为什么sbt不运行Scalatest的示例测试？

Question

请假设正常的“新手”的说法。

我使用的是Scala2.12.10；在build.sbt中，我添加了Scalatest：

libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.8" % "test"

我将一些scala.js添加到一个现有的java项目中，这样我的scala源代码路径是正常的，但是我为java和资源创建了一些空目录，并使用了一个不同的目标，这样就不会与现有的代码发生冲突：

javaSource in Compile := baseDirectory.value / "src/main/scalajs_java"
javaSource in Test := baseDirectory.value / "src/test/scalajs_java"

resourceDirectory in Compile := baseDirectory.value / "src/main/scalajs_resources"
resourceDirectory in Test := baseDirectory.value / "src/test/scalajs_resources"

target := baseDirectory.value / "scalajs_target"

我将ScalaTest示例文件exampleSpec.scala放在src/test/scala/exampleSpect.scala中。该示例使用org.scalatest.run运行良好，如http://www.scalatest.org/所述。

sbt:RedsPro-ScalaJS> show test:fullClasspath
[info] * Attributed(/Users/tballard/git/redspro/reds/scalajs_target/scala-2.12/test-classes)
[info] * Attributed(/Users/tballard/git/redspro/reds/scalajs_target/scala-2.12/classes)
[info] * Attributed(/Users/tballard/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.12.10.jar)
[info] * Attributed(/Users/tballard/.ivy2/cache/org.scala-js/scalajs-library_2.12/jars/scalajs-library_2.12-0.6.31.jar)
[info] * Attributed(/Users/tballard/.ivy2/cache/org.scala-js/scalajs-dom_sjs0.6_2.12/jars/scalajs-dom_sjs0.6_2.12-0.9.7.jar)
[info] * Attributed(/Users/tballard/.ivy2/cache/org.scala-js/scalajs-test-bridge_2.12/jars/scalajs-test-bridge_2.12-0.6.31.jar)
[info] * Attributed(/Users/tballard/.ivy2/cache/org.scala-js/scalajs-test-interface_2.12/jars/scalajs-test-interface_2.12-0.6.31.jar)
[info] * Attributed(/Users/tballard/.ivy2/cache/org.scalatest/scalatest_2.12/bundles/scalatest_2.12-3.0.8.jar)
[info] * Attributed(/Users/tballard/.ivy2/cache/org.scalactic/scalactic_2.12/bundles/scalactic_2.12-3.0.8.jar)
[info] * Attributed(/Users/tballard/.ivy2/cache/org.scala-lang/scala-reflect/jars/scala-reflect-2.12.10.jar)
[info] * Attributed(/Users/tballard/.ivy2/cache/org.scala-lang.modules/scala-xml_2.12/bundles/scala-xml_2.12-1.2.0.jar)

> ls scalajs_target/scala-2.12/test-classes/
ExampleSpec.class   ExampleSpec.sjsir   JS_DEPENDENCIES     org/

sbt:RedsPro-ScalaJS>  show definedTestNames
[info] *
[success] Total time: 1 s, completed Dec 1, 2019, 11:37:51 AM

sbt:RedsPro-ScalaJS> testOnly ExampleSpec
[info] Passed: Total 0, Failed 0, Errors 0, Passed 0
[info] No tests to run for Test / testOnly
[success] Total time: 1 s, completed Dec 1, 2019, 12:44:35 PM

Answer 1

依赖Scalatest时，需要使用%%%而不是%%。通常，您总是需要在Scala.js中使用%%%。