fix: fixed shape#array types (#146)

sapphiredev · Jul 7, 2022 · 43016a0 · 43016a0
1 parent 5f26e32
commit 43016a0
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Showing 2 changed files with 5 additions and 3 deletions.
diff --git a/src/lib/Shapes.ts b/src/lib/Shapes.ts
@@ -94,7 +94,7 @@ export class Shapes {
 		return new UnionValidator(validators);
 	}
 
-	public array<T>(validator: BaseValidator<T>) {
+	public array<T extends unknown[]>(validator: BaseValidator<T[number]>) {
 		return new ArrayValidator(validator);
 	}
 

diff --git a/tests/validators/base.test.ts b/tests/validators/base.test.ts
@@ -60,13 +60,15 @@ describe('BaseValidator', () => {
 		const numberArrayPredicate = s.number.array;
 		const input = [1, 2, 3];
 
-		test('GIVEN an array of string THEN returns the given value', () => {
+		test('GIVEN an array of number THEN returns the given value', () => {
 			expect<number[]>(numberArrayPredicate.parse(input)).toStrictEqual(input);
 		});
 
-		test('GIVEN s.string.array THEN returns s.array(s.string)', () => {
+		test('GIVEN s.number.array THEN returns s.array(s.number)', () => {
 			const arrayNumberPredicate = s.array(s.number);
 
+			expect<number[]>(numberArrayPredicate.parse([1])).toStrictEqual([1]);
+			expect<number[]>(arrayNumberPredicate.parse([1, 2, 3])).toStrictEqual([1, 2, 3]);
 			expectClonedValidator(numberArrayPredicate, arrayNumberPredicate);
 		});
 	});