How to view autoconfigure log output during spring boot tests (integration tests)

Question

I am trying to debug a spring boot application during tests especially see the log output.

I am not sure how to get the same autoconfigure log output during tests as the one I get when I run the application.

I have tried this (from src/main/resources/application-test.properties):

logging.level.org.springframework.boot.autoconfigure.test=DEBUG

and

logging.level.org.springframework.boot.autoconfigure=DEBUG

By the way I use log4j with the following configuration (from src/main/resources/log4j.properties):

log4j.rootLogger=WARN, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d [%t] %-5p %c - %m%n

edit: I have migrated to logback. Here is my src/main/resources/logback-test.xml:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
        </layout>
    </appender>

    <logger name="org.springframework.boot.autoconfigure" level="debug"/>

    <root level="warn">
        <appender-ref ref="STDOUT"/>
    </root>
</configuration>

I still don't get any autoconfigure information during tests...

Answer 1

I don't believe it is good idea to combine explicit log4j configuration (log4j.properties) with Spring Boot one. I would use one or the other.

Auto-configuration information is printed when DEBUG level is configured for org.springframework.boot.autoconfigure.logging package.

In this case log4j.properties seem to apply. Try to change:

log4j.rootLogger=DEBUG, stdout

Or if you decide go with application properties:

logging.level.org.springframework.boot.autoconfigure.logging=DEBUG

BTW, log4j is ancient technology. You should migrate to LogBack or log4j2.