122 lines
4.3 KiB
JavaScript
122 lines
4.3 KiB
JavaScript
/**
|
|
* Copyright (c) 2013-present, Facebook, Inc.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*
|
|
* @emails oncall+react_native
|
|
*/
|
|
var deepFreezeAndThrowOnMutationInDev = require('deepFreezeAndThrowOnMutationInDev');
|
|
|
|
describe('deepFreezeAndThrowOnMutationInDev', function() {
|
|
|
|
it('should be a noop on non object values', () => {
|
|
__DEV__ = true;
|
|
expect(() => deepFreezeAndThrowOnMutationInDev('')).not.toThrow();
|
|
expect(() => deepFreezeAndThrowOnMutationInDev(null)).not.toThrow();
|
|
expect(() => deepFreezeAndThrowOnMutationInDev(false)).not.toThrow();
|
|
expect(() => deepFreezeAndThrowOnMutationInDev(5)).not.toThrow();
|
|
expect(() => deepFreezeAndThrowOnMutationInDev()).not.toThrow();
|
|
__DEV__ = false;
|
|
expect(() => deepFreezeAndThrowOnMutationInDev('')).not.toThrow();
|
|
expect(() => deepFreezeAndThrowOnMutationInDev(null)).not.toThrow();
|
|
expect(() => deepFreezeAndThrowOnMutationInDev(false)).not.toThrow();
|
|
expect(() => deepFreezeAndThrowOnMutationInDev(5)).not.toThrow();
|
|
expect(() => deepFreezeAndThrowOnMutationInDev()).not.toThrow();
|
|
});
|
|
|
|
it('should throw on mutation in dev with strict', () => {
|
|
'use strict';
|
|
__DEV__ = true;
|
|
var o = {key: 'oldValue'};
|
|
deepFreezeAndThrowOnMutationInDev(o);
|
|
expect(() => { o.key = 'newValue'; }).toThrowError(
|
|
'You attempted to set the key `key` with the value `"newValue"` ' +
|
|
'on an object that is meant to be immutable and has been frozen.'
|
|
);
|
|
expect(o.key).toBe('oldValue');
|
|
});
|
|
|
|
it('should throw on mutation in dev without strict', () => {
|
|
__DEV__ = true;
|
|
var o = {key: 'oldValue'};
|
|
deepFreezeAndThrowOnMutationInDev(o);
|
|
expect(() => { o.key = 'newValue'; }).toThrowError(
|
|
'You attempted to set the key `key` with the value `"newValue"` ' +
|
|
'on an object that is meant to be immutable and has been frozen.'
|
|
);
|
|
expect(o.key).toBe('oldValue');
|
|
});
|
|
|
|
it('should throw on nested mutation in dev with strict', () => {
|
|
'use strict';
|
|
__DEV__ = true;
|
|
var o = {key1: {key2: {key3: 'oldValue'}}};
|
|
deepFreezeAndThrowOnMutationInDev(o);
|
|
expect(() => { o.key1.key2.key3 = 'newValue'; }).toThrowError(
|
|
'You attempted to set the key `key3` with the value `"newValue"` ' +
|
|
'on an object that is meant to be immutable and has been frozen.'
|
|
);
|
|
expect(o.key1.key2.key3).toBe('oldValue');
|
|
});
|
|
|
|
it('should throw on nested mutation in dev without strict', () => {
|
|
__DEV__ = true;
|
|
var o = {key1: {key2: {key3: 'oldValue'}}};
|
|
deepFreezeAndThrowOnMutationInDev(o);
|
|
expect(() => { o.key1.key2.key3 = 'newValue'; }).toThrowError(
|
|
'You attempted to set the key `key3` with the value `"newValue"` ' +
|
|
'on an object that is meant to be immutable and has been frozen.'
|
|
);
|
|
expect(o.key1.key2.key3).toBe('oldValue');
|
|
});
|
|
|
|
it('should throw on insertion in dev with strict', () => {
|
|
'use strict';
|
|
__DEV__ = true;
|
|
var o = {oldKey: 'value'};
|
|
deepFreezeAndThrowOnMutationInDev(o);
|
|
expect(() => { o.newKey = 'value'; })
|
|
.toThrowError(
|
|
/(Cannot|Can't) add property newKey, object is not extensible/
|
|
);
|
|
expect(o.newKey).toBe(undefined);
|
|
});
|
|
|
|
it('should not throw on insertion in dev without strict', () => {
|
|
__DEV__ = true;
|
|
var o = {oldKey: 'value'};
|
|
deepFreezeAndThrowOnMutationInDev(o);
|
|
expect(() => { o.newKey = 'value'; }).not.toThrow();
|
|
expect(o.newKey).toBe(undefined);
|
|
});
|
|
|
|
it('should mutate and not throw on mutation in prod', () => {
|
|
'use strict';
|
|
__DEV__ = false;
|
|
var o = {key: 'oldValue'};
|
|
deepFreezeAndThrowOnMutationInDev(o);
|
|
expect(() => { o.key = 'newValue'; }).not.toThrow();
|
|
expect(o.key).toBe('newValue');
|
|
});
|
|
|
|
// This is a limitation of the technique unfortunately
|
|
it('should not deep freeze already frozen objects', () => {
|
|
'use strict';
|
|
__DEV__ = true;
|
|
var o = {key1: {key2: 'oldValue'}};
|
|
Object.freeze(o);
|
|
deepFreezeAndThrowOnMutationInDev(o);
|
|
expect(() => { o.key1.key2 = 'newValue'; }).not.toThrow();
|
|
expect(o.key1.key2).toBe('newValue');
|
|
});
|
|
|
|
it("shouldn't recurse infinitely", () => {
|
|
__DEV__ = true;
|
|
var o = {};
|
|
o.circular = o;
|
|
deepFreezeAndThrowOnMutationInDev(o);
|
|
});
|
|
|
|
});
|