(fix/reuse-fragments) New test case for issue with implementing not existing classes (#438)

* test: issue_with_implementing_not_existing_classes

* fix imports

* a little bit more familiar names of fields

* generate code without reuse-fragments

Author: LiLatee

codegen/end_to_end_test/lib/graphql/__generated__/schema.ast.gql.dart

@@ -211,3 +211,28 @@ scalar ISODate
 scalar CustomField
 
 scalar Json
+
+### START - issue_with_implementing_not_existing_classes
+type Connection {
+  field1: [Field1Edge!]!
+  field2: Field2!
+}
+
+type Field1Edge {
+  field11: Field11!
+}
+
+type Field1 {
+  field11: Field11
+}
+
+type Field11 {
+  field111: Field111!
+}
+
+type Field111 {
+}
+
+type Field2 {
+}
+### END - issue_with_implementing_not_existing_classes