org.apache.flink.testutils.logging

Class TestLoggerResource

java.lang.Object

org.junit.rules.ExternalResource

org.apache.flink.testutils.logging.TestLoggerResource

All Implemented Interfaces:

org.junit.rules.TestRule

public class TestLoggerResource
extends org.junit.rules.ExternalResource

Utility for auditing logged messages.

Note: If a parent logger is already defined with a less specific log level, then using the TestLoggerResource can increase the number of log messages received by this logger.

Example: You define a logger for org.apache.runtime with log level INFO and then use TestLoggerResource to listen on org.apache.runtime.feature with log level DEBUG. In this case, the log output for the parent logger will include DEBUG messages org.apache.runtime.feature.

Implementation note: Make sure to not expose log4j dependencies in the interface of this class to ease updates in logging infrastructure.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TestLoggerResource.SingleTestResource SingleTestResource re-uses the code in TestLoggerResource for try-with-resources statement.

Constructor Summary

Constructors

Constructor and Description
TestLoggerResource(Class<?> clazz, org.slf4j.event.Level level)

Method Summary

Modifier and Type	Method and Description
protected void	after()
static TestLoggerResource.SingleTestResource	asSingleTestResource(String loggerName, org.slf4j.event.Level level) Enables the use of TestLoggerResource for try-with-resources statement.
protected void	before()
List<String>	getMessages()

Methods inherited from class org.junit.rules.ExternalResource

apply

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TestLoggerResource

public TestLoggerResource(Class<?> clazz,
                          org.slf4j.event.Level level)

Method Detail

getMessages

public List<String> getMessages()

before

protected void before()
               throws Throwable

Overrides:

before in class org.junit.rules.ExternalResource

Throws:

Throwable

after

protected void after()

Overrides:

after in class org.junit.rules.ExternalResource

asSingleTestResource

public static TestLoggerResource.SingleTestResource asSingleTestResource(String loggerName,
                                                                         org.slf4j.event.Level level)
                                                                  throws Throwable

Enables the use of TestLoggerResource for try-with-resources statement.

Throws:

Throwable