Renaming the variable to a propert expected variable name to compare with.

Author: kiettran

tests/GatewayTest.php

@@ -78,39 +78,39 @@ public function testFetchTransactionParameters(): void
      */
     public function testAuthorize(): void
     {
-        $gateway = $this->gateway->authorize($this->options);
+        $request = $this->gateway->authorize($this->options);
 
-        $this->assertInstanceOf(CreateTransactionRequest::class, $gateway);
+        $this->assertInstanceOf(CreateTransactionRequest::class, $request);
     }
 
     /**
      * Tests if Gateway::completeAuthorize will return an instance of TransactionStatusRequest.
      */
     public function testCompleteAuthorize(): void
     {
-        $gateway = $this->gateway->completeAuthorize($this->options);
+        $request = $this->gateway->completeAuthorize($this->options);
 
-        $this->assertInstanceOf(TransactionStatusRequest::class, $gateway);
+        $this->assertInstanceOf(TransactionStatusRequest::class, $request);
     }
 
     /**
      * Tests if Gateway::capture will return an instance of TransactionStatusRequest.
      */
     public function testCapture(): void
     {
-        $gateway = $this->gateway->capture($this->options);
+        $request = $this->gateway->capture($this->options);
 
-        $this->assertInstanceOf(TransactionStatusRequest::class, $gateway);
+        $this->assertInstanceOf(TransactionStatusRequest::class, $request);
     }
 
     /**
      * Tests if Gateway::refund will return an instance of RefundRequest.
      */
     public function testRefund(): void
     {
-        $gateway = $this->gateway->refund($this->options);
+        $request = $this->gateway->refund($this->options);
 
-        $this->assertInstanceOf(RefundRequest::class, $gateway);
+        $this->assertInstanceOf(RefundRequest::class, $request);
     }
 
     /**