test: add integration test for missing-injectable migration (#32349)

Adds a new test to the `ng_update_migrations` that ensures
that the `missing-injectable` migration works properly in a
real CLI project. Additionally this ensures that the
`missing-injectable` and `undecorated-classes-with-di` migrations
play nicely together.

PR Close #32349

integration/ng_update_migrations/src/app/migration-tests/providers-test-module.ts

@@ -0,0 +1,31 @@
+import {Directive, NgModule, NgZone} from '@angular/core';
+
+export class TypeCase {}
+
+// undecorated-classes-with-di migration will add "@Injectable" here
+// because the constructor is inherited in "ProvideCase".
+class BaseProviderCase {
+  constructor(zone: NgZone) {}
+}
+
+export class ProvideCase extends BaseProviderCase {}
+
+export class ProviderClass {}
+
+export class DontNeedCase {}
+
+@Directive()
+export class DirectiveCase {}
+
+@NgModule({
+  providers: [
+    TypeCase,
+    {provide: ProvideCase},
+    {provide: DontNeedCase, useValue: 0},
+    {provide: DontNeedCase, useFactory: () => null},
+    {provide: DontNeedCase, useExisting: TypeCase},
+    {provide: DontNeedCase, useClass: ProviderClass},
+    DirectiveCase,
+  ]
+})
+export class ProvidersTestModule {}

integration/ng_update_migrations/src/app/migration-tests/providers-test-module_expected.ts

@@ -0,0 +1,35 @@
+import { Directive, NgModule, NgZone, Injectable } from '@angular/core';
+
+@Injectable()
+export class TypeCase {}
+
+// undecorated-classes-with-di migration will add "@Injectable" here
+// because the constructor is inherited in "ProvideCase".
+@Injectable()
+class BaseProviderCase {
+  constructor(zone: NgZone) {}
+}
+
+@Injectable()
+export class ProvideCase extends BaseProviderCase {}
+
+@Injectable()
+export class ProviderClass {}
+
+export class DontNeedCase {}
+
+@Directive()
+export class DirectiveCase {}
+
+@NgModule({
+  providers: [
+    TypeCase,
+    {provide: ProvideCase},
+    {provide: DontNeedCase, useValue: 0},
+    {provide: DontNeedCase, useFactory: () => null},
+    {provide: DontNeedCase, useExisting: TypeCase},
+    {provide: DontNeedCase, useClass: ProviderClass},
+    DirectiveCase,
+  ]
+})
+export class ProvidersTestModule {}