private _adapter, ES6 setters and getters

spec/AdaptableController.spec.js

@@ -15,6 +15,11 @@ describe("AdaptableController", ()=>{
     var adapter = new FilesAdapter();
     var controller = new FilesController(adapter);
     expect(controller.adapter).toBe(adapter);
+    // make sure _adapter is private
+    expect(controller._adapter).toBe(undefined);
+    // Override _adapter is not doing anything
+    controller._adapter = "Hello";
+    expect(controller.adapter).toBe(adapter);
     done();
   });
   
@@ -26,6 +31,17 @@ describe("AdaptableController", ()=>{
     done();
   });
   
+  it("should fail setting the wrong adapter to the controller", (done) => {
+    function WrongAdapter() {};
+    var adapter = new FilesAdapter();
+    var controller = new FilesController(adapter);
+    var otherAdapter = new WrongAdapter();
+    expect(() => {
+      controller.adapter = otherAdapter;
+    }).toThrow();
+    done();
+  });
+  
   it("should fail to instantiate a controller with wrong adapter", (done) => {
     function WrongAdapter() {};
     var adapter = new WrongAdapter();
@@ -41,4 +57,31 @@ describe("AdaptableController", ()=>{
     }).toThrow();
     done();
   });
+  
+  it("should accept an object adapter", (done) => {
+    var adapter = {
+      createFile: function(config, filename, data) { },
+      deleteFile: function(config, filename) { },
+      getFileData: function(config, filename) { },
+      getFileLocation: function(config, filename) { },
+    }
+    expect(() => {
+      new FilesController(adapter);
+    }).not.toThrow();
+    done();
+  });
+  
+  it("should accept an object adapter", (done) => {
+    function AGoodAdapter() {};
+    AGoodAdapter.prototype.createFile = function(config, filename, data) { };
+    AGoodAdapter.prototype.deleteFile = function(config, filename) { };
+    AGoodAdapter.prototype.getFileData = function(config, filename) { };
+    AGoodAdapter.prototype.getFileLocation = function(config, filename) { };
+    
+    var adapter = new AGoodAdapter();
+    expect(() => {
+      new FilesController(adapter);
+    }).not.toThrow();
+    done();
+  });
 });

src/Controllers/AdaptableController.js

@@ -8,26 +8,22 @@ based on the parameters passed
 
  */
 
+// _adapter is private, use Symbol
+var _adapter = Symbol();
+
 export class AdaptableController {
-   /**
-   * Check whether the api call has master key or not.
-   * @param {options} the adapter options
-   * @param {defaultAdapter} the default adapter class or object to use
-   * @discussion
-   * Supported options types:
-   * - string: the options will be loaded with required, when loaded, if default 
-   * is set on the returned object, we'll use that one to support modules
-   * - object: a plain javascript object (options.constructor === Object), if options.adapter is set, we'll try to load it with the same mechanics.
-   * - function: we'll create a new instance from that function, and pass the options object
-   */ 
-  constructor(adapter, options) {
-    this.setAdapter(adapter, options);
+
+  constructor(adapter) {
+    this.adapter = adapter;
+  }
+
+  set adapter(adapter) {
+    this.validateAdapter(adapter);
+    this[_adapter] = adapter;
   }
   
-  setAdapter(adapter, options) {
-    this.validateAdapter(adapter);
-    this.adapter = adapter;
-    this.options = options;
+  get adapter() {
+    return this[_adapter];
   }
   
   expectedAdapterType() {