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node/test/parallel/test-vm-is-context.js

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test: enable linting for tests Enable linting for the test directory. A number of changes was made so all tests conform the current rules used by lib and src directories. The only exception for tests is that unreachable (dead) code is allowed. test-fs-non-number-arguments-throw had to be excluded from the changes because of a weird issue on Windows CI. PR-URL: https://github.com/nodejs/io.js/pull/1721 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
10 years ago
'use strict';
test: remove unnecessary assignments common.js needs to be loaded in all tests so that there is checking for variable leaks and possibly other things. However, it does not need to be assigned to a variable if nothing in common.js is referred to elsewhere in the test. PR-URL: https://github.com/nodejs/node/pull/4408 Reviewed-By: James M Snell <jasnell@gmail.com>
9 years ago
require('../common');
test: use const for all require() calls PR-URL: https://github.com/nodejs/node/pull/10550 Reviewed-By: Rich Trott <rtrott@gmail.com>
8 years ago
const assert = require('assert');
const vm = require('vm');
vm: add isContext; prevent double-contextifying Previously, calling `vm.createContext(o)` repeatedly on the same `o` would cause new C++ `ContextifyContext`s to be created and stored on `o`, while the previous resident went off into leaked-memory limbo. Now, repeatedly trying to contextify a sandbox will do nothing after the first time. To detect this, an independently-useful `vm.isContext(sandbox)` export was added.
12 years ago
assert.throws(function() {
vm.isContext('string is not supported');
}, TypeError);
assert.strictEqual(vm.isContext({}), false);
assert.strictEqual(vm.isContext([]), false);
assert.strictEqual(vm.isContext(vm.createContext()), true);
assert.strictEqual(vm.isContext(vm.createContext([])), true);
var sandbox = { foo: 'bar' };
vm.createContext(sandbox);
assert.strictEqual(vm.isContext(sandbox), true);