mirror of
https://github.com/kremalicious/metamask-extension.git
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56 lines
1.2 KiB
JavaScript
56 lines
1.2 KiB
JavaScript
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/* eslint-disable no-native-reassign */
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// this is what we're testing
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require('../../app/scripts/lib/freezeGlobals')
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const assert = require('assert')
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describe('Promise global is immutable', () => {
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it('throws when reassinging promise (syntax 1)', () => {
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try {
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Promise = {}
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assert.fail('did not throw error')
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} catch (err) {
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assert.ok(err, 'did throw error')
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}
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})
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it('throws when reassinging promise (syntax 2)', () => {
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try {
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global.Promise = {}
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assert.fail('did not throw error')
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} catch (err) {
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assert.ok(err, 'did throw error')
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}
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})
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it('throws when mutating existing Promise property', () => {
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try {
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Promise.all = () => {}
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assert.fail('did not throw error')
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} catch (err) {
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assert.ok(err, 'did throw error')
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}
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})
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it('throws when adding new Promise property', () => {
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try {
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Promise.foo = 'bar'
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assert.fail('did not throw error')
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} catch (err) {
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assert.ok(err, 'did throw error')
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}
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})
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it('throws when deleting Promise from global', () => {
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try {
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delete global.Promise
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assert.fail('did not throw error')
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} catch (err) {
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assert.ok(err, 'did throw error')
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}
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})
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})
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