Merge pull request #10228 from nathanArseneau/test/sample-02-gateways

test(sample-02): added unit tests

Author: kamilmysliwiec

sample/02-gateways/e2e/events-gateway/gateway.e2e-spec.ts

@@ -0,0 +1,53 @@
+import { INestApplication } from '@nestjs/common';
+import { Test } from '@nestjs/testing';
+import { AppModule } from '../../src/app.module';
+import { io, Socket } from 'socket.io-client';
+
+describe('EventsGateway', () => {
+  let app: INestApplication;
+  let socket: Socket;
+
+  beforeAll(async () => {
+    const moduleRef = await Test.createTestingModule({
+      imports: [AppModule],
+    }).compile();
+
+    app = moduleRef.createNestApplication();
+    await app.listen(3000);
+  });
+
+  beforeEach(() => {
+    socket = io('http://localhost:3000');
+    socket.connect();
+  });
+
+  describe('findAll', () => {
+    it('should receive 3 numbers', done => {
+      let eventCount = 1;
+      socket.emit('events', { test: 'test' });
+      socket.on('events', data => {
+        expect(data).toBe(eventCount);
+        if (++eventCount > 3) {
+          done();
+        }
+      });
+    });
+  });
+
+  describe('identity', () => {
+    it('should return the same number has what was sent', done => {
+      socket.emit('identity', 0, response => {
+        expect(response).toBe(0);
+        done();
+      });
+    });
+  });
+
+  afterEach(() => {
+    socket.disconnect();
+  });
+
+  afterAll(async () => {
+    await app.close();
+  });
+});

sample/02-gateways/e2e/jest-e2e.json

@@ -0,0 +1,14 @@
+{
+    "moduleFileExtensions": [
+        "ts",
+        "tsx",
+        "js",
+        "json"
+    ],
+    "transform": {
+        "^.+\\.tsx?$": "ts-jest"
+    },
+    "testRegex": "/e2e/.*\\.(e2e-test|e2e-spec).(ts|tsx|js)$",
+    "collectCoverageFrom" : ["src/**/*.{js,jsx,tsx,ts}", "!**/node_modules/**", "!**/vendor/**"],
+    "coverageReporters": ["json", "lcov"]
+}

sample/02-gateways/jest.json

@@ -0,0 +1,14 @@
+{
+  "moduleFileExtensions": [
+        "ts",
+        "tsx",
+        "js",
+        "json"
+    ],
+    "transform": {
+        "^.+\\.tsx?$": "ts-jest"
+    },
+    "testRegex": "/src/.*\\.(test|spec).(ts|tsx|js)$",
+    "collectCoverageFrom" : ["src/**/*.{js,jsx,tsx,ts}", "!**/node_modules/**", "!**/vendor/**"],
+    "coverageReporters": ["json", "lcov"]
+}

sample/02-gateways/package-lock.json

@@ -16,7 +16,7 @@
     "test:watch": "jest --watch",
     "test:cov": "jest --coverage",
     "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
-    "test:e2e": "echo 'No e2e tests implemented yet.'"
+    "test:e2e": "jest --config ./e2e/jest-e2e.json"
   },
   "dependencies": {
     "@nestjs/common": "9.3.12",
@@ -37,6 +37,7 @@
     "@nestjs/schematics": "9.0.4",
     "@nestjs/testing": "9.3.12",
     "@types/express": "4.17.13",
+    "@types/jest": "28.1.4",
     "@types/node": "18.0.3",
     "@types/supertest": "2.0.12",
     "@types/ws": "8.5.3",
@@ -54,5 +55,22 @@
     "ts-node": "10.8.2",
     "tsconfig-paths": "4.0.0",
     "typescript": "4.9.5"
+  },
+  "jest": {
+    "moduleFileExtensions": [
+      "js",
+      "json",
+      "ts"
+    ],
+    "rootDir": "src",
+    "testRegex": ".*\\.spec\\.ts$",
+    "transform": {
+      "^.+\\.(t|j)s$": "ts-jest"
+    },
+    "collectCoverageFrom": [
+      "**/*.(t|j)s"
+    ],
+    "coverageDirectory": "../coverage",
+    "testEnvironment": "node"
   }
 }

sample/02-gateways/package.json

@@ -0,0 +1,40 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { reduce } from 'rxjs/operators';
+import { EventsGateway } from './events.gateway';
+
+describe('EventsGateway', () => {
+  let gateway: EventsGateway;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [EventsGateway],
+    }).compile();
+
+    gateway = module.get<EventsGateway>(EventsGateway);
+  });
+
+  it('should be defined', () => {
+    expect(gateway).toBeDefined();
+  });
+
+  describe('findAll', () => {
+    it('should return 3 numbers', done => {
+      gateway
+        .findAll({})
+        .pipe(reduce((acc, item) => [...acc, item], []))
+        .subscribe(results => {
+          expect(results.length).toBe(3);
+          results.forEach((result, index) =>
+            expect(result.data).toBe(index + 1),
+          );
+          done();
+        });
+    });
+  });
+
+  describe('identity', () => {
+    it('should return the same number has what was sent', async () => {
+      await expect(gateway.identity(1)).resolves.toBe(1);
+    });
+  });
+});