import '../../app/scripts/lib/freezeGlobals' import assert from 'assert' 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 = () => {} 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') } }) })