path))
    actual should contain (Array("/home"))
  }
}

[info] SetSuite:
[info] - transform /home into Array(/home)
[info] Run completed in 201 milliseconds.
[info] Total number of tests run: 1
[info] Suites: completed 1, aborted 0
[info] Tests: succeeded 1, failed 0, canceled 0, ignored 0, pending 0
[info] All tests passed.
[success] Total time: 2 s, completed Mar 17, 2016 12:33:01 AM

Answer 2

匹配器似乎存在错误。使用 Seq 而不是 Array 有效：

val expected = Some(Seq("/home"))
val actual = luceneService.buildCategoryTree(path).map(_.toSeq)
actual shouldEqual expected

Answer 3

这是 scalatest 的数组问题。如果您将数组转换为向量或列表

，则相同的测试工作得很好

最大规模的匹配选项

Scalatest matching options

scala

scalatest