phpunit.dataProviderPublic - Phpstan

Code example

php

<?php declare(strict_types = 1);

use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\TestCase;

class MyTest extends TestCase
{
	#[DataProvider('provideData')]
	public function testFoo(int $value): void
	{
		$this->assertGreaterThan(0, $value);
	}

	private function provideData(): array
	{
		return [[1], [2], [3]];
	}
}

Why is it reported?

This rule is part of phpstan-phpunit.

A #[DataProvider] attribute references a method that is not public. PHPUnit requires data provider methods to be public so that the test runner can access them.

How to fix it

Change the data provider method's visibility to public:

diff-php

-	private function provideData(): array
+	public function provideData(): array
 	{
 		return [[1], [2], [3]];
 	}