Add bodyParser

Add bodyParser Module and Test
It is needed for handling a request as post

ISSUE=lunchclass#458

server/base/application.ts

@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+import * as bodyParser from 'body-parser';
 import * as express from 'express';
 import * as path from 'path';
 
@@ -24,14 +25,18 @@ export class Application {
   private static app: express.Application = express();
 
   public static async START(): Promise<void> {
-    await import('../example/example.router');
     this.app.use(express.static(path.join(__dirname, '../client')));
+    this.app.use(bodyParser.json());
+    this.app.use(bodyParser.urlencoded({ extended: true }));
+    await import('../example/example.router');
     this.app.listen(8090);
   }
 
   public static async START_FOR_TESTING(): Promise<express.Application> {
-    await import('../example/example.router');
     this.app.use(express.static(path.join(__dirname, '../../out/client')));
+    this.app.use(bodyParser.json());
+    this.app.use(bodyParser.urlencoded({ extended: true }));
+    await import('../example/example.router');
 
     return this.app;
   }

server/example/example.router.ts

@@ -25,4 +25,15 @@ export class ExampleRouter {
   public get(request: express.Request, response: express.Response): void {
     response.send('hello world');
   }
+  public post(request: express.Request, response: express.Response): void {
+    if (request.body) {
+      if (request.body.exampleParam === 'example') {
+        response.sendStatus(200);
+      } else {
+        response.sendStatus(400);
+      }
+    } else {
+      response.sendStatus(501);
+    }
+  } 
 }

server/example/example.test.ts

@@ -24,3 +24,15 @@ test('GET /example', async() => {
   expect(response.statusCode).toBe(200);
   expect(response.text).toBe('hello world');
 });
+
+test('POST x-www-form-urlencoded', async() => {
+  const request: {} = supertest(await Application.START_FOR_TESTING());
+  const response: {} = await request.post('/example').set('Content-Type', 'application/x-www-form-urlencoded').send('exampleParam=example');
+  expect(response.statusCode).toBe(200);
+});
+
+test('POST json', async() => {
+  const request: {} = supertest(await Application.START_FOR_TESTING());
+  const response: {} = await request.post('/example').set('Content-Type', 'application/json').send('{"exampleParam": "example"}');
+  expect(response.statusCode).toBe(200);
+});