wip

Author: Victor LOIZEL

src/main/java/issue/spring/graphql/objectlist/BusinessEntityController.java

@@ -13,4 +13,9 @@ public class BusinessEntityController {
     public boolean filterValueIsInstanceOfList(@Argument BusinessEntityFilterInput filter) {
         return filter.getValue() instanceof List;
     }
+
+    @QueryMapping
+    public boolean inputIsInstanceOfList(@Argument Object object) {
+        return object instanceof List;
+    }
 }

src/main/resources/graphql/schema.graphqls

@@ -6,6 +6,7 @@ schema {
 
 type Query {
     filterValueIsInstanceOfList(filter: EntityFilterInput!): Boolean
+    inputIsInstanceOfList(object: Object!): Boolean
 }
 
 input EntityFilterInput {

src/test/java/issue/spring/graphql/objectlist/BusinessEntityControllerTests.java

@@ -65,4 +65,17 @@ void filterValueIsInstanceOfList_withException() {
                 .entity(Boolean.class)
                 .isEqualTo(true);
     }
+
+    /**
+     * Works, the input is an instance of {@link List}
+     */
+    @Test
+    void inputIsInstanceOfList_listValue() {
+        this.graphQlTester.documentName("inputIsInstanceOfList")
+                .variable("object", List.of("value1", "value2"))
+                .execute()
+                .path("inputIsInstanceOfList")
+                .entity(Boolean.class)
+                .isEqualTo(true);
+    }
 }

src/test/resources/graphql-test/inputIsInstanceOfList.graphql

@@ -0,0 +1,3 @@
+query inputIsInstanceOfList($object: Object!) {
+    inputIsInstanceOfList(object: $object)
+}