Logging on test failures
Use @LogOnFailure to easily suppress logging for successful tests but not for failed tests.
Supported logging frameworks
The following logging framework implementations are supported:
java.util.logging
Any field with a value of type java.util.logging.Logger is supported.
Log4j
Any field with a value of type org.apache.logging.log4j.core.Logger is supported. This means that using Log4j 2.x with org.apache.logging.log4j:log4j-core as implementation allows you to simply use LogManager to assign the value. Using different implementations (e.g. org.apache.logging.log4j:log4j-jul) is not supported.
Logback
Any field with a value of type ch.qos.logback.classic.Logger is supported. Since logback is a native SLF4J implementation, this allows you to simply use LoggerFactory to assign the value. Using different bindings is not supported.
Reload4j
Any field with a value of type org.apache.log4j.Logger is supported.
Since reload4j is a fork of Log4j 1.2.17, org.apache.log4j.Logger should also be usable for when using Log4j 1.2.17.
API based frameworks
For API based frameworks like SLF4J and Log4j, the logger to use depends on the binding. For instance, use java.util.logging.Logger if the binding is org.slf4j:slf4j-jdk14 or org.apache.logging.log4j:log4j-jul, etc.