chore: Add the rest of the config builder test

lib/config/builder/list.ts

@@ -1,12 +1,6 @@
 import { BuilderExtract, IBuilder } from "./builder";
 import { Config } from "./config";
-import {
-  InputSpec,
-  ListValueSpecNumber,
-  ListValueSpecString,
-  UniqueBy,
-  ValueSpecList,
-} from "../config-types";
+import { InputSpec, ListValueSpecNumber, ListValueSpecString, UniqueBy, ValueSpecList } from "../config-types";
 import { guardAll } from "../../util";
 /**
  * Used as a subtype of Value.list
@@ -102,7 +96,8 @@ export class List<A extends ValueSpecList> extends IBuilder<A> {
       name: string;
       description?: string | null;
       warning?: string | null;
-      default: Record<string, unknown>[];
+      /** Default [] */
+      default?: Record<string, unknown>[];
       /** Default = "(\*,\*)" */
       range?: string;
     },
@@ -123,6 +118,7 @@ export class List<A extends ValueSpecList> extends IBuilder<A> {
     };
     const value = {
       spec,
+      default: [],
       ...a,
     };
     return new List({