Rocher Suchard created MCOMPILER-478:
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Summary: testCompile with specific module-info.java partially copy
target/classes to target/test-classes
Key: MCOMPILER-478
URL: https://issues.apache.org/jira/browse/MCOMPILER-478
Project: Maven Compiler Plugin
Issue Type: Bug
Affects Versions: 3.8.1
Reporter: Rocher Suchard
Attachments: surefire-empty-packages.zip
Hello,
I am trying to understand how I can fix this particular bug that occurs while
compiling test sources with {{src/test/java/module-info.java}} (or
{{src/test/jpms/module-info.java}} in my case because this would make Eclipse
fails, due to having two module-info.java).
The {{module-info}} that I put in {{src/test/jpms}} is more or less the same as
{{{}src/main/jpms{}}}, but with some test modules (like {{{}org.opentest4j{}}},
{{{}org.junit.jupiter.api{}}}, and {{{}org.assertj.core{}}}). This is pretty
much what is explained here at the end of page:
[https://maven.apache.org/surefire/maven-surefire-plugin/examples/jpms.html#].
When I try to run tests, maven-surefire-plugin fails: the JVM is not happy
about a package not found.
{code:java}
# Created at 2021-12-26T23:43:40.644
Corrupted STDOUT by directly writing to native stream in forked JVM 1. Stream
'Error occurred during initialization of boot layer'.
# Created at 2021-12-26T23:43:40.647
Corrupted STDOUT by directly writing to native stream in forked JVM 1. Stream
'java.lang.module.FindException: Error reading module:'.
# Created at 2021-12-26T23:43:40.647
Corrupted STDOUT by directly writing to native stream in forked JVM 1. Stream
'...\target\test-classes'.
# Created at 2021-12-26T23:43:40.648
Corrupted STDOUT by directly writing to native stream in forked JVM 1. Stream
'Caused by: java.lang.module.InvalidModuleDescriptorException:'.
# Created at 2021-12-26T23:43:40.649
Corrupted STDOUT by directly writing to native stream in forked JVM 1. Stream
'Package org.acme.functions not found in module'.
{code}
At first, I thought it was something related to maven-surefire-plugin and I
wanted to create a SUREFIRE JIRA issue, but I discovered that something - I
presume maven-compiler-plugin - is copying used classes from {{target/classes}}
to {{target/test-classes}} during test compilation.
In the case of my interface, it is not used and I presume the "something" that
I speak about do partial copy of used files during compilation.
If we edit the src\main\java\org\acme\impl\AImpl.java to use the interface
(should be commented in the attached ZIP):
{code:java}
public class AImpl implements A {
@Override public void doSomethingCool() {
org.acme.functions.BooleanConsumer bc = v -> {};
throw new UnsupportedOperationException("no doing something cool");
}
}
{code}
The class file is copied and surefire does not fail.
The attached ZIP file exhibit the problem :
If we simply compile with tests: {{{}mvn install{}}}: {{maven-surefire-plugin}}
will fails to execute test because of missing package. I could probably remove
the offending package from test/module-info but I don't think I should tinker
to much : the test/module-info should really "extends" the main/module-info and
only add packages/modules.
If we skip test : {{{}mvn install -DskipTests{}}}: {{maven-jar-plugin}} will
fails to execute to process due to a jar error {_}(jar: Package
org.acme.functions missing from ModulePackages class file attribute{_}){_}.{_}
A solution to both issues would be to create dedicated tests project, with its
own module-info.java and another module name (eg: org.acme.tests).
*Note :* the attached project requires Maven 3.8.4 (there is a maven wrapper
inside) and Java 17. I don't know if this fail with Java 11.
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