Add coverage for max parameters of multipart

tweak mulripart tests

fix for loop initial from 0

http/http-advanced-reactive/src/test/java/io/quarkus/ts/http/advanced/reactive/BaseHttpAdvancedReactiveIT.java

@@ -23,6 +23,7 @@
 import static org.apache.http.HttpHeaders.ACCEPT_ENCODING;
 import static org.apache.http.HttpHeaders.ACCEPT_LANGUAGE;
 import static org.apache.http.HttpHeaders.CONTENT_TYPE;
+import static org.apache.http.HttpStatus.SC_INTERNAL_SERVER_ERROR;
 import static org.apache.http.HttpStatus.SC_NOT_FOUND;
 import static org.apache.http.HttpStatus.SC_OK;
 import static org.hamcrest.MatcherAssert.assertThat;
@@ -35,7 +36,6 @@
 import static org.htmlunit.util.MimeType.IMAGE_PNG;
 import static org.htmlunit.util.MimeType.TEXT_CSS;
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.nio.file.Paths;
 import java.time.Duration;
@@ -182,6 +182,46 @@ public void multipartFormDataReader() {
                 .body(TEXT, is(TEXT));
     }
 
+    @Test
+    @DisplayName("RESTEasy Reactive Multipart Max Parameters test")
+    public void multiPartFormDataMaxParametersAllowed() {
+        // We are going to reach the MAX_PARAMETERS_ALLOWED in Quarkus Multipart that it's 1000
+        final int PARAMETERS_TO_ADD = 998;
+        // The file itself it's one parameter to add also
+        var request = getApp().given().multiPart(FILE, Paths.get("src", "test", "resources", "file.txt").toFile());
+
+        for (int i = 0; i < PARAMETERS_TO_ADD; i++) {
+            request = request.multiPart("param" + i, "value" + i);
+        }
+        //  now we add the parameter TEXT with formParam, so we will get the max limit 1000
+        request.formParam(TEXT, TEXT);
+        request
+                .post(ROOT_PATH + MULTIPART_FORM_PATH)
+                .then()
+                .statusCode(SC_OK)
+                .body(FILE, is("File content"))
+                .body(TEXT, is(TEXT));
+
+    }
+
+    @DisplayName("RESTEasy Reactive Multipart Over the Max Parameters limit test")
+    @Test
+    public void exceedMultiPartParamsMaxLimit() {
+        // The file itself it's one parameter to add also
+        var request = getApp().given().multiPart(FILE, Paths.get("src", "test", "resources", "file.txt").toFile());
+        // We test the over the max limit of parameters defined by Quarkus that is 1000.
+        final int PARAMETERS_TO_ADD = 999;
+        for (int i = 0; i < PARAMETERS_TO_ADD; i++) {
+            request = request.multiPart("param" + i, "value" + i);
+        }
+        // we add the parameter TEXT with formParam so the total parameters will be 1000 + 1 so we are sending 1001
+        request.formParam(TEXT, TEXT);
+        request
+                .post(ROOT_PATH + MULTIPART_FORM_PATH)
+                .then()
+                .statusCode(SC_INTERNAL_SERVER_ERROR);
+    }
+
     @DisplayName("Jakarta REST RouterFilter and Vert.x Web Routes integration")
     @Test
     public void multipleResponseFilter() {