Test class loaded during data provider execution is not discovered

[kubawerlos]

Q	A
PHPUnit version	6.4.3
PHP version	7.1.11
Installation Method	Composer

Having 2 test cases:

<?php

class ATest extends \PHPUnit\Framework\TestCase
{
    /**
     * @dataProvider provide
     */
    public function testNothingA($x)
    {
        $this->assertTrue($x);
    }

    public function provide() : array
    {
        $a = new \ReflectionClass(BTest::class);

        return [[true]];
    }
}

and

<?php

class BTest extends \PHPUnit\Framework\TestCase
{
    public function testNothingB()
    {
        $this->assertTrue(false);
    }
}

running them will result with executing only ATest.

It's not even listed:

vendor/bin/phpunit --list-tests
PHPUnit 6.4.3 by Sebastian Bergmann and contributors.

Available test(s):
 - Tests\ATest::testNothingA#0

After removing $a = new \ReflectionClass(BTest::class); or moving this line to testNothingA both classes will be executed. The problem is only with data provider.

[sebastianbergmann]

#2834 was reverted due to #2859

[kubawerlos]

So I use my test case from the first solution plus the test from #2859 (comment) and try again, right?

[sebastianbergmann]

Yes, please.

[keradus]

at PHP CS Fixer, we come across this issue as well. it will be great to addition to have this solved!
would be really great to have it solved 👍
big 👍 for one actually working on it, we are with you @kubawerlos !