add tests and rename flight availabilities method

Author: tsolakoua

README.md

@@ -258,7 +258,7 @@ amadeus.shopping.seatmaps.get({
 });
 
 // Flight Availabilities Search
-amadeus.shopping.availability.flight_availabilities.post(body);
+amadeus.shopping.availability.flightAvailabilities.post(body);
 
 // Flight Choice Prediction
 amadeus.shopping.flightOffersSearch.get({

spec/amadeus/namespaces.test.js

@@ -66,6 +66,9 @@ describe('Namespaces', () => {
       expect(amadeus.shopping.hotelOffersByHotel).toBeDefined();
       expect(amadeus.shopping.hotelOffer).toBeDefined();
 
+      expect(amadeus.shopping.availability).toBeDefined();
+      expect(amadeus.shopping.availability.flightAvailabilities).toBeDefined();
+
       expect(amadeus.booking.flightOrder).toBeDefined();
       expect(amadeus.booking.hotelBookings).toBeDefined();
 
@@ -448,5 +451,14 @@ describe('Namespaces', () => {
       expect(amadeus.client.get)
         .toHaveBeenCalledWith('/v1/safety/safety-rated-locations/XXX');
     });
+
+    it('.amadeus.shopping.availability.flightAvailabilities.post', () => {
+      amadeus.client.post = jest.fn();
+      amadeus.shopping.availability.flightAvailabilities.post();
+      expect(amadeus.client.post)
+        .toHaveBeenCalledWith('/v1/shopping/availability/flight-availabilities', {});
+    });
+
+
   });
 });

src/amadeus/namespaces/shopping/availability.js

@@ -18,7 +18,7 @@ import FlightAvailabilities from './availability/flight_availabilities';
 class Availability {
   constructor(client) {
     this.client = client;
-    this.flight_availabilities = new FlightAvailabilities(client);
+    this.flightAvailabilities = new FlightAvailabilities(client);
   }
 }
 

src/amadeus/namespaces/shopping/availability/flight_availabilities.js

@@ -23,7 +23,7 @@ class FlightAvailabilities {
    * @return {Promise.<Response,ResponseError>} a Promise
    *
    * ```js
-   * amadeus.shopping.availability.flight_availabilities.post(body);
+   * amadeus.shopping.availability.flightAvailabilities.post(body);
    * ```
    */
   post(params = {}) {