testng: Incorrect listener's onStart(ISuite suite) execution order in case of inner suites

TestNG Version

Note: only the latest version is supported

6.11

Expected behavior

The listener is called for each suite, if the parent suite contains child suites then the parent suites should run first before running the child suite.

Actual behavior

The child suites are first run before running the parent suite.

Is the issue reproducible on runner?

• Shell
• Maven
• Gradle
• Ant
• Eclipse
• IntelliJ
• NetBeans

Test case sample

<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="ParentSuite" parallel="classes" thread-count="10">

    <suite-files>
        <suite-file path="child_suite.xml"/>
    </suite-files>

    <test verbose="1" name="SomeTest">
        <classes>
            <class name="com.example.SomeTest"/>
        </classes>
    </test>

</suite>