phpunit.dataProviderMethod - 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 testSomething(string $value): void
	{
		self::assertNotEmpty($value);
	}

	public static function provideItems(): iterable
	{
		yield ['foo'];
	}
}

Why is it reported?

The #[DataProvider] attribute or @dataProvider annotation references a method that does not exist on the test class. PHPUnit will fail at runtime when it cannot find the data provider method.

How to fix it

Ensure the data provider method name matches exactly:

diff-php

-#[DataProvider('provideData')]
+#[DataProvider('provideItems')]
 public function testSomething(string $value): void
 {
 	self::assertNotEmpty($value);
 }

Or create the missing method:

diff-php

+public static function provideData(): iterable
+{
+	yield ['foo'];
+}