Refactor endpoint query component, add additional tests

assets/js/src/newsletter_editor/components/wordpress.js

@@ -6,77 +6,52 @@ define([
   ], function(App, _, MailPoet) {
 
   var Module = {};
-  var postTypesCache,
-      taxonomiesCache = {},
-      termsCache = {},
-      postsCache = {},
-      transformedPostsCache = {};
+
+  Module._cachedQuery = _.memoize(function(args) {
+    return MailPoet.Ajax.post({
+      endpoint: 'wordpress',
+      action: args.action,
+      data: args.options || {},
+    });
+  }, JSON.stringify);
 
   Module.getPostTypes = function() {
-    if (!postTypesCache) {
-      postTypesCache = MailPoet.Ajax.post({
-        endpoint: 'wordpress',
+    return Module._cachedQuery({
       action: 'getPostTypes',
-        data: {},
+      options: {},
     }).then(function(types) {
       return _.values(types);
     });
-    }
-
-    return postTypesCache;
   };
 
   Module.getTaxonomies = function(postType) {
-    if (!taxonomiesCache[postType]) {
-      taxonomiesCache[postType] = MailPoet.Ajax.post({
-        endpoint: 'wordpress',
+    return Module._cachedQuery({
       action: 'getTaxonomies',
-        data: {
+      options: {
         postType: postType,
       },
     });
-    }
-
-    return taxonomiesCache[postType];
   };
 
   Module.getTerms = function(options) {
-    var key = JSON.stringify(options);
-    if (!termsCache[key]) {
-      termsCache[key] = MailPoet.Ajax.post({
-        endpoint: 'wordpress',
+    return Module._cachedQuery({
       action: 'getTerms',
-        data: options || {},
+      options: options,
     });
-    }
-
-    return termsCache[key];
   };
 
   Module.getPosts = function(options) {
-    var key = JSON.stringify(options);
-    if (!postsCache[key]) {
-      postsCache[key] = MailPoet.Ajax.post({
-        endpoint: 'wordpress',
+    return Module._cachedQuery({
       action: 'getPosts',
-        data: options || {},
+      options: options,
     });
-    }
-
-    return postsCache[key];
   };
 
   Module.getTransformedPosts = function(options) {
-    var key = JSON.stringify(options);
-    if (!transformedPostsCache[key]) {
-      transformedPostsCache[key] = MailPoet.Ajax.post({
-        endpoint: 'wordpress',
+    return Module._cachedQuery({
       action: 'getTransformedPosts',
-        data: options || {},
+      options: options,
     });
-    }
-
-    return transformedPostsCache[key];
   };
 
   App.on('start', function(options) {

tests/javascript/newsletter_editor/blocks/posts.spec.js

@@ -15,6 +15,13 @@ define([
     describe('model', function () {
       var model;
 
+      before(function() {
+        WordpressComponent.getPosts = function() {
+          var deferred = jQuery.Deferred();
+          return deferred;
+        };
+      });
+
       beforeEach(function () {
         global.stubChannel(EditorApplication);
         global.stubConfig(EditorApplication);

tests/javascript/newsletter_editor/components/wordpress.spec.js

@@ -178,4 +178,146 @@ define([
       mock.verify();
     });
   });
+
+  describe('getPosts', function() {
+    var injector;
+    beforeEach(function() {
+      injector = require('amd-inject-loader!newsletter_editor/components/wordpress');
+    });
+
+    it('sends options to endpoint', function() {
+      var spy,
+          post = function(params) {
+            var deferred = jQuery.Deferred();
+            deferred.resolve({});
+            return deferred;
+          },
+          module;
+      spy = sinon.spy(post);
+      module = injector({
+        "mailpoet": {
+          Ajax: {
+            post: spy,
+          },
+        },
+      });
+
+      module.getPosts({
+        type: 'posts',
+        search: 'some search term'
+      });
+      expect(spy.args[0][0].data).to.eql({
+        type: 'posts',
+        search: 'some search term'
+      });
+    });
+
+    it('fetches posts from the server', function() {
+      var module = injector({
+          "mailpoet": {
+            Ajax: {
+              post: function() {
+                var deferred = jQuery.Deferred();
+                deferred.resolve([{post_title: 'title 1'}, {post_title: 'post title 2'}]);
+                return deferred;
+              }
+            },
+          },
+        });
+      module.getPosts().done(function(posts) {
+        expect(posts).to.eql([{post_title: 'title 1'}, {post_title: 'post title 2'}]);
+      });
+    });
+
+    it('caches results', function() {
+      var deferred = jQuery.Deferred(),
+          mock = sinon.mock({ post: function() {} }).expects('post').once().returns(deferred),
+          module = injector({
+            "mailpoet": {
+              Ajax: {
+                post: mock,
+              },
+            },
+          });
+      deferred.resolve({
+        type: 'posts',
+        search: 'some search term'
+      });
+      module.getPosts({});
+      module.getPosts({});
+
+      mock.verify();
+    });
+  });
+
+  describe('getTransformedPosts', function() {
+    var injector;
+    beforeEach(function() {
+      injector = require('amd-inject-loader!newsletter_editor/components/wordpress');
+    });
+
+    it('sends options to endpoint', function() {
+      var spy,
+          post = function(params) {
+            var deferred = jQuery.Deferred();
+            deferred.resolve({});
+            return deferred;
+          },
+          module;
+      spy = sinon.spy(post);
+      module = injector({
+        "mailpoet": {
+          Ajax: {
+            post: spy,
+          },
+        },
+      });
+
+      module.getTransformedPosts({
+        type: 'posts',
+        posts: [1, 2]
+      });
+      expect(spy.args[0][0].data).to.eql({
+        type: 'posts',
+        posts: [1, 2],
+      });
+    });
+
+    it('fetches transformed posts from the server', function() {
+      var module = injector({
+          "mailpoet": {
+            Ajax: {
+              post: function() {
+                var deferred = jQuery.Deferred();
+                deferred.resolve([{type: 'text', text: 'something'}, {type: 'text', text: 'something else'}]);
+                return deferred;
+              }
+            },
+          },
+        });
+      module.getTransformedPosts().done(function(posts) {
+        expect(posts).to.eql([{type: 'text', text: 'something'}, {type: 'text', text: 'something else'}]);
+      });
+    });
+
+    it('caches results', function() {
+      var deferred = jQuery.Deferred(),
+          mock = sinon.mock({ post: function() {} }).expects('post').once().returns(deferred),
+          module = injector({
+            "mailpoet": {
+              Ajax: {
+                post: mock,
+              },
+            },
+          });
+      deferred.resolve({
+        type: 'posts',
+        posts: [1, 3],
+      });
+      module.getTransformedPosts({});
+      module.getTransformedPosts({});
+
+      mock.verify();
+    });
+  });
 });