Add test on generated schema

Author: Johan ROUVE

src/test/kotlin/graphql/kickstart/tools/EndToEndTest.kt

@@ -532,6 +532,21 @@ class EndToEndTest {
         assertEquals(data["dataFetcherResult"], mapOf("name" to "item1"))
     }
 
+    @Test
+    fun `generated schema supports list of DataFetcherResult`() {
+        val data = assertNoGraphQlErrors(gql) {
+            """
+            {
+                dataFetcherResultItems {
+                    name
+                }
+            }
+            """
+        }
+
+        assertEquals(data["dataFetcherResultItems"], listOf(mapOf("name" to "item1")))
+    }
+
     @Test
     fun `generated schema supports Kotlin suspend functions`() {
         val data = assertNoGraphQlErrors(gql) {