feat: Add assertServerError. (#44619)

Author: xiCO2k

src/Illuminate/Testing/TestResponse.php

@@ -165,6 +165,21 @@ public function assertUnprocessable()
         return $this->assertStatus(422);
     }
 
+    /**
+     * Assert that the response is a server error.
+     *
+     * @return $this
+     */
+    public function assertServerError()
+    {
+        PHPUnit::assertTrue(
+            $this->isServerError(),
+            $this->statusMessageWithDetails('>=500, < 600', $this->getStatusCode())
+        );
+
+        return $this;
+    }
+
     /**
      * Assert that the response has the given status code.
      *

tests/Testing/TestResponseTest.php

@@ -580,6 +580,18 @@ public function testAssertUnprocessable()
         $response->assertUnprocessable();
     }
 
+    public function testAssertServerError()
+    {
+        $statusCode = 500;
+
+        $baseResponse = tap(new Response, function ($response) use ($statusCode) {
+            $response->setStatusCode($statusCode);
+        });
+
+        $response = TestResponse::fromBaseResponse($baseResponse);
+        $response->assertServerError();
+    }
+
     public function testAssertNoContentAsserts204StatusCodeByDefault()
     {
         $statusCode = 500;