1 files changed, 104 insertions, 0 deletions
diff --git a/spec/frontend/popovers/index_spec.js b/spec/frontend/popovers/index_spec.js
new file mode 100644
index 00000000000..ea3b78332d7
--- /dev/null
+++ b/spec/frontend/popovers/index_spec.js
@@ -0,0 +1,104 @@
+import { initPopovers, dispose, destroy } from '~/popovers';
+
+describe('popovers/index.js', () => {
+  let popoversApp;
+
+  const createPopoverTarget = (trigger = 'hover') => {
+    const target = document.createElement('button');
+    const dataset = {
+      title: 'default title',
+      content: 'some content',
+      toggle: 'popover',
+      trigger,
+    };
+
+    Object.entries(dataset).forEach(([key, value]) => {
+      target.dataset[key] = value;
+    });
+
+    document.body.appendChild(target);
+
+    return target;
+  };
+
+  const buildPopoversApp = () => {
+    popoversApp = initPopovers('[data-toggle="popover"]');
+  };
+
+  const triggerEvent = (target, eventName = 'mouseenter') => {
+    const event = new Event(eventName);
+
+    target.dispatchEvent(event);
+  };
+
+  afterEach(() => {
+    document.body.innerHTML = '';
+    destroy();
+  });
+
+  describe('initPopover', () => {
+    it('attaches a GlPopover for the elements specified in the selector', async () => {
+      const target = createPopoverTarget();
+
+      buildPopoversApp();
+
+      triggerEvent(target);
+
+      await popoversApp.$nextTick();
+      const html = document.querySelector('.gl-popover').innerHTML;
+
+      expect(document.querySelector('.gl-popover')).not.toBe(null);
+      expect(html).toContain('default title');
+      expect(html).toContain('some content');
+    });
+
+    it('supports triggering a popover via custom events', async () => {
+      const trigger = 'click';
+      const target = createPopoverTarget(trigger);
+
+      buildPopoversApp();
+      triggerEvent(target, trigger);
+
+      await popoversApp.$nextTick();
+
+      expect(document.querySelector('.gl-popover')).not.toBe(null);
+      expect(document.querySelector('.gl-popover').innerHTML).toContain('default title');
+    });
+
+    it('inits popovers on targets added after content load', async () => {
+      buildPopoversApp();
+
+      expect(document.querySelector('.gl-popover')).toBe(null);
+
+      const trigger = 'click';
+      const target = createPopoverTarget(trigger);
+      triggerEvent(target, trigger);
+      await popoversApp.$nextTick();
+
+      expect(document.querySelector('.gl-popover')).not.toBe(null);
+    });
+  });
+
+  describe('dispose', () => {
+    it('removes popovers that target the elements specified', async () => {
+      const fakeTarget = createPopoverTarget();
+      const target = createPopoverTarget();
+      buildPopoversApp();
+      triggerEvent(target);
+      triggerEvent(createPopoverTarget());
+      await popoversApp.$nextTick();
+
+      expect(document.querySelectorAll('.gl-popover')).toHaveLength(2);
+
+      dispose([fakeTarget]);
+      await popoversApp.$nextTick();
+
+      expect(document.querySelectorAll('.gl-popover')).toHaveLength(2);
+
+      dispose([target]);
+      await popoversApp.$nextTick();
+
+      expect(document.querySelectorAll('.gl-popover')).toHaveLength(1);
+    });
+  });
+});