Add test case for passing canonical key in getOrInsertComputed

test/built-ins/Map/prototype/getOrInsertComputed/canonical-key-passed-to-callback.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2025 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-map.prototype.getorinsertcomputed
+description: |
+  Ensure the canonical key is passed to the callback function.
+info: |
+  Map.prototype.getOrInsertComputed ( key, callbackfn )
+
+  ...
+  4. Set key to CanonicalizeKeyedCollectionKey(key).
+  ...
+  6. Let value be ? Call(callbackfn, key).
+  ...
+
+  CanonicalizeKeyedCollectionKey ( key )
+
+  1. If key is -0𝔽, return +0𝔽.
+  2. Return key.
+features: [upsert]
+---*/
+
+for (var key of [-0, +0]) {
+  var map = new Map();
+
+  var canonicalKey;
+  map.getOrInsertComputed(key, function(keyArg) {
+    canonicalKey = keyArg;
+  });
+
+  assert.sameValue(+0, canonicalKey);
+}