Fix tests

Author: Denis-Averin

src/main/java/com/aspose/barcode/cloud/ApiClient.java

@@ -680,7 +680,10 @@ public <T> T handleResponse(Response response, Type returnType) throws ApiExcept
                     response.message(), e, response.code(), response.headers().toMultimap());
         }
 
-        throw new ApiException(response.message(), response.code(), errorResponse);
+        throw new ApiException(
+                response.message().isEmpty() ? String.valueOf(response.code()) : response.message(),
+                response.code(),
+                errorResponse);
     }
 
     /**

src/test/java/com/aspose/barcode/cloud/test/ExceptionTest.java

@@ -31,7 +31,7 @@ public void ExceptionMessageParsed() {
         } catch (ApiException e) {
             thrown = true;
             assertEquals(400, e.getHttpCode());
-            assertEquals("com.aspose.barcode.cloud.ApiException: Bad Request", e.toString());
+            assertEquals("com.aspose.barcode.cloud.ApiException: 400", e.toString());
             assertEquals(
                     "errorInvalidInputData: Barcode.Text is not provided.\n"
                             + "Operation Failed. The input data is not valid.",