test: add test for a vm indexed property

Adds a single test for a vm with an indexed property.

PR-URL: #23318
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: John-David Dalton <john.david.dalton@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>

test/parallel/test-vm-context-property-forwarding.js

@@ -32,3 +32,14 @@ assert.strictEqual(vm.runInContext('x;', ctx), 3);
 vm.runInContext('y = 4;', ctx);
 assert.strictEqual(sandbox.y, 4);
 assert.strictEqual(ctx.y, 4);
+
+// Test `IndexedPropertyGetterCallback` and `IndexedPropertyDeleterCallback`
+const x = { get 1() { return 5; } };
+const pd_expected = Object.getOwnPropertyDescriptor(x, 1);
+const ctx2 = vm.createContext(x);
+const pd_actual = Object.getOwnPropertyDescriptor(ctx2, 1);
+
+assert.deepStrictEqual(pd_actual, pd_expected);
+assert.strictEqual(ctx2[1], 5);
+delete ctx2[1];
+assert.strictEqual(ctx2[1], undefined);