玩斯卡拉：在测试中使用Nop记录器来抑制日志记录

Question

我试图在我的游戏框架测试用例中抑制日志记录。实现这一点的一种方法是在类路径中使用slf4j nop jar，而不是像logback classic这样的其他实现。我能够在sbt中这样做，如下所示。

libraryDependencies += "org.slf4j" % "slf4j-nop" % "1.7.6" % "test"

(dependencyClasspath in Test) <<= (dependencyClasspath in Test) map {
  _.filterNot(_.data.name.contains("logback-classic"))
}

但是当我运行我的测试时，我仍然得到下面的错误

[info] Exception encountered when attempting to run a suite with class name: JobControllerSpec *** ABORTED ***
[info]   java.lang.NoClassDefFoundError: ch/qos/logback/classic/LoggerContext
[info]   at play.api.libs.logback.LogbackLoggerConfigurator.configure(LogbackLoggerConfigurator.scala:80)
[info]   at play.api.libs.logback.LogbackLoggerConfigurator.configure(LogbackLoggerConfigurator.scala:62)
[info]   at play.api.inject.guice.GuiceApplicationBuilder$$anonfun$applicationModule$1.apply(GuiceApplicationBuilder.scala:102)
[info]   at play.api.inject.guice.GuiceApplicationBuilder$$anonfun$applicationModule$1.apply(GuiceApplicationBuilder.scala:102)
[info]   at scala.Option.foreach(Option.scala:257)
[info]   at play.api.inject.guice.GuiceApplicationBuilder.applicationModule(GuiceApplicationBuilder.scala:101)
[info]   at play.api.inject.guice.GuiceBuilder.injector(GuiceInjectorBuilder.scala:181)
[info]   at play.api.inject.guice.GuiceApplicationBuilder.build(GuiceApplicationBuilder.scala:123)
[info]   at org.scalatestplus.play.OneAppPerSuite$class.app(OneAppPerSuite.scala:126)
[info]   at JobControllerSpec.app$lzycompute(JobControllerSpec.scala:12)
[info]   ...
[info]   Cause: java.lang.ClassNotFoundException: ch.qos.logback.classic.LoggerContext
[info]   at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
[info]   at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
[info]   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
[info]   at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
[info]   at play.api.libs.logback.LogbackLoggerConfigurator.configure(LogbackLoggerConfigurator.scala:80)
[info]   at play.api.libs.logback.LogbackLoggerConfigurator.configure(LogbackLoggerConfigurator.scala:62)
[info]   at play.api.inject.guice.GuiceApplicationBuilder$$anonfun$applicationModule$1.apply(GuiceApplicationBuilder.scala:102)
[info]   at play.api.inject.guice.GuiceApplicationBuilder$$anonfun$applicationModule$1.apply(GuiceApplicationBuilder.scala:102)
[info]   at scala.Option.foreach(Option.scala:257)
[info]   at play.api.inject.guice.GuiceApplicationBuilder.applicationModule(GuiceApplicationBuilder.scala:101)

为什么在日志日志中对日志经典有硬依赖性，例如 scala？

这是我的依赖关系的状态

[project] $ show libraryDependencies
[info] List(org.scala-lang:scala-library:2.11.8, com.typesafe.play:twirl-api:1.1.1, com.typesafe.play:play-server:2.5.4, com.typesafe.play:play-test:2.5.4:test, com.typesafe.play:play-omnidoc:2.5.4:docs, com.typesafe.play:play-netty-server:2.5.4, com.typesafe.play:play-logback:2.5.4, com.typesafe.play:play-cache:2.5.4, com.typesafe.play:play-ws:2.5.4, com.typesafe.play:play-slick:2.0.0, com.typesafe.play:play-slick-evolutions:2.0.0, com.h2database:h2:1.4.187, mysql:mysql-connector-java:5.1.6, net.codingwell:scala-guice:4.1.0, org.scalatestplus.play:scalatestplus-play:1.5.0:test, org.slf4j:slf4j-nop:1.7.6:test)

Answer 1

我没有使用＜code＞slf4j nop＜code＞的经验，但您可以在＜code＞test/resources/logback中为测试提供特殊的logback配置。xml将覆盖conf/logback.xml