[globocom#11] Introduces SandboxResponse

As described on the issue globocom#11 this introuces the SandboxResponse object
that makes possible for the function to send custom body, headers and
status code

lib/domain/sandbox/SandboxResponse.js

@@ -0,0 +1,26 @@
+
+class SandboxResponse {
+  constructor({ callback }) {
+    this.callback = callback;
+    this.statusCode = 200;
+    this.headers = {};
+  }
+
+  set(key, value) {
+    this.headers[key] = value;
+  }
+
+  status(statusCode) {
+    this.statusCode = statusCode;
+    return this;
+  }
+
+  send(body) {
+    const status = this.statusCode || 200;
+    const headers = this.headers;
+    this.callback(null, { status, body, headers });
+  }
+
+}
+
+module.exports = SandboxResponse;

test/unit/domain/sandbox/SandboxResponse.test.js

@@ -0,0 +1,72 @@
+const expect = require('chai').expect;
+const SandboxResponse = require('../../../../lib/domain/sandbox/SandboxResponse');
+
+describe('SandboxResponse', () => {
+  describe('create a response successfully', () => {
+    let res;
+    let codeResponse;
+
+    before((done) => {
+      const callbackFn = (err, responseData) => {
+        codeResponse = responseData;
+        done();
+      };
+      res = new SandboxResponse({
+        callback: callbackFn,
+      });
+      res.send({ result: 'ok' });
+    });
+
+    it('should sends the response with default status of 200', () => {
+      expect(codeResponse.body).to.be.eql({ result: 'ok' });
+      expect(codeResponse.status).to.be.eql(200);
+    });
+
+    it('should sends an empty header object when none is defined', () => {
+      expect(codeResponse.headers).to.be.eql({});
+    });
+  });
+
+  describe('create a response with created status code (201)', () => {
+    let res;
+    let codeResponse;
+
+    before((done) => {
+      const callbackFn = (err, responseData) => {
+        codeResponse = responseData;
+        done();
+      };
+      res = new SandboxResponse({
+        callback: callbackFn,
+      });
+      res.status(201).send({ content: { name: 'foobar' } });
+    });
+
+    it('should sends the response with status of 201', () => {
+      expect(codeResponse.body).to.be.eql({ content: { name: 'foobar' } });
+      expect(codeResponse.status).to.be.eql(201);
+    });
+  });
+
+  describe('set headers to be send as response', () => {
+    let res;
+    let codeResponse;
+
+    before((done) => {
+      const callbackFn = (err, responseData) => {
+        codeResponse = responseData;
+        done();
+      };
+      res = new SandboxResponse({
+        callback: callbackFn,
+      });
+      res.set('X-FOO', 'bar');
+      res.send({ result: 'ok' });
+    });
+
+    it('should sends the response with default status of 200', () => {
+      expect(codeResponse.body).to.be.eql({ result: 'ok' });
+      expect(codeResponse.status).to.be.eql(200);
+    });
+  });
+});