Add a test for passing new Map() to a function that expects some ge…

…neric map
mattpocock · Sep 2, 2024 · 922f8a8 · 922f8a8
1 parent cc20e81
commit 922f8a8
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/tests/map-constructor.ts b/src/tests/map-constructor.ts
@@ -70,6 +70,14 @@ doNotExecute(() => {
   type test = [Expect<Equal<typeof map, Map<string, boolean>>>];
 });
 
+doNotExecute(() => {
+  function expectsBooleanMap(map: Map<string, boolean>) {
+    return map;
+  }
+  const map = expectsBooleanMap(new Map());
+  type test = [Expect<Equal<typeof map, Map<string, boolean>>>];
+});
+
 doNotExecute(() => {
   const map = new Map([
     ["foo", 1],