# PHPUnit 10.5.20 由 Sebastian Bergmann 和贡献者编写。运行时：PHP 8.2.17 配置：/var/www/app/phpunit.xml 警告 - 为 Tests\Unit\OrderTest::testDiscount 指定的数据提供者无效。数据提供者方法 Tests\Unit\OrderTest::discountProvider() 不可调用或未返回数组的数组。

- **ID:** `php/phpunit-dataprovider-invalid-return`
- **领域:** php
- **类别:** test_error
- **验证级别:** ai_generated
- **修复率:** 90%

## 根因

@dataProvider 注解引用的方法要么不存在，要么不是静态的（在 PHPUnit 10+ 中），要么返回非可迭代值（例如 null、字符串）而不是数组的数组。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| PHPUnit 10.5.20 | active | — | — |
| PHPUnit 11.0.1 | active | — | — |
| PHP 8.2.17 | active | — | — |

## 解决方案

1. ```
   Ensure the data provider method is declared as public static and returns an array of arrays: public static function discountProvider(): array { return [[10, 5], [20, 10]]; }
   ```
2. ```
   If using PHPUnit 10+, use PHPUnit\Framework\Attributes\DataProvider attribute instead of annotation: #[DataProvider('discountProvider')] public function testDiscount($price, $expected) { ... }
   ```

## 无效尝试

- **** — Making the data provider method non-static and using @dataProvider on an instance method works in PHPUnit 9 but fails in PHPUnit 10+ which requires static data providers. (80% 失败率)
- **** — Returning a single associative array like ['discount' => 10] instead of an array of arrays [[10], [20]] causes PHPUnit to treat each key as a separate test case, often leading to unexpected failures. (70% 失败率)