1 files changed, 129 insertions, 0 deletions
diff --git a/spec/frontend/popovers/components/popovers_spec.js b/spec/frontend/popovers/components/popovers_spec.js
new file mode 100644
index 00000000000..63e0b3d9c49
--- /dev/null
+++ b/spec/frontend/popovers/components/popovers_spec.js
@@ -0,0 +1,129 @@
+import { shallowMount } from '@vue/test-utils';
+import { GlPopover } from '@gitlab/ui';
+import { useMockMutationObserver } from 'helpers/mock_dom_observer';
+import Popovers from '~/popovers/components/popovers.vue';
+
+describe('popovers/components/popovers.vue', () => {
+  const { trigger: triggerMutate, observersCount } = useMockMutationObserver();
+  let wrapper;
+
+  const buildWrapper = (...targets) => {
+    wrapper = shallowMount(Popovers);
+    wrapper.vm.addPopovers(targets);
+    return wrapper.vm.$nextTick();
+  };
+
+  const createPopoverTarget = (options = {}) => {
+    const target = document.createElement('button');
+    const dataset = {
+      title: 'default title',
+      content: 'some content',
+      ...options,
+    };
+
+    Object.entries(dataset).forEach(([key, value]) => {
+      target.dataset[key] = value;
+    });
+
+    document.body.appendChild(target);
+
+    return target;
+  };
+
+  const allPopovers = () => wrapper.findAll(GlPopover);
+
+  afterEach(() => {
+    wrapper.destroy();
+    wrapper = null;
+  });
+
+  describe('addPopovers', () => {
+    it('attaches popovers to the targets specified', async () => {
+      const target = createPopoverTarget();
+      await buildWrapper(target);
+      expect(wrapper.find(GlPopover).props('target')).toBe(target);
+    });
+
+    it('does not attach a popover twice to the same element', async () => {
+      const target = createPopoverTarget();
+      buildWrapper(target);
+      wrapper.vm.addPopovers([target]);
+
+      await wrapper.vm.$nextTick();
+
+      expect(wrapper.findAll(GlPopover)).toHaveLength(1);
+    });
+
+    it('supports HTML content', async () => {
+      const content = 'content with <b>HTML</b>';
+      await buildWrapper(
+        createPopoverTarget({
+          content,
+          html: true,
+        }),
+      );
+      const html = wrapper.find(GlPopover).html();
+
+      expect(html).toContain(content);
+    });
+
+    it.each`
+      option         | value
+      ${'placement'} | ${'bottom'}
+      ${'triggers'}  | ${'manual'}
+    `('sets $option to $value when data-$option is set in target', async ({ option, value }) => {
+      await buildWrapper(createPopoverTarget({ [option]: value }));
+
+      expect(wrapper.find(GlPopover).props(option)).toBe(value);
+    });
+  });
+
+  describe('dispose', () => {
+    it('removes all popovers when elements is nil', async () => {
+      await buildWrapper(createPopoverTarget(), createPopoverTarget());
+
+      wrapper.vm.dispose();
+      await wrapper.vm.$nextTick();
+
+      expect(allPopovers()).toHaveLength(0);
+    });
+
+    it('removes the popovers that target the elements specified', async () => {
+      const target = createPopoverTarget();
+
+      await buildWrapper(target, createPopoverTarget());
+
+      wrapper.vm.dispose(target);
+      await wrapper.vm.$nextTick();
+
+      expect(allPopovers()).toHaveLength(1);
+    });
+  });
+
+  describe('observe', () => {
+    it('removes popover when target is removed from the document', async () => {
+      const target = createPopoverTarget();
+      await buildWrapper(target);
+
+      wrapper.vm.addPopovers([target, createPopoverTarget()]);
+      await wrapper.vm.$nextTick();
+
+      triggerMutate(document.body, {
+        entry: { removedNodes: [target] },
+        options: { childList: true },
+      });
+      await wrapper.vm.$nextTick();
+
+      expect(allPopovers()).toHaveLength(1);
+    });
+  });
+
+  it('disconnects mutation observer on beforeDestroy', async () => {
+    await buildWrapper(createPopoverTarget());
+
+    expect(observersCount()).toBe(1);
+
+    wrapper.destroy();
+    expect(observersCount()).toBe(0);
+  });
+});