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fix(ivy): Prevent errors when querying DebugElement roots that were outside angular context (#34687) 

DebugElement.query also matches elements that may have been created
outside of Angular (ex: with `document.appendChild`). If those matched
DebugElements are in turn used to query for more elements, an error
occurs because the first step in queryAll is to load the LContext.

PR Close #34687
This commit is contained in:
Andrew Scott 2020-01-08 16:39:32 -08:00 committed by atscott
parent 58f10026c4
commit 7d401853b5
2 changed files with 58 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
packages/core/src/debug/debug_node.ts
View File

@ -470,10 +470,16 @@ function _queryAllR3(
function _queryAllR3(
parentElement: DebugElement, predicate: Predicate<DebugElement>| Predicate<DebugNode>,
matches: DebugElement[] | DebugNode[], elementsOnly: boolean) {
const context = loadLContext(parentElement.nativeNode) !;
const parentTNode = context.lView[TVIEW].data[context.nodeIndex] as TNode;
_queryNodeChildrenR3(
parentTNode, context.lView, predicate, matches, elementsOnly, parentElement.nativeNode);
const context = loadLContext(parentElement.nativeNode, false);
if (context !== null) {
const parentTNode = context.lView[TVIEW].data[context.nodeIndex] as TNode;
_queryNodeChildrenR3(
parentTNode, context.lView, predicate, matches, elementsOnly, parentElement.nativeNode);
} else {
// If the context is null, then `parentElement` was either created with Renderer2 or native DOM
// APIs.
_queryNativeNodeDescendants(parentElement.nativeNode, predicate, matches, elementsOnly);
}
}
/**

74
packages/core/test/debug/debug_node_spec.ts
View File

@ -577,38 +577,51 @@ class TestCmptWithPropInterpolation {
expect(fixture.debugElement.query(By.css('.myclass'))).toBeTruthy();
});
it('DebugElement.query should work with dynamically created descendant elements', () => {
@Directive({
selector: '[dir]',
})
class MyDir {
@Input('dir') dir: number|undefined;
describe('DebugElement.query with dynamically created descendant elements', () => {
let fixture: ComponentFixture<{}>;
beforeEach(() => {
constructor(renderer: Renderer2, element: ElementRef) {
const outerDiv = renderer.createElement('div');
const innerDiv = renderer.createElement('div');
const div = renderer.createElement('div');
@Directive({
selector: '[dir]',
})
class MyDir {
@Input('dir') dir: number|undefined;
div.classList.add('myclass');
constructor(renderer: Renderer2, element: ElementRef) {
const outerDiv = renderer.createElement('div');
const innerDiv = renderer.createElement('div');
innerDiv.classList.add('inner');
const div = renderer.createElement('div');
renderer.appendChild(innerDiv, div);
renderer.appendChild(outerDiv, innerDiv);
renderer.appendChild(element.nativeElement, outerDiv);
div.classList.add('myclass');
renderer.appendChild(innerDiv, div);
renderer.appendChild(outerDiv, innerDiv);
renderer.appendChild(element.nativeElement, outerDiv);
}
}
}
@Component({
selector: 'app-test',
template: '<div dir></div>',
})
class MyComponent {
}
@Component({
selector: 'app-test',
template: '<div dir></div>',
})
class MyComponent {
}
TestBed.configureTestingModule({declarations: [MyComponent, MyDir]});
const fixture = TestBed.createComponent(MyComponent);
fixture.detectChanges();
TestBed.configureTestingModule({declarations: [MyComponent, MyDir]});
fixture = TestBed.createComponent(MyComponent);
fixture.detectChanges();
expect(fixture.debugElement.query(By.css('.myclass'))).toBeTruthy();
});
it('should find the dynamic elements from fixture root',
() => { expect(fixture.debugElement.query(By.css('.myclass'))).toBeTruthy(); });
it('can use a dynamic element as root for another query', () => {
const inner = fixture.debugElement.query(By.css('.inner'));
expect(inner).toBeTruthy();
expect(inner.query(By.css('.myclass'))).toBeTruthy();
});
});
describe('DebugElement.query doesn\'t fail on elements outside Angular context', () => {
@ -617,7 +630,9 @@ class TestCmptWithPropInterpolation {
constructor(private elementRef: ElementRef) {}
ngAfterViewInit() {
this.elementRef.nativeElement.children[0].appendChild(document.createElement('p'));
const ul = document.createElement('ul');
ul.appendChild(document.createElement('li'));
this.elementRef.nativeElement.children[0].appendChild(ul);
}
}
@ -664,6 +679,13 @@ class TestCmptWithPropInterpolation {
it('when searching by injector',
() => { expect(() => el.query(e => e.injector === null)).not.toThrow(); });
onlyInIvy('VE does not match elements created outside Angular context')
.it('when using the out-of-context element as the DebugElement query root', () => {
const debugElOutsideAngularContext = el.query(By.css('ul'));
expect(debugElOutsideAngularContext.queryAll(By.css('li')).length).toBe(1);
expect(debugElOutsideAngularContext.query(By.css('li'))).toBeDefined();
});
});
it('DebugElement.queryAll should pick up both elements inserted via the view and through Renderer2',