add collection query param method

Author: SentryMan

http-client/src/main/java/io/avaje/http/client/HttpClientRequest.java

@@ -245,6 +245,17 @@ public interface HttpClientRequest {
    */
   HttpClientRequest queryParam(Map<String, ?> params);
 
+  /**
+   * Add a query parameter with multiple values
+   *
+   * @param name The name of the query parameter
+   * @param value The values of the query parameter which can be null
+   * @return The request being built
+   */
+  default HttpClientRequest queryParam(String name, Collection<String> values) {
+    return queryParam(name, values);
+  }
+
   /**
    * Add a form parameter.
    *

http-client/src/test/java/io/avaje/http/client/HelloControllerTest.java

@@ -801,7 +801,7 @@ void async_list_as() throws ExecutionException, InterruptedException {
   void get_withPathParamAndQueryParam_returningBean() {
 
     final HelloDto dto = clientContext.request()
-      .path("hello/43/2020-03-05").queryParam("otherParam", "other").queryParam("foo", null)
+      .path("hello/43/2020-03-05").queryParam("otherParam", "other").queryParam("foo", (Object) null)
       .GET()
       .bean(HelloDto.class);
 
@@ -813,7 +813,7 @@ void get_withPathParamAndQueryParam_returningBean() {
   @Test
   void callBean() {
     final HelloDto dto = clientContext.request()
-      .path("hello/43/2020-03-05").queryParam("otherParam", "other").queryParam("foo", null)
+      .path("hello/43/2020-03-05").queryParam("otherParam", "other").queryParam("foo", (Object) null)
       .GET()
       .call().bean(HelloDto.class).execute();
 
@@ -825,7 +825,7 @@ void callBean() {
   @Test
   void callBeanAsync() throws ExecutionException, InterruptedException {
     final CompletableFuture<HelloDto> future = clientContext.request()
-      .path("hello/43/2020-03-05").queryParam("otherParam", "other").queryParam("foo", null)
+      .path("hello/43/2020-03-05").queryParam("otherParam", "other").queryParam("foo", (String) null)
       .GET()
       .call().bean(HelloDto.class).async();
 
@@ -842,7 +842,7 @@ void async_whenComplete_returningBean() throws ExecutionException, InterruptedEx
     final AtomicReference<HelloDto> ref = new AtomicReference<>();
 
     final CompletableFuture<HelloDto> future = clientContext.request()
-      .path("hello/43/2020-03-05").queryParam("otherParam", "other").queryParam("foo", null)
+      .path("hello/43/2020-03-05").queryParam("otherParam", "other").queryParam("foo", (String) null)
       .GET()
       .async().bean(HelloDto.class);
 
@@ -872,7 +872,7 @@ void async_whenComplete_returningBeanWithHeaders() throws ExecutionException, In
     final AtomicReference<HttpResponse<HelloDto>> ref = new AtomicReference<>();
 
     final CompletableFuture<HttpResponse<HelloDto>> future = clientContext.request()
-      .path("hello/43/2020-03-05").queryParam("otherParam", "other").queryParam("foo", null)
+      .path("hello/43/2020-03-05").queryParam("otherParam", "other").queryParam("foo", (String) null)
       .GET()
       .async().as(HelloDto.class);