Tweaked tests

Author: GrahamCampbell

tests/HttpClient/Message/ResponseMediatorTest.php

@@ -7,7 +7,7 @@
 use Gitlab\Exception\RuntimeException;
 use Gitlab\HttpClient\Message\ResponseMediator;
 use GuzzleHttp\Psr7\Response;
-use function GuzzleHttp\Psr7\stream_for;
+use GuzzleHttp\Psr7\Utils;
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -21,7 +21,7 @@ public function testGetContent(): void
         $response = new Response(
             200,
             ['Content-Type' => 'application/json'],
-            stream_for('{"foo": "bar"}')
+            Utils::streamFor('{"foo": "bar"}')
         );
 
         $this->assertSame(['foo' => 'bar'], ResponseMediator::getContent($response));
@@ -32,7 +32,7 @@ public function testGetContentNotJson(): void
         $response = new Response(
             200,
             [],
-            stream_for('foobar')
+            Utils::streamFor('foobar')
         );
 
         $this->assertSame('foobar', ResponseMediator::getContent($response));
@@ -43,7 +43,7 @@ public function testGetContentInvalidJson(): void
         $response = new Response(
             200,
             ['Content-Type' => 'application/json'],
-            stream_for('foobar')
+            Utils::streamFor('foobar')
         );
 
         $this->expectException(RuntimeException::class);
@@ -57,7 +57,7 @@ public function testGetErrrorMessageInvalidJson(): void
         $response = new Response(
             200,
             ['Content-Type' => 'application/json'],
-            stream_for('foobar')
+            Utils::streamFor('foobar')
         );
 
         $this->assertNull(ResponseMediator::getErrorMessage($response));