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test/parallel/test-vm-global-assignment.js

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+'use strict';
+// Regression test for https://github.com/nodejs/node/issues/10806
+
+require('../common');
+const assert = require('assert');
+const vm = require('vm');
+const ctx = vm.createContext({ open() { } });
+const window = vm.runInContext('this', ctx);
+const other = 123;
+
+assert.notStrictEqual(window.open, other);
+window.open = other;
+assert.strictEqual(window.open, other);
+window.open = other;
+assert.strictEqual(window.open, other);