test(integration): add test for unknown dependency exception

Author: j3bb9z

integration/injector/e2e/property-injection.spec.ts

@@ -3,6 +3,7 @@ import { expect } from 'chai';
 import { DependencyService } from '../src/properties/dependency.service';
 import { PropertiesModule } from '../src/properties/properties.module';
 import { PropertiesService } from '../src/properties/properties.service';
+import { UnknownDependenciesException } from '@nestjs/core/errors/exceptions/unknown-dependencies.exception';
 
 describe('Injector', () => {
   it('should resolve property-based dependencies', async () => {
@@ -14,5 +15,30 @@ describe('Injector', () => {
 
     expect(app.get(PropertiesService).service).to.be.eql(dependency);
     expect(app.get(PropertiesService).token).to.be.true;
+    expect(app.get(PropertiesService).symbolToken).to.be.true;
+  });
+
+  it('should throw UnknownDependenciesException when dependency is not met', async () => {
+    let exception;
+
+    try {
+      const builder = Test.createTestingModule({
+        providers: [
+          DependencyService,
+          PropertiesService,
+          {
+            provide: 'token',
+            useValue: true,
+          },
+          // symbol token is missing here
+        ],
+      });
+      const app = await builder.compile();
+      app.get(DependencyService);
+    } catch (e) {
+      exception = e;
+    }
+
+    expect(exception).to.be.instanceOf(UnknownDependenciesException);
   });
 });

integration/injector/src/properties/properties.module.ts

@@ -1,6 +1,6 @@
 import { Module } from '@nestjs/common';
 import { DependencyService } from './dependency.service';
-import { PropertiesService } from './properties.service';
+import { PropertiesService, SYMBOL_TOKEN } from './properties.service';
 
 @Module({
   providers: [
@@ -10,6 +10,10 @@ import { PropertiesService } from './properties.service';
       provide: 'token',
       useValue: true,
     },
+    {
+      provide: SYMBOL_TOKEN,
+      useValue: true,
+    },
   ],
 })
 export class PropertiesModule {}

integration/injector/src/properties/properties.service.ts

@@ -1,8 +1,11 @@
 import { Inject, Injectable } from '@nestjs/common';
 import { DependencyService } from './dependency.service';
 
+export const SYMBOL_TOKEN = Symbol('token');
+
 @Injectable()
 export class PropertiesService {
   @Inject() service: DependencyService;
   @Inject('token') token: boolean;
+  @Inject(SYMBOL_TOKEN) symbolToken: boolean;
 }