Test same-type attribute providers don't warn

Author: staabm

tests/end-to-end/_files/TestDataProviderExternalAndDataProviderTest.php

@@ -0,0 +1,35 @@
+<?php declare(strict_types=1);
+
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace PHPUnit\TestFixture;
+
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\DataProviderExternal;
+use PHPUnit\Framework\TestCase;
+
+final class TestDataProviderExternalAndDataProviderTest extends TestCase
+{
+    public static function externalProvider(): iterable
+    {
+        yield 'foo' => ['bar', 'baz'];
+    }
+
+    public static function provider(): iterable
+    {
+        yield 'foo2' => ['bar', 'baz'];
+    }
+
+    #[DataProvider('provider')]
+    #[DataProviderExternal(self::class, 'externalProvider')]
+    public function testWithDifferentProviderTypes($one, $two): void
+    {
+        $this->assertTrue(true);
+    }
+}

tests/end-to-end/metadata/mix-attribute-dataproviders.phpt

@@ -0,0 +1,21 @@
+--TEST--
+phpunit ../_files/TestDataProviderExternalAndDataProviderTest.php
+--FILE--
+<?php declare(strict_types=1);
+$_SERVER['argv'][] = '--do-not-cache-result';
+$_SERVER['argv'][] = '--no-configuration';
+$_SERVER['argv'][] = __DIR__ . '/../_files/TestDataProviderExternalAndDataProviderTest.php';
+
+require __DIR__ . '/../../bootstrap.php';
+
+(new PHPUnit\TextUI\Application)->run($_SERVER['argv']);
+--EXPECTF--
+PHPUnit %s by Sebastian Bergmann and contributors.
+
+Runtime: %s
+
+..                                                                  2 / 2 (100%)
+
+Time: %s, Memory: %s
+
+OK (2 tests, 2 assertions)