sbt 测试仅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，看起来像

import org.scalatest.Tag
object Slow extends Tag("Slow Tests")
object Fast extends Tag("Fast Tests")

我通过使用-n标志包含标签来使用sbt运行我的测试，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1测试taggedAs(Fast)，测试只运行一个测试。

现在，我想做相反的事情，排除Fast标签并运行剩余的测试。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1Fast标记的测试。

我在这里错过了什么？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Tag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")

然后排除

testOnly -- -l FastTests

而不是

testOnly -- -l Fast

哪些输出

[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。

就个人而言，在构造这样的Tag时，我会使用一个完全限定的名称作为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

哪些输出

[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.