feat(#114): finish IsDeepNonRequired<T>

AshGw · Apr 26, 2024 · 2891b4d · 2891b4d
1 parent f85b154
commit 2891b4d
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Showing 2 changed files with 19 additions and 0 deletions.
diff --git a/src/index.ts b/src/index.ts
@@ -1675,6 +1675,19 @@ export type DeepNonRequired<T> = T extends UnknownFunction
   : {
       [K in Keys<T>]+?: IfExtends<T[K], unknown, DeepNonRequired<T[K]>, T[K]>;
     };
+
+/**
+ * Check if all the properties of a given object (nested) are non required
+ * @returns
+ * `true` if all the properties are, otherwise `false`
+ */
+export type IsDeepNonRequired<T> = IfExtends<
+  T,
+  DeepNonRequired<T>,
+  true,
+  false
+>;
+
 /**
  * @hidden
  */

diff --git a/tests/deep-non-required.test.ts b/tests/deep-non-required.test.ts
@@ -3,6 +3,7 @@ import {
   DeepNonRequired,
   Primitive,
   Maybe,
+  IsDeepNonRequired,
   Nullable,
   TestType,
 } from 'src';
@@ -46,3 +47,8 @@ test('_', () => {
   const result: TestType<DeepNonRequired<Actual>, Expected, true> = true;
   expect(result).toBe(true);
 });
+
+test('_', () => {
+  const result: TestType<IsDeepNonRequired<Expected>, true, true> = true;
+  expect(result).toBe(true);
+});