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shrine-medco/commons/util/src/test/scala/net/shrine/log/LoggableTest.scala
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LoggableTest.scala
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package net.shrine.log
import net.shrine.util.ShouldMatchersForJUnit
import org.apache.log4j.Level
import scala.collection.mutable.{Map => MMap}
/**
*
* @author Clint Gilbert
* @date Oct 11, 2011
*
* @link http://cbmi.med.harvard.edu
*
* This software is licensed under the LGPL
* @link http://www.gnu.org/licenses/lgpl.html
*
*/
final class LoggableTest extends ShouldMatchersForJUnit {
import Level.{DEBUG, ERROR, FATAL, INFO, WARN}
def testDebug = doTest(_.debug, DEBUG, logMessageIsLazy = true)
def testInfo = doTest(_.info, INFO, logMessageIsLazy = true)
def testWarn = doTest(_.warn, WARN, logMessageIsLazy = false)
def testError = doTest(_.error, ERROR, logMessageIsLazy = false)
private def doTest(log: Loggable => (=> Any) => Unit, level: Level, logMessageIsLazy: Boolean) {
{
val loggable = new MockLoggable
var messageComputed = false
val otherLevel = if (logMessageIsLazy) higher(level) else not(level)
loggable.logger.setLevel(otherLevel)
log(loggable)({ messageComputed = true; "message" })
{
val shouldHaveBeenComputed = !logMessageIsLazy
//the log message should NOT have been computed if this log method is lazy
messageComputed should be(shouldHaveBeenComputed)
//but we should have tried to log
loggable.loggedAt(level) should be(true)
}
}
{
val loggable = new MockLoggable
var messageComputed = false
loggable.logger.setLevel(level)
log(loggable)({ messageComputed = true; "message" })
//the log message should have been computed
messageComputed should be(true)
//we should have tried to log at the desired level
loggable.loggedAt(level) should be(true)
//and at no other levels
loggable.loggedAt.exists { case (priority, happened) => priority != priority && happened == true } should be(false)
}
}
private val priorities: Map[Level, Int] = Seq(DEBUG, INFO, WARN, ERROR, FATAL).zipWithIndex.toMap
private def next(level: Level, adjust: Int => Int): Level = {
val numericalPriority = priorities(level)
val adjustedPriority = adjust(numericalPriority)
priorities.find { case (_, index) => index == adjustedPriority }.map { case (p, _) => p }.get
}
private def not(level: Level): Level = priorities.keys.find(_ != level).get
private def higher(level: Level): Level = next(level, _ + 1)
private def lower(level: Level): Level = next(level, _ - 1)
private final class MockLoggable extends Loggable {
val loggedAt: MMap[Level, Boolean] = MMap.empty
override def debug(s: => Any) {
loggedAt(Level.DEBUG) = true
super.debug(s)
}
override def info(s: => Any) {
loggedAt(Level.INFO) = true
super.info(s)
}
override def warn(s: => Any) {
loggedAt(Level.WARN) = true
super.warn(s)
}
override def error(s: => Any) {
loggedAt(Level.ERROR) = true
super.error(s)
}
}
}
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