fix(MockInstance): multi-token and multi-service help-me-mom#5585

docs/articles/api/MockInstance.md

@@ -97,6 +97,12 @@ MockInstance(TOKEN, (instance, injector) => {
 MockInstance(TOKEN, () => true);
 ```
 
+If you need to mock a multi-value token, simply return an array:
+
+```ts
+MockInstance(TOKEN, () => [multiValue1, multiValue2, multiValue3]);
+```
+
 ## Customization scopes
 
 Time to time, we need to apply a set of customizations for a suite or a test.

libs/ng-mocks/src/lib/mock-instance/mock-instance.ts

@@ -148,7 +148,7 @@ export function MockInstance<T extends object, K extends keyof T, S extends T[K]
  */
 export function MockInstance<T>(
   declaration: InjectionToken<T>,
-  init?: (instance: T | undefined, injector: Injector | undefined) => Partial<T>,
+  init?: (instance: T | undefined, injector: Injector | undefined) => Partial<T> | Array<Partial<T>>,
 ): void;
 
 /**
@@ -166,7 +166,7 @@ export function MockInstance<T>(
 export function MockInstance<T>(
   declaration: InjectionToken<T>,
   config?: {
-    init?: (instance: T | undefined, injector: Injector | undefined) => Partial<T>;
+    init?: (instance: T | undefined, injector: Injector | undefined) => Partial<T> | Array<Partial<T>>;
   },
 ): void;
 
@@ -190,7 +190,7 @@ export function MockInstance<T>(
  */
 export function MockInstance<T>(
   declaration: AnyType<T>,
-  init?: (instance: T, injector: Injector | undefined) => void | Partial<T>,
+  init?: (instance: T, injector: Injector | undefined) => void | Partial<T> | Array<Partial<T>>,
 ): void;
 
 /**
@@ -219,7 +219,7 @@ export function MockInstance<T>(
 export function MockInstance<T>(
   declaration: AnyType<T>,
   config?: {
-    init?: (instance: T, injector: Injector | undefined) => void | Partial<T>;
+    init?: (instance: T, injector: Injector | undefined) => void | Partial<T> | Array<Partial<T>>;
   },
 ): void;
 

tests/issue-5537/test.spec.ts

@@ -0,0 +1,68 @@
+import {
+  Inject,
+  Injectable,
+  InjectionToken,
+  NgModule,
+} from '@angular/core';
+import { TestBed } from '@angular/core/testing';
+
+import {
+  MockBuilder,
+  MockInstance,
+  MockRender,
+  ngMocks,
+} from 'ng-mocks';
+
+const TOKEN = new InjectionToken<string>('TOKEN');
+
+@Injectable()
+class TargetService {
+  constructor(@Inject(TOKEN) public tokens: Array<string>) {}
+}
+
+@NgModule({
+  providers: [
+    TargetService,
+    {
+      provide: TOKEN,
+      multi: true,
+      useValue: '1',
+    },
+    {
+      provide: TOKEN,
+      multi: true,
+      useValue: '2',
+    },
+  ],
+})
+class TargetModule {}
+
+// @see https://github.com/help-me-mom/ng-mocks/discussions/5537
+describe('issue-5537', () => {
+  describe('real', () => {
+    beforeEach(() =>
+      TestBed.configureTestingModule({
+        imports: [TargetModule],
+      }).compileComponents(),
+    );
+
+    it('creates multi token', () => {
+      const service = ngMocks.get(TargetService);
+      expect(service.tokens).toEqual(['1', '2']);
+    });
+  });
+
+  describe('mock', () => {
+    MockInstance.scope();
+
+    beforeEach(() => MockBuilder(TargetService, TargetModule));
+
+    it('creates multi token', () => {
+      MockInstance(TOKEN, () => ['3', '4']);
+
+      const service =
+        MockRender(TargetService).point.componentInstance;
+      expect(service.tokens).toEqual(['3', '4']);
+    });
+  });
+});