first

tests/PHPUnit/CustomTestCase/CustomTestCase.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\CustomTestCase;
+
+use function PHPUnit\Framework\assertTrue;
+use PHPUnit\Framework\TestCase;
+
+class CustomTestCase extends TestCase
+{
+    public function assertCustomTrue()
+    {
+        assertTrue(true);
+    }
+}

tests/PHPUnit/CustomTestCase/PhpunitTest.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\CustomTestCase;
+
+use function PHPUnit\Framework\assertTrue;
+use PHPUnit\Framework\TestCase;
+
+class PhpunitTest extends TestCase
+{
+    public static $executed = false;
+
+    /** @test */
+    public function testThatGetsExecuted(): void
+    {
+        self::$executed = true;
+
+        $this->assertTrue(true);
+    }
+}
+
+// register_shutdown_function(fn () => assertTrue(PhpunitTest::$executed));

tests/PHPUnit/CustomTestCase/UsesPerDirectory.php

@@ -0,0 +1,7 @@
+<?php
+
+uses(Tests\CustomTestCase\CustomTestCase::class)->in(__DIR__);
+
+test('closure was bound to CustomTestCase', function () {
+    $this->assertCustomTrue();
+});