Add tests for custom serialization

Author: digitalsadhu

test/override-serializer.test.js

@@ -0,0 +1,124 @@
+var request = require('supertest');
+var loopback = require('loopback');
+var expect = require('chai').expect;
+var JSONAPIComponent = require('../');
+var app;
+var Post;
+var Comment;
+
+describe('hook in to modify serialization process', function () {
+  beforeEach(function (done) {
+    app = loopback();
+    app.set('legacyExplorer', false);
+    var ds = loopback.createDataSource('memory');
+
+    Post = ds.createModel('post', { title: String, content: String, other: String });
+    app.model(Post);
+
+    Comment = ds.createModel('comment', { title: String, comment: String, other: String });
+    app.model(Comment);
+
+    app.use(loopback.rest());
+
+    Post.create({title: 'my post', content: 'my post content', other: 'my post other'}, function () {
+      Comment.create({title: 'my comment title', comment: 'my comment', other: 'comment other'}, done);
+    });
+
+    JSONAPIComponent(app);
+  });
+
+  describe('before serialization', function () {
+    beforeEach(function () {
+      Post.beforeJsonApiSerialize = function (options, cb) {
+        options.type = 'notPosts';
+        cb(null, options);
+      };
+    });
+    afterEach(function () {
+      delete Post.beforeJsonApiSerialize;
+    });
+    it('should allow options to be modified before serialization', function (done) {
+      request(app).get('/posts')
+        .expect(200)
+        .end(function (err, res) {
+          expect(err).to.equal(null);
+          expect(res.body.data[0].type).to.equal('notPosts');
+          done();
+        });
+    });
+    it('should not affect models without a beforeJsonApiSerialize method', function (done) {
+      request(app).get('/comments')
+        .expect(200)
+        .end(function (err, res) {
+          expect(err).to.equal(null);
+          expect(res.body.data[0].type).to.equal('comments');
+          done();
+        });
+    });
+  });
+
+  describe('after serialization', function () {
+    beforeEach(function () {
+      Post.afterJsonApiSerialize = function (options, cb) {
+        options.results.data = options.results.data.map(function (result) {
+          result.attributes.testing = true;
+          return result;
+        });
+        cb(null, options);
+      };
+    });
+    afterEach(function () {
+      delete Post.afterJsonApiSerialize;
+    });
+    it('should allow results to be modified after serialization', function (done) {
+      request(app).get('/posts')
+        .expect(200)
+        .end(function (err, res) {
+          expect(err).to.equal(null);
+          expect(res.body.data[0].attributes.testing).to.equal(true);
+          done();
+        });
+    });
+    it('should not affect models without an afterJsonApiSerialize method', function (done) {
+      request(app).get('/comments')
+        .expect(200)
+        .end(function (err, res) {
+          expect(err).to.equal(null);
+          expect(res.body.data[0].attributes.testing).to.equal(undefined);
+          done();
+        });
+    });
+  });
+
+  describe('custom serialization', function () {
+    beforeEach(function () {
+      Post.jsonApiSerialize = function (options, cb) {
+        options.results = options.results.map(function (result) {
+          return result.title;
+        });
+        cb(null, options);
+      };
+    });
+    afterEach(function () {
+      delete Post.jsonApiSerialize;
+    });
+    it('should allow a custom serializer to be defined for a model', function (done) {
+      request(app).get('/posts')
+        .expect(200)
+        .end(function (err, res) {
+          expect(err).to.equal(null);
+          expect(res.body[0]).to.equal('my post');
+          done();
+        });
+    });
+    it('should not affect models without a jsonApiSerialize method', function (done) {
+      request(app).get('/comments')
+        .expect(200)
+        .end(function (err, res) {
+          expect(err).to.equal(null);
+          expect(res.body.data[0].attributes.title).to.equal('my comment title');
+          done();
+        });
+    });
+  });
+});