fix: it should apply Object.freeze on faked data for readonly

Author: Ernest

src/zod-readonly-faker.ts

@@ -4,6 +4,6 @@ import { ZodTypeFaker } from './zod-type-faker'
 
 export class ZodReadonlyFaker<T extends z.ZodReadonly<z.ZodTypeAny>> extends ZodTypeFaker<T> {
   fake(): z.infer<T> {
-    return fake(this.schema._def.innerType)
+    return Object.freeze(fake(this.schema._def.innerType))
   }
 }

tests/zod-readonly-faker.test.ts

@@ -2,6 +2,18 @@ import * as z from 'zod'
 import { install, fake } from '../src'
 import { expectType, TypeEqual } from 'ts-expect'
 
+test('freeze', () => {
+  const schema = z.object({ key: z.string() }).readonly()
+
+  install()
+  const data = fake(schema)
+
+  expect(() => {
+    // @ts-expect-error
+    data.key = 'b'
+  }).toThrow()
+})
+
 test('object', () => {
   const schema = z.object({ key: z.string() }).readonly()