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fix(ivy): support injection flags for provider deps without new (#30216)

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Previously, we were supporting injection flags for provider deps, but only
if they fit the format `new Optional()`. This commit fixes resolution of
provider deps to also support `Optional` (without the new). This keeps us
backwards compatible with what View Engine supported.

PR Close #30216
This commit is contained in:
Kara Erickson 2019-04-30 16:41:18 -07:00
parent b15a403c71
commit b1506a3271
2 changed files with 27 additions and 5 deletions
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9
packages/core/src/di/injector_compatibility.ts
View File

@ -145,13 +145,14 @@ export function injectArgs(types: (Type<any>| InjectionToken<any>| any[])[]): an
for (let j = 0; j < arg.length; j++) {
const meta = arg[j];
if (meta instanceof Optional || meta.ngMetadataName === 'Optional') {
if (meta instanceof Optional || meta.ngMetadataName === 'Optional' || meta === Optional) {
flags |= InjectFlags.Optional;
} else if (meta instanceof SkipSelf || meta.ngMetadataName === 'SkipSelf') {
} else if (
meta instanceof SkipSelf || meta.ngMetadataName === 'SkipSelf' || meta === SkipSelf) {
flags |= InjectFlags.SkipSelf;
} else if (meta instanceof Self || meta.ngMetadataName === 'Self') {
} else if (meta instanceof Self || meta.ngMetadataName === 'Self' || meta === Self) {
flags |= InjectFlags.Self;
} else if (meta instanceof Inject) {
} else if (meta instanceof Inject || meta === Inject) {
type = meta.token;
} else {
type = meta;

23
packages/core/test/acceptance/providers_spec.ts
View File

@ -6,7 +6,7 @@
* found in the LICENSE file at https://angular.io/license
*/
import {Component, Directive, Inject, Injectable, InjectionToken, NgModule, forwardRef} from '@angular/core';
import {Component, Directive, Inject, Injectable, InjectionToken, Injector, NgModule, Optional, forwardRef} from '@angular/core';
import {TestBed, async, inject} from '@angular/core/testing';
import {By} from '@angular/platform-browser';
import {onlyInIvy} from '@angular/private/testing';
@ -321,4 +321,25 @@ describe('providers', () => {
});
describe('flags', () => {
class MyService {
constructor(public value: OtherService|null) {}
}
class OtherService {}
it('should support Optional flag in deps', () => {
const injector =
Injector.create([{provide: MyService, deps: [[new Optional(), OtherService]]}]);
expect(injector.get(MyService).value).toBe(null);
});
it('should support Optional flag in deps without instantiating it', () => {
const injector = Injector.create([{provide: MyService, deps: [[Optional, OtherService]]}]);
expect(injector.get(MyService).value).toBe(null);
});
});
});