test: custom context is available to resolvers

Author: Davide-Gheri

packages/apollo/tests/e2e/custom-context.spec.ts

@@ -0,0 +1,52 @@
+import { INestApplication } from '@nestjs/common';
+import { ExpressAdapter } from '@nestjs/platform-express';
+import { Test } from '@nestjs/testing';
+import * as request from 'supertest';
+import { CustomContextModule } from '../graphql/custom-context/custom-context.module';
+import { FastifyAdapter } from '@nestjs/platform-fastify';
+
+describe('GraphQL (custom context)', () => {
+  let app: INestApplication;
+
+  describe.each([
+    ['Express', new ExpressAdapter()],
+    ['Fastify', new FastifyAdapter()],
+  ])('Custom context with %s', (_, adapter) => {
+    beforeEach(async () => {
+      const module = await Test.createTestingModule({
+        imports: [CustomContextModule],
+      }).compile();
+
+      app = module.createNestApplication(adapter);
+      await app.init();
+
+      const instance = app.getHttpAdapter().getInstance();
+      if ('ready' in instance && typeof instance.ready === 'function') {
+        await instance.ready();
+      }
+    });
+
+    it('should return query result', () => {
+      return request(app.getHttpServer())
+        .post('/graphql')
+        .send({
+          operationName: null,
+          variables: {},
+          query: `
+          {
+            fooFromContext
+          }
+          `,
+        })
+        .expect(200, {
+          data: {
+            fooFromContext: 'bar',
+          },
+        });
+    });
+
+    afterEach(async () => {
+      await app.close();
+    });
+  });
+});

packages/apollo/tests/graphql/custom-context/custom-context.module.ts

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+import { Module } from '@nestjs/common';
+import { GraphQLModule } from '@nestjs/graphql';
+import { ApolloDriverConfig } from '../../../lib';
+import { ApolloDriver } from '../../../lib/drivers';
+import { CustomContextResolver } from './custom-context.resolver';
+
+@Module({
+  imports: [
+    GraphQLModule.forRoot<ApolloDriverConfig>({
+      driver: ApolloDriver,
+      autoSchemaFile: true,
+      context: (request) => ({
+        foo: 'bar',
+        request,
+      }),
+    }),
+  ],
+  providers: [CustomContextResolver],
+})
+export class CustomContextModule {}

packages/apollo/tests/graphql/custom-context/custom-context.resolver.ts

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+import { Resolver, Query, Context } from '@nestjs/graphql';
+
+@Resolver()
+export class CustomContextResolver {
+  @Query(() => String)
+  fooFromContext(@Context() ctx: Record<string, unknown>) {
+    return ctx.foo;
+  }
+}