feat(service-worker): expose SwRegistrationOptions token to allow runtime config (#21842)

Previously, the ServiceWorker registration options should be defined as
an object literal (in order for them to be compatible with Ahead-of-Time
compilation), thus making it impossible to base the ServiceWorker
behavior on runtime conditions.
This commit allows specifying the registration options using a regular
provider, which means that it can take advantage of the `useFactory`
option to determine the config at runtime, while still remaining
compatible with AoT compilation.

PR Close #21842

packages/service-worker/test/comm_spec.ts

@@ -9,7 +9,7 @@
 import {PLATFORM_ID} from '@angular/core';
 import {TestBed} from '@angular/core/testing';
 import {NgswCommChannel} from '@angular/service-worker/src/low_level';
-import {SwRegistrationOptions, ngswCommChannelFactory} from '@angular/service-worker/src/module';
+import {ServiceWorkerModule, SwRegistrationOptions, ngswCommChannelFactory} from '@angular/service-worker/src/module';
 import {SwPush} from '@angular/service-worker/src/push';
 import {SwUpdate} from '@angular/service-worker/src/update';
 import {MockPushManager, MockPushSubscription, MockServiceWorkerContainer, MockServiceWorkerRegistration, patchDecodeBase64} from '@angular/service-worker/testing/mock';
@@ -47,6 +47,45 @@ import {async_fit, async_it} from './async';
       });
     });
 
+    describe('ServiceWorkerModule config', () => {
+      it('SwUpdate isEnabled is false when configuring via static method', () => {
+        TestBed.configureTestingModule(
+            {imports: [ServiceWorkerModule.register('', {enabled: false})]});
+
+        expect(TestBed.get(SwUpdate).isEnabled).toEqual(false);
+      });
+
+      it('SwUpdate isEnabled is true when configuring via static method', () => {
+        TestBed.configureTestingModule({
+          imports: [ServiceWorkerModule.register('', {enabled: true})],
+          providers: [{provide: NgswCommChannel, useValue: comm}]
+        });
+
+        expect(TestBed.get(SwUpdate).isEnabled).toEqual(true);
+      });
+
+      it('SwUpdate isEnabled is false when configuring directly via token', () => {
+        TestBed.configureTestingModule({
+          imports: [ServiceWorkerModule.register('')],
+          providers: [{provide: SwRegistrationOptions, useFactory: () => ({enabled: false})}]
+        });
+
+        expect(TestBed.get(SwUpdate).isEnabled).toEqual(false);
+      });
+
+      it('SwUpdate isEnabled is true when configuring directly via token', () => {
+        TestBed.configureTestingModule({
+          imports: [ServiceWorkerModule.register('')],
+          providers: [
+            {provide: NgswCommChannel, useValue: comm},
+            {provide: SwRegistrationOptions, useFactory: () => ({enabled: true})}
+          ]
+        });
+
+        expect(TestBed.get(SwUpdate).isEnabled).toEqual(true);
+      });
+    });
+
     describe('ngswCommChannelFactory', () => {
       it('gives disabled NgswCommChannel for platform-server', () => {
         TestBed.configureTestingModule({