sbt testOnly 带有标签的排除列表不起作用

Question

我有一个测试类

import org.scalatest.FlatSpec

import scala.collection.mutable

class Tags101Spec extends FlatSpec {
  "A Stack" should "pop values in last-in-first-out order" in {
    val stack = new mutable.Stack[Int]
    stack.push(1)
    stack.push(2)
    assert(stack.pop() === 2)
    assert(stack.pop() === 1)
  }

  it should "throw NoSuchElementException if an empty stack is popped" in {
    val emptyStack = new mutable.Stack[String]
    intercept[NoSuchElementException] {
      emptyStack.pop()
    }
  }

  "A String" should "return 0 size when empty" taggedAs (Fast) in {
    assert("".size === 0)
  }

  "A Sorted List of 10 numbers" must "return 10 as the first element when reversed" taggedAs (Slow) in {
    assert(10 === (1 to 10).toList.reverse.head)
  }

}

在同一个目录中，我有一个名为Tags 的类，它看起来像

import org.scalatest.Tag

object Slow extends Tag("Slow Tests")
object Fast extends Tag("Fast Tests")

我使用sbt 运行我的测试，方法是包含一个使用-n 标志的标签，它可以工作

sbt:Unit Testing in Scala> testOnly -- -n Fast
[info] Tags101Spec:
[info] A Stack
[info] A String
[info] A Sorted List of 10 numbers
[info] Run completed in 137 milliseconds.
[info] Total number of tests run: 0
[info] Suites: completed 1, aborted 0
[info] Tests: succeeded 0, failed 0, canceled 0, ignored 0, pending 0

由于只有1 测试是taggedAs(Fast)，因此该测试只运行了一项测试。

现在，我想做相反的事情，排除 Fast 标记并运行剩余的测试。这是我尝试过的

sbt:Unit Testing in Scala> testOnly -- -l Fast
[info] Tags101Spec:
[info] A Stack
[info] - should pop values in last-in-first-out order
[info] - should throw NoSuchElementException if an empty stack is popped
[info] A String
[info] - should return 0 size when empty
[info] A Sorted List of 10 numbers
[info] - must return 10 as the first element when reversed
[info] Run completed in 252 milliseconds.
[info] Total number of tests run: 4
[info] Suites: completed 1, aborted 0
[info] Tests: succeeded 4, failed 0, canceled 0, ignored 0, pending 0

如您所见，它运行了4 测试，这是所有测试，包括1 Fast 标记测试。

我在这里缺少什么？如何使排除标记与sbt 一起使用？

谢谢

Answer 1

-l 或-n 的参数应该是传递给Tags 构造函数的name 字符串参数，而不是对象的名称。例如，给定

object Slow extends Tag("SlowTests")
object Fast extends Tag("FastTests")

然后用

排除

testOnly -- -l FastTests

而不是

testOnly -- -l Fast

哪个输出

[info] Tags101Spec:
[info] A Stack
[info] - should pop values in last-in-first-out order
[info] - should throw NoSuchElementException if an empty stack is popped
[info] A String
[info] A Sorted List of 10 numbers
[info] - must return 10 as the first element when reversed
[info] Run completed in 187 milliseconds.
[info] Total number of tests run: 3
[info] Suites: completed 1, aborted 0
[info] Tests: succeeded 3, failed 0, canceled 0, ignored 0, pending 0
[info] All tests passed.

我们看到A string 测试没有执行。

在像这样构造Tags 时，我个人会使用完全限定名称作为name 参数

package example

import org.scalatest.Tag

object Slow extends Tag("example.Slow")
object Fast extends Tag("example.Fast")

并执行

testOnly -- -n example.Fast

哪个输出

[info] Tags101Spec:
[info] A Stack
[info] A String
[info] - should return 0 size when empty
[info] A Sorted List of 10 numbers
[info] Run completed in 158 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.