ScrollTop tests added

src/components/scrolltop/ScrollTop.spec.js

@@ -0,0 +1,16 @@
+import { mount } from '@vue/test-utils';
+import ScrollTop from './ScrollTop.vue';
+
+describe('ScrollTop.vue', () => {
+    let wrapper;
+
+    beforeEach(() => {
+        wrapper = mount(ScrollTop);
+    });
+
+    it('should exist', async() => {
+        await wrapper.setData({ visible: true });
+
+        expect(wrapper.find('.p-scrolltop.p-component').exists()).toBe(true);
+    });
+});