[Common UI] Continue filling in Browse specs

Continue filling in specs for scripts introduced as part
of bundle platform/commonUI/browse, which is responsible
for browse mode. WTD-574.

platform/commonUI/browse/test/navigation/NavigateActionSpec.js

@@ -9,6 +9,50 @@ define(
         "use strict";
 
         describe("The navigate action", function () {
+            var mockNavigationService,
+                mockQ,
+                actionContext,
+                mockDomainObject,
+                action;
+
+            function mockPromise(value) {
+                return {
+                    then: function (callback) {
+                        return mockPromise(callback(value));
+                    }
+                };
+            }
+
+            beforeEach(function () {
+                mockNavigationService = jasmine.createSpyObj(
+                    "navigationService",
+                    [ "setNavigation" ]
+                );
+                mockQ = { when: mockPromise };
+                mockDomainObject = jasmine.createSpyObj(
+                    "domainObject",
+                    [ "getId", "getModel", "getCapability" ]
+                );
+
+                action = new NavigateAction(
+                    mockNavigationService,
+                    mockQ,
+                    { domainObject: mockDomainObject }
+                );
+            });
+
+            it("invokes the navigate service when performed", function () {
+                action.perform();
+                expect(mockNavigationService.setNavigation)
+                    .toHaveBeenCalledWith(mockDomainObject);
+            });
+
+            it("is only applicable when a domain object is in context", function () {
+                expect(NavigateAction.appliesTo({})).toBeFalsy();
+                expect(NavigateAction.appliesTo({
+                    domainObject: mockDomainObject
+                })).toBeTruthy();
+            });
 
         });
     }