fix(ivy): use devModeEqual in no change mode (#25252)

To avoid the unfamous error `Expression has changed after it was checked.`

PR Close #25252
This commit is contained in:
Victor Berchet 2018-08-01 10:57:16 -07:00 committed by Kara Erickson
parent 1fb7111da1
commit b38931b484
4 changed files with 59 additions and 21 deletions

View File

@ -2739,7 +2739,7 @@ export function bindingUpdated(value: any): boolean {
if (bindingIndex >= viewData.length) {
viewData[viewData[BINDING_INDEX]++] = value;
} else if (isDifferent(viewData[bindingIndex], value)) {
} else if (isDifferent(viewData[bindingIndex], value, checkNoChangesMode)) {
throwErrorIfNoChangesMode(creationMode, checkNoChangesMode, viewData[bindingIndex], value);
viewData[viewData[BINDING_INDEX]++] = value;
} else {

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@ -5,15 +5,20 @@
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {devModeEqual} from '../change_detection/change_detection';
import {assertLessThan} from './assert';
import {LElementNode} from './interfaces/node';
import {HEADER_OFFSET, LViewData} from './interfaces/view';
/**
* Must use this method for CD (instead of === ) since NaN !== NaN
* Returns wether the values are different from a change detection stand point.
*
* Constraints are relaxed in checkNoChanges mode. See `devModeEqual` for details.
*/
export function isDifferent(a: any, b: any): boolean {
export function isDifferent(a: any, b: any, checkNoChangesMode: boolean): boolean {
if (ngDevMode && checkNoChangesMode) {
return !devModeEqual(a, b);
}
// NaN is the only value that is not equal to itself so the first
// test checks if both a and b are not NaN
return !(a !== a && b !== b) && a !== b;

View File

@ -9,7 +9,7 @@
"name": "BLOOM_MASK"
},
{
"name": "CIRCULAR$1"
"name": "CIRCULAR$2"
},
{
"name": "CLEANUP"

View File

@ -12,27 +12,60 @@ describe('util', () => {
describe('isDifferent', () => {
describe('checkNoChangeMode = false', () => {
it('should mark non-equal arguments as different', () => {
expect(isDifferent({}, {})).toBeTruthy();
expect(isDifferent('foo', 'bar')).toBeTruthy();
expect(isDifferent(0, 1)).toBeTruthy();
expect(isDifferent({}, {}, false)).toBeTruthy();
expect(isDifferent('foo', 'bar', false)).toBeTruthy();
expect(isDifferent(0, 1, false)).toBeTruthy();
});
it('should not mark equal arguments as different', () => {
const obj = {};
expect(isDifferent(obj, obj)).toBeFalsy();
expect(isDifferent('foo', 'foo')).toBeFalsy();
expect(isDifferent(1, 1)).toBeFalsy();
expect(isDifferent(obj, obj, false)).toBeFalsy();
expect(isDifferent('foo', 'foo', false)).toBeFalsy();
expect(isDifferent(1, 1, false)).toBeFalsy();
});
it('should not mark NaN as different', () => { expect(isDifferent(NaN, NaN)).toBeFalsy(); });
it('should not mark NaN as different',
() => { expect(isDifferent(NaN, NaN, false)).toBeFalsy(); });
it('should mark NaN with other values as different', () => {
expect(isDifferent(NaN, 'foo')).toBeTruthy();
expect(isDifferent(5, NaN)).toBeTruthy();
expect(isDifferent(NaN, 'foo', false)).toBeTruthy();
expect(isDifferent(5, NaN, false)).toBeTruthy();
});
});
describe('checkNoChangeMode = true', () => {
// Assert relaxed constraint in checkNoChangeMode
it('should not mark non-equal arrays, object and function as different', () => {
expect(isDifferent([], [], true)).toBeFalsy();
expect(isDifferent(() => 0, () => 0, true)).toBeFalsy();
expect(isDifferent({}, {}, true)).toBeFalsy();
});
it('should mark non-equal arguments as different', () => {
expect(isDifferent('foo', 'bar', true)).toBeTruthy();
expect(isDifferent(0, 1, true)).toBeTruthy();
});
it('should not mark equal arguments as different', () => {
const obj = {};
expect(isDifferent(obj, obj, false)).toBeFalsy();
expect(isDifferent('foo', 'foo', false)).toBeFalsy();
expect(isDifferent(1, 1, false)).toBeFalsy();
});
it('should not mark NaN as different',
() => { expect(isDifferent(NaN, NaN, false)).toBeFalsy(); });
it('should mark NaN with other values as different', () => {
expect(isDifferent(NaN, 'foo', false)).toBeTruthy();
expect(isDifferent(5, NaN, false)).toBeTruthy();
});
});
});
describe('flatten', () => {
it('should flatten an empty array', () => { expect(flatten([])).toEqual([]); });