fix(partial): improve deep partial type to ensure compilation without errors when passing default values to create mock and create mock list

Partial deep source
https://github.com/sindresorhus/type-fest/blob/master/source/partial-deep.d.ts

Author: uittorio

src/create-mock-list.ts

@@ -1,11 +1,11 @@
 import { NoTransformerError } from './errors/no-transformer.error';
-import { DeepPartial } from './partial/deepPartial';
+import { PartialDeep } from './partial/partial';
 
 export function createMockList<T extends object>(
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
   quantity: number,
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
-  iterator?: (index: number) => DeepPartial<T>
+  iterator?: (index: number) => PartialDeep<T>
 ): T[] {
   throw new Error(NoTransformerError);
 }

src/create-mock.ts

@@ -1,7 +1,7 @@
 import { NoTransformerError } from './errors/no-transformer.error';
-import { DeepPartial } from './partial/deepPartial';
+import { PartialDeep } from './partial/partial';
 
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
-export function createMock<T extends object>(values?: DeepPartial<T>): T {
+export function createMock<T extends object>(values?: PartialDeep<T>): T {
   throw new Error(NoTransformerError);
 }

src/merge/merge.ts

@@ -1,14 +1,14 @@
 import { merge } from 'lodash-es';
-import { DeepPartial } from '../partial/deepPartial';
+import { PartialDeep } from '../partial/partial';
 
 export class Merge {
-  public static merge<T>(a: T, b: DeepPartial<T>): T {
+  public static merge<T>(a: T, b: PartialDeep<T>): T {
     return merge(a, b);
   }
 
   public static mergeIterator<T>(
     a: T,
-    b: (index: number) => DeepPartial<T>,
+    b: (index: number) => PartialDeep<T>,
     index: number
   ): T {
     return merge(a, b(index));

src/partial/deepPartial.ts

@@ -0,0 +1,46 @@
+type Primitive = null | undefined | string | number | boolean | symbol | bigint;
+
+export type PartialDeep<T> = T extends Primitive
+  ? Partial<T>
+  : T extends Map<infer KeyType, infer ValueType>
+  ? PartialMapDeep<KeyType, ValueType>
+  : T extends Set<infer ItemType>
+  ? PartialSetDeep<ItemType>
+  : T extends ReadonlyMap<infer KeyType, infer ValueType>
+  ? PartialReadonlyMapDeep<KeyType, ValueType>
+  : T extends ReadonlySet<infer ItemType>
+  ? PartialReadonlySetDeep<ItemType> // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  : T extends (...args: any[]) => unknown
+  ? T | undefined
+  : T extends object
+  ? PartialObjectDeep<T>
+  : unknown;
+
+/**
+ Same as `PartialDeep`, but accepts only `Map`s and  as inputs. Internal helper for `PartialDeep`.
+ */
+interface PartialMapDeep<KeyType, ValueType>
+  extends Map<PartialDeep<KeyType>, PartialDeep<ValueType>> {}
+
+/**
+ Same as `PartialDeep`, but accepts only `Set`s as inputs. Internal helper for `PartialDeep`.
+ */
+interface PartialSetDeep<T> extends Set<PartialDeep<T>> {}
+
+/**
+ Same as `PartialDeep`, but accepts only `ReadonlyMap`s as inputs. Internal helper for `PartialDeep`.
+ */
+interface PartialReadonlyMapDeep<KeyType, ValueType>
+  extends ReadonlyMap<PartialDeep<KeyType>, PartialDeep<ValueType>> {}
+
+/**
+ Same as `PartialDeep`, but accepts only `ReadonlySet`s as inputs. Internal helper for `PartialDeep`.
+ */
+interface PartialReadonlySetDeep<T> extends ReadonlySet<PartialDeep<T>> {}
+
+/**
+ Same as `PartialDeep`, but accepts only `object`s as inputs. Internal helper for `PartialDeep`.
+ */
+type PartialObjectDeep<ObjectType extends object> = {
+  [KeyType in keyof ObjectType]?: PartialDeep<ObjectType[KeyType]>;
+};