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https://issues.apache.org/jira/browse/SUREFIRE-1614?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tibor Digana updated SUREFIRE-1614:
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Comment: was deleted
(was: Nothing is swallowed for sure!
Have you noticed the dump files in target/surefire-reports?
Don;t care of the console. If some tool prints to the native system output, it
is supposed to be a bug of the tool or your library or JVM.
We cannot print it to the Maven console because it is unwanted. The native
streams want to bypass all the reporters and so we cannot print them even if
the user wants to. So you will find them in the dump file.)
> JUnit Runner that writes to System.out corrupts Surefire's STDOUT when using
> JUnit's Vintage Engine
> ---------------------------------------------------------------------------------------------------
>
> Key: SUREFIRE-1614
> URL: https://issues.apache.org/jira/browse/SUREFIRE-1614
> Project: Maven Surefire
> Issue Type: Bug
> Components: JUnit 5.x support
> Affects Versions: 2.22.1, 3.0.0-M2
> Reporter: Andy Wilkinson
> Assignee: Christian Stein
> Priority: Major
> Fix For: 2.22.2, 3.0.0-M3
>
> Attachments: surefire-stream-corruption-bug.zip
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When JUnit Jupiter's Vintage Engine is used to run tests written using the
> JUnit 4 API, output to the console from a {{TestRunner}} results in
> Surefire's STDOUT being corrupted:
> {noformat}
> [WARNING] Corrupted STDOUT by directly writing to native stream in forked JVM
> 1. See FAQ web page and the dump file […]{noformat}
> Note that the test runner is simply calling {{System.out}}. This is to
> simulate the real world setup where the runner performs some logging that
> ultimately results in a console appender calling {{System.out}}. The same
> arrangement does not cause a problem when run using JUnit 4. An initial
> investigation suggests that the Vintage Engine calls the custom
> {{TestRunner}} earlier and, it would appear, at a time when Surefire cannot
> tolerate output to {{System.out}}.
> I have attached a minimal project that reproduces the problem. Running
> {{./mvnw -Pjunit5 test}} will reproduce the corruption. Running {{./mvnw
> -Pjunit4 test}} will not.
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