findepi commented on a change in pull request #407:
URL: https://github.com/apache/maven-surefire/pull/407#discussion_r769037716
##########
File path:
surefire-providers/surefire-testng/src/main/java/org/apache/maven/surefire/testng/TestNGExecutor.java
##########
@@ -137,6 +152,31 @@ static void run( Iterable<Class<?>> testClasses, String
testSourceDirectory,
testng.run();
}
+ private static void addXmlClass( List<XmlClass> xmlClasses, String
testClassName )
+ {
+ XmlClass xmlClass = new XmlClass( testClassName );
+ if ( XML_CLASS_SET_INDEX != null )
+ {
+ try
+ {
+ // In case of parallel test execution with parallel="methods",
TestNG orders test execution
+ // by XmlClass.m_index field. When unset (equal for all
XmlClass instances), TestNG can
+ // invoke `@BeforeClass` setup methods on many instances,
without invoking `@AfterClass`
+ // tearDown methods, thus leading to high resource
consumptions when test instances
+ // allocate resources.
+ // With index set, order of setup, test and tearDown methods
is reasonable, with approximately
+ // #thread-count many test classes being initialized at given
point in time.
+ // Note: XmlClass.m_index field is set automatically by TestNG
when it reads a suite file.
+ XML_CLASS_SET_INDEX.invoke( xmlClass, xmlClasses.size() );
+ }
+ catch ( ReflectiveOperationException e )
+ {
+ throw new RuntimeException( e );
+ }
+ }
Review comment:
The code is compiled against TestNG 5.10 and that version doesn't have
the `index` field in `XmlClass`, hence use of reflection.
> Instead of setting the m_index via reflection we could use the appropriate
constructor to set it:
Yes, I can lookup a constructor taking `(String.class, int.class)`
arguments. It's not as robust or future-proof as finding a `setIndex` method
though.
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