Clean up tests

Author: vojtapol

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

@@ -40,23 +40,23 @@ class DirectiveTest {
             .build()
     }
 
-    class QueryResolver : GraphQLQueryResolver {
+    private class QueryResolver : GraphQLQueryResolver {
         fun books(): List<Book> {
             return listOf(Book(42L, "Test Book"))
         }
     }
 
-    data class Book(
+    private data class Book(
         val id: Long,
         val name: String
     )
 
-    enum class AllowedState {
+    private enum class AllowedState {
         ALLOWED,
         DISALLOWED
     }
 
-    class AllowedDirective : SchemaDirectiveWiring {
+    private class AllowedDirective : SchemaDirectiveWiring {
         override fun onField(environment: SchemaDirectiveWiringEnvironment<GraphQLFieldDefinition>): GraphQLFieldDefinition {
             val field = environment.element
 

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

@@ -141,7 +141,7 @@ class RelayConnectionTest {
         })
     }
 
-    class QueryResolver : GraphQLQueryResolver {
+    private class QueryResolver : GraphQLQueryResolver {
         fun users(first: Int?, after: String?, env: DataFetchingEnvironment): Connection<User> {
             return SimpleListConnection(listOf(User(1L, "Luke"))).get(env)
         }
@@ -151,16 +151,16 @@ class RelayConnectionTest {
         }
     }
 
-    data class User(
+    private data class User(
         val id: Long,
         val name: String
     )
 
-    data class AnotherType(
+    private data class AnotherType(
         val echo: String
     )
 
-    class UppercaseDirective : SchemaDirectiveWiring {
+    private class UppercaseDirective : SchemaDirectiveWiring {
 
         override fun onField(environment: SchemaDirectiveWiringEnvironment<GraphQLFieldDefinition>): GraphQLFieldDefinition {
             val field = environment.element