fix default command type in subcommand

Author: sigmaSd

deno.json

@@ -1,6 +1,6 @@
 {
   "name": "@sigma/parse",
-  "version": "0.51.0",
+  "version": "0.52.0",
   "exports": "./mod.ts",
   "license": "MIT",
   "tasks": {

src/types.ts

@@ -156,7 +156,7 @@ export interface ParseOptions {
  */
 export interface CommandOptions {
   /** Default command to run when no arguments are provided to this subcommand */
-  defaultCommand?: "help";
+  defaultCommand?: string | "help";
 }
 
 /**

tests/index_extra.test.ts

@@ -188,3 +188,24 @@ Deno.test("subcommand with custom description in @subCommand", () => {
   // This covers some merging logic in executeSubCommand
   App.parse(["sub"]);
 });
+
+Deno.test("subcommand with string defaultCommand (points to another subcommand)", () => {
+  @command
+  class List2 {}
+
+  @command({ defaultCommand: "list2" })
+  class List {
+    @subCommand(List2)
+    list2?: List2;
+  }
+
+  @cli({ name: "app" })
+  class App extends Args {
+    @subCommand(List)
+    list?: List;
+  }
+
+  const result = App.parse(["list"]);
+  assertEquals(result.list instanceof List, true);
+  assertEquals(result.list?.list2 instanceof List2, true);
+});