Add a test for .filter(Boolean) on array, containing void

total-typescript · Oct 13, 2023 · 390b10f · 390b10f
1 parent c416823
commit 390b10f
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/tests/filter-boolean.ts b/src/tests/filter-boolean.ts
@@ -38,3 +38,11 @@ doNotExecute(() => {
 
   type tests = [Expect<Equal<typeof result, never[]>>];
 });
+
+doNotExecute(() => {
+  const arr = [(x?: unknown) => 1, () => {}].map((fn) => fn());
+
+  const result = arr.filter(Boolean);
+
+  type tests = [Expect<Equal<typeof result, number[]>>];
+});