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ciphermask/test/unit-global/frozenPromise.test.js

53 lines
1.4 KiB

// Should occur before anything else
import './globalPatch';
import 'ses/lockdown';
import '../../app/scripts/lockdown-run';
import { strict as assert } from 'assert'; /* eslint-disable-line import/first,import/order */
describe('Promise global is immutable', function () {
it('throws when reassinging promise (syntax 1)', function () {
try {
// eslint-disable-next-line no-global-assign,no-native-reassign
Promise = {};
assert.fail('did not throw error');
} catch (err) {
assert.ok(err, 'did throw error');
}
});
it('throws when reassinging promise (syntax 2)', function () {
try {
global.Promise = {};
assert.fail('did not throw error');
} catch (err) {
assert.ok(err, 'did throw error');
}
});
it('throws when mutating existing Promise property', function () {
try {
Promise.all = () => undefined;
assert.fail('did not throw error');
} catch (err) {
assert.ok(err, 'did throw error');
}
});
it('throws when adding new Promise property', function () {
try {
Promise.foo = 'bar';
assert.fail('did not throw error');
} catch (err) {
assert.ok(err, 'did throw error');
}
});
it('throws when deleting Promise from global', function () {
try {
delete global.Promise;
assert.fail('did not throw error');
} catch (err) {
assert.ok(err, 'did throw error');
}
});
});