Better error message when data provider is invalid

[staabm]

running php phpunit repro.php

with repro.php

<?php

final class repro extends \PHPUnit\Framework\TestCase
{
    /**
     * @return iterable<string>
     */
    public static function dataFile(): iterable
    {
        yield __DIR__ . '/data/preg-match.php';
        yield __DIR__ . '/data/preg-match-all.php';
    }

    /**
     * @dataProvider dataFile
     */
    public function testFile(string $file): void
    {
        self::assertTrue(true);
    }
}

I get

$ php phpunit repro.php
PHPUnit 11.4-gba61e62d4 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.2.12
Configuration: C:\dvl\Workspace\phpunit\phpunit.xml

There was 1 PHPUnit error:

1) repro::testFile
The data provider specified for repro::testFile is invalid
Data set #0 is invalid
C:\dvl\Workspace\phpunit\src\Metadata\Api\DataProvider.php:80
C:\dvl\Workspace\phpunit\src\Framework\TestBuilder.php:43
C:\dvl\Workspace\phpunit\src\Framework\TestSuite.php:514
C:\dvl\Workspace\phpunit\src\Framework\TestSuite.php:109
C:\dvl\Workspace\phpunit\src\TextUI\Configuration\TestSuiteBuilder.php:121
C:\dvl\Workspace\phpunit\src\TextUI\Configuration\TestSuiteBuilder.php:58
C:\dvl\Workspace\phpunit\src\TextUI\Application.php:412
C:\dvl\Workspace\phpunit\src\TextUI\Application.php:180

C:\dvl\Workspace\phpunit\repro.php:19

--

There was 1 PHPUnit test runner warning:

1) No tests found in class "repro".

I think DX wise I would expect a more meaningful error then

Data set #0 is invalid

maybe something like

Data set #0 is invalid, expected X got Y.

[staabm]

I am on it