Improve tests

tests/Middleware/LoggerMiddlewareTest.php

@@ -134,13 +134,12 @@ public function testErrorLogLevelCanBeCustomized()
         $this->logger->shouldReceive('log')->with('info', 'received');
         $this->logger->shouldReceive('log')->with('emergency', 'failed');
 
+        $next = function () use (&$executed) {
+            throw new Exception('Command Failed');
+        };
+
         $this->setExpectedException(Exception::class, 'Command Failed');
 
-        $this->middleware->execute(
-            new TestCommand,
-            function () {
-                throw new Exception('Command Failed');
-            }
-        );
+        $this->middleware->execute(new TestCommand, $next);
     }
 }

tests/Middleware/TransactionMiddlewareTest.php

@@ -66,4 +66,20 @@ public function testCommandFailsWithErrorAndTransactionIsRolledBack()
 
         $this->middleware->execute(new TestCommand, $next);
     }
+
+    public function testNextCallableIsInvoked()
+    {
+        $this->database->shouldIgnoreMissing();
+
+        $sentCommand = new TestCommand;
+        $receivedSameCommand = false;
+
+        $next = function ($receivedCommand) use (&$receivedSameCommand, $sentCommand) {
+            $receivedSameCommand = ($receivedCommand === $sentCommand);
+        };
+
+        $this->middleware->execute($sentCommand, $next);
+
+        $this->assertTrue($receivedSameCommand);
+    }
 }