graphql setup

src/thing/thing.model.ts

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+import { Field, Int, ObjectType } from '@nestjs/graphql';
+
+@ObjectType()
+export class Thing {
+  @Field(type => Int)
+  id: number;
+}

src/thing/thing.resolver.spec.ts

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+import { Test, TestingModule } from '@nestjs/testing';
+import { ThingResolver } from './thing.resolver';
+
+describe('ThingResolver', () => {
+  let resolver: ThingResolver;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [ThingResolver],
+    }).compile();
+
+    resolver = module.get<ThingResolver>(ThingResolver);
+  });
+
+  it('should be defined', () => {
+    expect(resolver).toBeDefined();
+  });
+});

src/thing/thing.resolver.ts

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+import { Query, Resolver } from '@nestjs/graphql';
+import { Thing } from './thing.model';
+
+@Resolver(() => Thing)
+export class ThingResolver {
+  constructor() {}
+
+  @Query(() => [Thing])
+  async things(): Promise<Thing[]> {
+    return [
+      {
+        id: 1,
+      },
+      {
+        id: 2,
+      },
+    ];
+  }
+}