Execute mutatation to verify NestedInputTypes

Author: oliemansm

src/test/groovy/com/coxautodev/graphql/tools/NestedInputTypesSpec.groovy

@@ -1,12 +1,15 @@
 package com.coxautodev.graphql.tools
 
+import graphql.GraphQL
+import graphql.execution.AsyncExecutionStrategy
+import graphql.schema.GraphQLSchema
 import spock.lang.Specification
 
 class NestedInputTypesSpec extends Specification {
 
     def "nested input types are parsed"() {
         when:
-            SchemaParser.newParser().schemaString('''\
+            GraphQLSchema schema = SchemaParser.newParser().schemaString('''\
                         type Query {
                             materials(filter: MaterialFilter): [Material!]!
                         }
@@ -31,9 +34,23 @@ class NestedInputTypesSpec extends Specification {
                         }
                     ''').resolvers(new QueryResolver())
                     .build()
+                    .makeExecutableSchema()
+            GraphQL gql = GraphQL.newGraphQL(schema)
+                    .queryExecutionStrategy(new AsyncExecutionStrategy())
+                    .build()
+            def data = Utils.assertNoGraphQlErrors(gql, [filter: [title: "title", requestFilter: [discountTypeFilter: [name: "discount"]]]]) {
+                '''
+                query materials($filter: MaterialFilter!) {
+                    materials(filter: $filter) {
+                        id
+                    }
+                }
+                '''
+            }
 
         then:
             noExceptionThrown()
+            data.materials == []
     }
 
     class QueryResolver implements GraphQLQueryResolver {
@@ -44,18 +61,18 @@ class NestedInputTypesSpec extends Specification {
         Long id
     }
 
-    class MaterialFilter {
+    static class MaterialFilter {
         String title
         RequestFilter requestFilter
     }
 
-    class RequestFilter {
+    static class RequestFilter {
         List<RequestFilter> and
         List<RequestFilter> or
         DiscountTypeFilter discountTypeFilter
     }
 
-    class DiscountTypeFilter {
+    static class DiscountTypeFilter {
         String name
     }
 }