From 3e941ac194f54d08df23c912f22b3801d2a8fb86 Mon Sep 17 00:00:00 2001
From: unional <homawong@gmail.com>
Date: Tue, 12 Sep 2023 12:38:55 -0700
Subject: [PATCH] test: add more ArrayPlus.Filter tests

---
 type-plus/ts/array/array_plus.filter.spec.ts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/type-plus/ts/array/array_plus.filter.spec.ts b/type-plus/ts/array/array_plus.filter.spec.ts
index e5a50b0996..11a8e6c1d8 100644
--- a/type-plus/ts/array/array_plus.filter.spec.ts
+++ b/type-plus/ts/array/array_plus.filter.spec.ts
@@ -12,3 +12,12 @@ it('can override never case', () => {
 it('can override not array case', () => {
 	testType.equal<ArrayPlus.Filter<[], string, { $notArray: 1 }>, 1>(true)
 })
+
+it('filter type within the array matching the criteria', () => {
+	testType.equal<ArrayPlus.Filter<Array<string | undefined>, string>, string[]>(true)
+})
+
+it('defaults to match true', () => {
+	testType.equal<ArrayPlus.Filter<Array<string | true | undefined>>, true[]>(true)
+	testType.equal<ArrayPlus.Filter<Array<string | boolean | undefined>>, true[]>(true)
+})