findepi commented on a change in pull request #407:
URL: https://github.com/apache/maven-surefire/pull/407#discussion_r783424283
##########
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:
@Tibor17 it's possible to select and invoke one of the constructors, but
i don't think the added complexity is worth the effort (i am mostly concerned
about future code readability and maintainability). Note that after all, we're
solving a problem that exists in TestNG >= 6.3, and TestNG 5.x is not going to
change. The m_index field is used in TestNG 5.x when `preserve-order` is set,
but it's not possible to set it when invoking tests via surefire. More
precisely, `preserve-order` seems to require a suite file, but then TestNG will
populate the m_index, not us.
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