test(core): Add tests for lifecycle hooks

integration/hooks/.gitignore

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+# dependencies
+/node_modules
+
+# IDE
+/.idea
+/.awcache
+/.vscode
+
+# misc
+npm-debug.log
+
+# example
+/quick-start
+
+# tests
+/test
+/coverage
+/.nyc_output
+
+# dist
+/dist

integration/hooks/e2e/on-app-boostrap.spec.ts

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+import { Test } from '@nestjs/testing';
+import { expect } from 'chai';
+import * as Sinon from 'sinon';
+import { Injectable, OnApplicationBootstrap } from '@nestjs/common';
+
+@Injectable()
+class TestInjectable implements OnApplicationBootstrap {
+  onApplicationBootstrap = Sinon.spy();
+}
+
+describe('OnApplicationBootstrap', () => {
+  it('should call onApplicationBootstrap when application starts', async () => {
+    const module = await Test.createTestingModule({
+      providers: [TestInjectable],
+    }).compile();
+
+    const app = module.createNestApplication();
+    await app.init();
+    const instance = module.get(TestInjectable);
+    expect(instance.onApplicationBootstrap.called).to.be.true;
+  });
+});

integration/hooks/e2e/on-app-shutdown.spec.ts

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+import { Test } from '@nestjs/testing';
+import { expect } from 'chai';
+import * as Sinon from 'sinon';
+import { Injectable, OnApplicationShutdown } from '@nestjs/common';
+import { spawn } from 'child_process';
+
+@Injectable()
+class TestInjectable implements OnApplicationShutdown {
+  onApplicationShutdown = Sinon.spy();
+}
+
+describe('OnApplicationShutdown', () => {
+  it('should call onApplicationShutdown when application closes', async () => {
+    const module = await Test.createTestingModule({
+      providers: [TestInjectable],
+    }).compile();
+
+    const app = module.createNestApplication();
+    await app.close();
+    const instance = module.get(TestInjectable);
+    expect(instance.onApplicationShutdown.called).to.be.true;
+  });
+});

integration/hooks/e2e/on-module-destroy.spec.ts

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+import { Test } from '@nestjs/testing';
+import { expect } from 'chai';
+import * as Sinon from 'sinon';
+import { Injectable, OnModuleDestroy } from '@nestjs/common';
+
+@Injectable()
+class TestInjectable implements OnModuleDestroy {
+  onModuleDestroy = Sinon.spy();
+}
+
+describe('OnModuleDestroy', () => {
+  it('should call onModuleDestroy when application closes', async () => {
+    const module = await Test.createTestingModule({
+      providers: [TestInjectable],
+    }).compile();
+
+    const app = module.createNestApplication();
+    await app.close();
+    const instance = module.get(TestInjectable);
+    expect(instance.onModuleDestroy.called).to.be.true;
+  });
+});

integration/hooks/e2e/on-module-init.spec.ts

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+import { Test } from '@nestjs/testing';
+import { expect } from 'chai';
+import * as Sinon from 'sinon';
+import { Injectable, OnModuleInit } from '@nestjs/common';
+
+@Injectable()
+class TestInjectable implements OnModuleInit {
+  onModuleInit = Sinon.spy();
+}
+
+describe('OnModuleInit', () => {
+  it('should call onModuleInit when application starts', async () => {
+    const module = await Test.createTestingModule({
+      providers: [TestInjectable],
+    }).compile();
+
+    const app = module.createNestApplication();
+    await app.init();
+    const instance = module.get(TestInjectable);
+    expect(instance.onModuleInit.called).to.be.true;
+  });
+});

integration/hooks/package.json

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+{
+  "name": "nest-typescript-starter",
+  "version": "1.0.0",
+  "description": "Nest TypeScript starter repository",
+  "license": "MIT",
+  "scripts": {
+    "start": "ts-node src/main"
+  },
+  "dependencies": {
+    "@nestjs/common": "^5.0.0",
+    "@nestjs/core": "^5.0.0",
+    "class-transformer": "^0.1.7",
+    "class-validator": "^0.7.2",
+    "reflect-metadata": "^0.1.12",
+    "rxjs": "^6.0.0",
+    "typescript": "^3.1.0"
+  },
+  "devDependencies": {
+    "@types/node": "^7.0.41",
+    "supertest": "^3.0.0",
+    "ts-node": "^6.0.0"
+  }
+}

integration/hooks/tsconfig.json

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+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "declaration": false,
+    "noImplicitAny": false,
+    "removeComments": true,
+    "noLib": false,
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "target": "es6",
+    "sourceMap": true,
+    "allowJs": true,
+    "outDir": "./dist"
+  },
+  "include": [
+    "src/**/*",
+    "e2e/**/*"
+  ],
+  "exclude": [
+    "node_modules",
+  ]
+}

integration/hooks/tslint.json

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+{
+    "defaultSeverity": "error",
+    "extends": [
+        "tslint:recommended"
+    ],
+    "jsRules": {
+        "no-unused-expression": true
+    },
+    "rules": {
+        "eofline": false,
+        "quotemark": [
+            true,
+            "single"
+        ],
+        "ordered-imports": [
+            false
+        ],
+        "max-line-length": [
+            150
+        ],
+        "member-ordering": [
+            false
+        ],
+        "curly": false,
+        "interface-name": [
+            false
+        ],
+        "array-type": [
+            false
+        ],
+        "member-access": [
+            false
+        ],
+        "no-empty-interface": false,
+        "no-empty": false,
+        "arrow-parens": false,
+        "object-literal-sort-keys": false,
+        "no-unused-expression": false,
+        "max-classes-per-file": [
+            false
+        ],
+        "variable-name": [
+            false
+        ],
+        "one-line": [
+            false
+        ],
+        "one-variable-per-declaration": [
+            false
+        ]
+    },
+    "rulesDirectory": []
+}