"Empty data set provided by data provider" #251
Description
Starting with PHPUnit 10 a dataprovider is not allowed to provide a empty array.
<?php use PHPUnit\Framework\Attributes\DataProvider; class BarTest extends PHPUnit\Framework\TestCase { /** * @dataProvider provideData */ #[DataProvider("provideData")] public function testBar() { self::assertTrue(true); } static public function provideData(): iterable { return []; } }real world example in phpstan-doctrine
PHPUnit 9 skips and warns
➜ phpunit git:(9.6) ✗ php phpunit BarTest.php PHPUnit 9.6.29-15-g3ee3d102e by Sebastian Bergmann and contributors. Runtime: PHP 8.3.27 Configuration: /Users/staabm/workspace/phpunit/phpunit.xml S 1 / 1 (100%) Time: 00:00.002, Memory: 6.00 MB There was 1 skipped test: 1) BarTest::testBar Test for BarTest::testBar skipped by data provider PHPUnit\Framework\SkippedTestError: <no message> /Users/staabm/workspace/phpunit/src/Util/Annotation/DocBlock.php:285 /Users/staabm/workspace/phpunit/src/Util/Test.php:329 /Users/staabm/workspace/phpunit/src/Framework/TestBuilder.php:72 /Users/staabm/workspace/phpunit/src/Framework/TestSuite.php:891 /Users/staabm/workspace/phpunit/src/Framework/TestSuite.php:232 /Users/staabm/workspace/phpunit/src/Runner/BaseTestRunner.php:133 /Users/staabm/workspace/phpunit/src/TextUI/Command.php:121 /Users/staabm/workspace/phpunit/src/TextUI/Command.php:99 /Users/staabm/workspace/phpunit/src/Framework/Assert.php:2895 /Users/staabm/workspace/phpunit/src/Framework/SkippedTestCase.php:66 /Users/staabm/workspace/phpunit/src/Framework/TestCase.php:1223 /Users/staabm/workspace/phpunit/src/Framework/TestResult.php:729 /Users/staabm/workspace/phpunit/src/Framework/TestCase.php:973 /Users/staabm/workspace/phpunit/src/Framework/TestSuite.php:685 /Users/staabm/workspace/phpunit/src/Framework/TestSuite.php:685 /Users/staabm/workspace/phpunit/src/TextUI/TestRunner.php:651 /Users/staabm/workspace/phpunit/src/TextUI/Command.php:146 /Users/staabm/workspace/phpunit/src/TextUI/Command.php:99 OK, but incomplete, skipped, or risky tests! Tests: 1, Assertions: 0, Skipped: 1.PHPUnit 10 errors
➜ phpunit git:(10.5) ✗ php phpunit BarTest.php PHPUnit 10.5.58-15-gc66b7d664 by Sebastian Bergmann and contributors. Runtime: PHP 8.3.27 Configuration: /Users/staabm/workspace/phpunit/phpunit.xml There was 1 PHPUnit error: 1) BarTest::testBar The data provider specified for BarTest::testBar is invalid Empty data set provided by data provider /Users/staabm/workspace/phpunit/src/Metadata/Api/DataProvider.php:76 /Users/staabm/workspace/phpunit/src/Framework/TestBuilder.php:44 /Users/staabm/workspace/phpunit/src/Framework/TestSuite.php:511 /Users/staabm/workspace/phpunit/src/Framework/TestSuite.php:139 /Users/staabm/workspace/phpunit/src/TextUI/Configuration/TestSuiteBuilder.php:122 /Users/staabm/workspace/phpunit/src/TextUI/Configuration/TestSuiteBuilder.php:58 /Users/staabm/workspace/phpunit/src/TextUI/Application.php:394 /Users/staabm/workspace/phpunit/src/TextUI/Application.php:114 /Users/staabm/workspace/phpunit/BarTest.php:11 -- There was 1 PHPUnit test runner warning: 1) No tests found in class "BarTest". No tests executed!PHPUnit11,12,13 errors
➜ phpunit git:(11.5) ✗ php phpunit BarTest.php PHPUnit 11.5.42-27-g32e5fd8bc by Sebastian Bergmann and contributors. Runtime: PHP 8.3.27 Configuration: /Users/staabm/workspace/phpunit/phpunit.xml There was 1 PHPUnit error: 1) BarTest::testBar The data provider specified for BarTest::testBar is invalid Empty data set provided by data provider /Users/staabm/workspace/phpunit/src/Metadata/Api/DataProvider.php:75 /Users/staabm/workspace/phpunit/src/Framework/TestBuilder.php:47 /Users/staabm/workspace/phpunit/src/Framework/TestSuite.php:508 /Users/staabm/workspace/phpunit/src/Framework/TestSuite.php:109 /Users/staabm/workspace/phpunit/src/TextUI/Configuration/TestSuiteBuilder.php:121 /Users/staabm/workspace/phpunit/src/TextUI/Configuration/TestSuiteBuilder.php:58 /Users/staabm/workspace/phpunit/src/TextUI/Application.php:412 /Users/staabm/workspace/phpunit/src/TextUI/Application.php:182 /Users/staabm/workspace/phpunit/BarTest.php:11 -- There was 1 PHPUnit test runner warning: 1) No tests found in class "BarTest". No tests executed!