Added specs for Promise

test/spec/modules/promise.spec.js

@@ -3,4 +3,72 @@
 
     // jshint unused: false
     var Promise = require('../../../src/js/modules/promise');
+
+    describe('Promise', function() {
+        it('should resolve promise with tasks which are defined before', function() {
+            var promise = new Promise(),
+                deferred = false;
+
+            promise.then(function() {
+                deferred = true;
+            });
+
+            promise.resolve();
+
+            expect(deferred).toBeTruthy();
+        });
+
+        it('should start tasks which are defined after resolving', function() {
+            var promise = new Promise(),
+                deferred = false;
+
+            promise.resolve();
+
+            promise.then(function() {
+                deferred = true;
+            });
+
+            expect(deferred).toBeTruthy();
+        });
+
+        it('should reject promise with tasks which are defined before', function() {
+            var promise = new Promise(),
+                rejected = false;
+
+            promise.then(null, function() {
+                rejected = true;
+            });
+
+            promise.reject();
+
+            expect(rejected).toBeTruthy();
+        });
+
+        it('should start fail tasks which are defined after rejecting', function() {
+            var promise = new Promise(),
+                rejected = false;
+
+            promise.reject();
+
+            promise.then(null, function() {
+                rejected = true;
+            });
+
+            expect(rejected).toBeTruthy();
+        });
+
+        it('shouldn\'t run callbacks twice when started twice', function() {
+            var promise = new Promise(),
+                resolved = 0;
+
+            promise.resolve();
+
+            promise.then(function() {
+                resolved++;
+                promise.run();
+            });
+
+            expect(resolved).toEqual(1);
+        });
+    });
 }());