add install plugin tests

add no tabs test

src/plugins/tabs/pluginSpec.js

@@ -0,0 +1,110 @@
+/*****************************************************************************
+ * Open MCT, Copyright (c) 2014-2020, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT is licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * Open MCT includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+
+import {
+    createOpenMct,
+    resetApplicationState
+} from 'utils/testing';
+
+fdescribe("the tabs plugin", () => {
+    let openmct;
+
+    beforeEach((done) => {
+        openmct = createOpenMct();
+        openmct.on('start', done);
+        openmct.startHeadless();
+    });
+
+    afterEach(() => {
+        return resetApplicationState(openmct);
+    });
+
+    it("defines a tabs object that is creatable", () => {
+        const tabsType = openmct.types.get('tabs');
+
+        expect(tabsType.definition.creatable).toBe(true);
+    });
+
+    it("defines a form to configure the tabs object", () => {
+        const tabsType = openmct.types.get('tabs');
+
+        expect(tabsType.definition.form).toBeDefined();
+    });
+
+    it("provides a tabs view", () => {
+        const domainObject = {
+            identifier: {
+                namespace: '',
+                key: 'mock-tabs-object'
+            },
+            type: 'tabs'
+        };
+        const applicableViews = openmct.objectViews.get(domainObject);
+        const tabsView = applicableViews.find((viewProvider) => viewProvider.key === 'tabs');
+
+        expect(tabsView).toBeDefined();
+    });
+
+    describe("the tabs view", () => {
+        it("displays instructional text instead of tabs if no tabs exist", () => {
+            const domainObject = {
+                identifier: {
+                    namespace: '',
+                    key: 'mock-tabs-object'
+                },
+                type: 'tabs'
+            };
+            const element = document.createElement('div');
+            const child = document.createElement('div');
+            element.appendChild(child);
+
+            const applicableViews = openmct.objectViews.get(domainObject);
+            const tabsViewProvider = applicableViews.find((viewProvider) => viewProvider.key === 'tabs');
+            const tabsView = tabsViewProvider.view(domainObject, [domainObject]);
+            tabsView.show(child, true);
+
+            const noTabsElement = getNoTabsElement(element);
+
+            expect(noTabsElement).not.toBeNull();
+        });
+
+        it("creates a tab for each object dropped into the drop zone", () => {
+
+        });
+
+        it("creates a tab level for objects dropped into current tab view", () => {
+
+        });
+
+        it("removes a tab and tab contents", () => {
+
+        });
+    });
+
+    function getNoTabsElement(parent) {
+        return parent.querySelector('.c-tabs-view__empty-message');
+    }
+
+    function getTabElements(parent) {
+        return parent.querySelectorAll('.c-tabs-view__tab');
+    }
+});