fix(ivy): use devModeEqual in no change mode (#25252)
To avoid the unfamous error `Expression has changed after it was checked.` PR Close #25252
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@ -2739,7 +2739,7 @@ export function bindingUpdated(value: any): boolean {
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if (bindingIndex >= viewData.length) {
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viewData[viewData[BINDING_INDEX]++] = value;
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} else if (isDifferent(viewData[bindingIndex], value)) {
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} else if (isDifferent(viewData[bindingIndex], value, checkNoChangesMode)) {
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throwErrorIfNoChangesMode(creationMode, checkNoChangesMode, viewData[bindingIndex], value);
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viewData[viewData[BINDING_INDEX]++] = value;
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} else {
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@ -5,15 +5,20 @@
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {devModeEqual} from '../change_detection/change_detection';
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import {assertLessThan} from './assert';
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import {LElementNode} from './interfaces/node';
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import {HEADER_OFFSET, LViewData} from './interfaces/view';
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/**
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* Must use this method for CD (instead of === ) since NaN !== NaN
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* Returns wether the values are different from a change detection stand point.
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*
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* Constraints are relaxed in checkNoChanges mode. See `devModeEqual` for details.
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*/
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export function isDifferent(a: any, b: any): boolean {
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export function isDifferent(a: any, b: any, checkNoChangesMode: boolean): boolean {
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if (ngDevMode && checkNoChangesMode) {
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return !devModeEqual(a, b);
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}
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// NaN is the only value that is not equal to itself so the first
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// test checks if both a and b are not NaN
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return !(a !== a && b !== b) && a !== b;
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@ -9,7 +9,7 @@
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"name": "BLOOM_MASK"
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},
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{
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"name": "CIRCULAR$1"
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"name": "CIRCULAR$2"
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},
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{
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"name": "CLEANUP"
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@ -12,27 +12,60 @@ describe('util', () => {
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describe('isDifferent', () => {
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describe('checkNoChangeMode = false', () => {
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it('should mark non-equal arguments as different', () => {
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expect(isDifferent({}, {})).toBeTruthy();
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expect(isDifferent('foo', 'bar')).toBeTruthy();
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expect(isDifferent(0, 1)).toBeTruthy();
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expect(isDifferent({}, {}, false)).toBeTruthy();
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expect(isDifferent('foo', 'bar', false)).toBeTruthy();
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expect(isDifferent(0, 1, false)).toBeTruthy();
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});
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it('should not mark equal arguments as different', () => {
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const obj = {};
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expect(isDifferent(obj, obj)).toBeFalsy();
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expect(isDifferent('foo', 'foo')).toBeFalsy();
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expect(isDifferent(1, 1)).toBeFalsy();
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expect(isDifferent(obj, obj, false)).toBeFalsy();
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expect(isDifferent('foo', 'foo', false)).toBeFalsy();
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expect(isDifferent(1, 1, false)).toBeFalsy();
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});
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it('should not mark NaN as different', () => { expect(isDifferent(NaN, NaN)).toBeFalsy(); });
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it('should not mark NaN as different',
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() => { expect(isDifferent(NaN, NaN, false)).toBeFalsy(); });
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it('should mark NaN with other values as different', () => {
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expect(isDifferent(NaN, 'foo')).toBeTruthy();
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expect(isDifferent(5, NaN)).toBeTruthy();
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expect(isDifferent(NaN, 'foo', false)).toBeTruthy();
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expect(isDifferent(5, NaN, false)).toBeTruthy();
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});
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});
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describe('checkNoChangeMode = true', () => {
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// Assert relaxed constraint in checkNoChangeMode
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it('should not mark non-equal arrays, object and function as different', () => {
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expect(isDifferent([], [], true)).toBeFalsy();
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expect(isDifferent(() => 0, () => 0, true)).toBeFalsy();
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expect(isDifferent({}, {}, true)).toBeFalsy();
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});
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it('should mark non-equal arguments as different', () => {
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expect(isDifferent('foo', 'bar', true)).toBeTruthy();
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expect(isDifferent(0, 1, true)).toBeTruthy();
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});
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it('should not mark equal arguments as different', () => {
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const obj = {};
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expect(isDifferent(obj, obj, false)).toBeFalsy();
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expect(isDifferent('foo', 'foo', false)).toBeFalsy();
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expect(isDifferent(1, 1, false)).toBeFalsy();
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});
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it('should not mark NaN as different',
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() => { expect(isDifferent(NaN, NaN, false)).toBeFalsy(); });
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it('should mark NaN with other values as different', () => {
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expect(isDifferent(NaN, 'foo', false)).toBeTruthy();
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expect(isDifferent(5, NaN, false)).toBeTruthy();
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});
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});
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});
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describe('flatten', () => {
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it('should flatten an empty array', () => { expect(flatten([])).toEqual([]); });
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