add test

Author: rogerdz

app/code/Magento/Webapi/Controller/Rest/SynchronousRequestProcessor.php

@@ -97,7 +97,7 @@ public function process(\Magento\Framework\Webapi\Rest\Request $request)
             // phpcs:disable Magento2.Functions.DiscouragedFunction
             $outputData = call_user_func_array([$service, $serviceMethodName], $inputParams);
             // phpcs:enable Magento2.Functions.DiscouragedFunction
-        } catch (\Throwable $e) {
+        } catch (\TypeError $e) {
             throw new WebapiException(__($e->getMessage()));
         }
         $outputData = $this->serviceOutputProcessor->process(

dev/tests/api-functional/testsuite/Magento/Sales/Service/V1/ShipOrderTest.php

@@ -181,6 +181,23 @@ public function testShipOrder()
         );
     }
 
+    /**
+     * @magentoApiDataFixture Magento/Sales/_files/order_new.php
+     */
+    public function testShipOrderWithTypeError()
+    {
+        /** @var Order $existingOrder */
+        $existingOrder = $this->getOrder('100000001');
+
+        $requestData = [
+            'orderId' => $existingOrder->getId(),
+            'items' => "[]",
+        ];
+
+        $this->expectExceptionCode(400);
+        $this->_webApiCall($this->getServiceInfo($existingOrder), $requestData);
+    }
+
     /**
      * Tests that not providing a tracking number produces the correct error. See MAGETWO-95429
      * @codingStandardsIgnoreStart