fix(node): return false from vm.isContext (#21568)

https://github.com/denoland/deno/issues/20851#issuecomment-1779226106
for `jsdom`

1 files changed, 13 insertions, 1 deletions

diff --git a/cli/tests/unit_node/vm_test.ts b/cli/tests/unit_node/vm_test.ts
index c43495e1d..6f190ab08 100644
--- a/cli/tests/unit_node/vm_test.ts
+++ b/cli/tests/unit_node/vm_test.ts
@@ -1,5 +1,5 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-import { runInNewContext } from "node:vm";
+import { isContext, runInNewContext } from "node:vm";
 import {
   assertEquals,
   assertThrows,
@@ -55,3 +55,15 @@ Deno.test({
     }
   },
 });
+
+Deno.test({
+  name: "vm isContext",
+  fn() {
+    // Currently we do not expose VM contexts so this is always false.
+    const obj = {};
+    assertEquals(isContext(obj), false);
+    assertEquals(isContext(globalThis), false);
+    const sandbox = runInNewContext("{}");
+    assertEquals(isContext(sandbox), false);
+  },
+});