[9.x] Adds bootable traits to TestCase (#42394)

* Boot test traits

* use setUp

* fix test

Co-authored-by: Taylor Otwell <[email protected]>

Author: pascalbaljet

src/Illuminate/Foundation/Testing/TestCase.php

@@ -143,6 +143,14 @@ protected function setUpTraits()
             $this->setUpFaker();
         }
 
+        foreach ($uses as $trait) {
+            $method = 'setUp'.class_basename($trait);
+
+            if (method_exists($this, $method)) {
+                $this->{$method}();
+            }
+        }
+
         return $uses;
     }
 

tests/Foundation/Testing/BootTraitsTest.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Illuminate\Tests\Foundation\Testing;
+
+use Illuminate\Foundation\Testing\TestCase as FoundationTestCase;
+use Orchestra\Testbench\Concerns\CreatesApplication;
+use PHPUnit\Framework\TestCase;
+
+trait TestTrait
+{
+    public $booted = false;
+
+    public function setUpTestTrait()
+    {
+        $this->booted = true;
+    }
+}
+
+class TestCaseWithTrait extends FoundationTestCase
+{
+    use CreatesApplication;
+    use TestTrait;
+}
+
+class BootTraitsTest extends TestCase
+{
+    public function testSetUpTraitsWithBootMethod()
+    {
+        $testCase = new TestCaseWithTrait;
+
+        $method = new \ReflectionMethod(get_class($testCase), 'setUpTraits');
+        tap($method)->setAccessible(true)->invoke($testCase);
+
+        $this->assertTrue($testCase->booted);
+    }
+}