1 files changed, 363 insertions, 0 deletions
diff --git a/spec/frontend_integration/fly_out_nav_browser_spec.js b/spec/frontend_integration/fly_out_nav_browser_spec.js
new file mode 100644
index 00000000000..ef2afa20528
--- /dev/null
+++ b/spec/frontend_integration/fly_out_nav_browser_spec.js
@@ -0,0 +1,363 @@
+import { GlBreakpointInstance } from '@gitlab/ui/dist/utils';
+import { SIDEBAR_COLLAPSED_CLASS } from '~/contextual_sidebar';
+import {
+  calculateTop,
+  showSubLevelItems,
+  canShowSubItems,
+  canShowActiveSubItems,
+  mouseEnterTopItems,
+  mouseLeaveTopItem,
+  getOpenMenu,
+  setOpenMenu,
+  mousePos,
+  getHideSubItemsInterval,
+  documentMouseMove,
+  getHeaderHeight,
+  setSidebar,
+  subItemsMouseLeave,
+} from '~/fly_out_nav';
+
+describe('Fly out sidebar navigation', () => {
+  let el;
+  let breakpointSize = 'lg';
+
+  const OLD_SIDEBAR_WIDTH = 200;
+  const CONTAINER_INITIAL_BOUNDING_RECT = {
+    x: 8,
+    y: 8,
+    width: 769,
+    height: 0,
+    top: 8,
+    right: 777,
+    bottom: 8,
+    left: 8,
+  };
+  const SUB_ITEMS_INITIAL_BOUNDING_RECT = {
+    x: 148,
+    y: 8,
+    width: 0,
+    height: 150,
+    top: 8,
+    right: 148,
+    bottom: 158,
+    left: 148,
+  };
+  const mockBoundingClientRect = (elem, rect) => {
+    jest.spyOn(elem, 'getBoundingClientRect').mockReturnValue(rect);
+  };
+
+  const findSubItems = () => document.querySelector('.sidebar-sub-level-items');
+  const mockBoundingRects = () => {
+    const subItems = findSubItems();
+    mockBoundingClientRect(el, CONTAINER_INITIAL_BOUNDING_RECT);
+    mockBoundingClientRect(subItems, SUB_ITEMS_INITIAL_BOUNDING_RECT);
+  };
+  const mockSidebarFragment = (styleProps = '') =>
+    `<div class="sidebar-sub-level-items" style="${styleProps}"></div>`;
+
+  beforeEach(() => {
+    el = document.createElement('div');
+    el.style.position = 'relative';
+    document.body.appendChild(el);
+
+    jest.spyOn(GlBreakpointInstance, 'getBreakpointSize').mockImplementation(() => breakpointSize);
+  });
+
+  afterEach(() => {
+    document.body.innerHTML = '';
+    breakpointSize = 'lg';
+    mousePos.length = 0;
+
+    setSidebar(null);
+  });
+
+  describe('calculateTop', () => {
+    it('returns boundingRect top', () => {
+      const boundingRect = {
+        top: 100,
+        height: 100,
+      };
+
+      expect(calculateTop(boundingRect, 100)).toBe(100);
+    });
+  });
+
+  describe('getHideSubItemsInterval', () => {
+    beforeEach(() => {
+      el.innerHTML = mockSidebarFragment('position: fixed; top: 0; left: 100px; height: 150px;');
+      mockBoundingRects();
+    });
+
+    it('returns 0 if currentOpenMenu is nil', () => {
+      setOpenMenu(null);
+      expect(getHideSubItemsInterval()).toBe(0);
+    });
+
+    it('returns 0 if mousePos is empty', () => {
+      expect(getHideSubItemsInterval()).toBe(0);
+    });
+
+    it('returns 0 when mouse above sub-items', () => {
+      showSubLevelItems(el);
+      documentMouseMove({
+        clientX: el.getBoundingClientRect().left,
+        clientY: el.getBoundingClientRect().top,
+      });
+      documentMouseMove({
+        clientX: el.getBoundingClientRect().left,
+        clientY: el.getBoundingClientRect().top - 50,
+      });
+
+      expect(getHideSubItemsInterval()).toBe(0);
+    });
+
+    it('returns 0 when mouse is below sub-items', () => {
+      const subItems = findSubItems();
+
+      showSubLevelItems(el);
+      documentMouseMove({
+        clientX: el.getBoundingClientRect().left,
+        clientY: el.getBoundingClientRect().top,
+      });
+      documentMouseMove({
+        clientX: el.getBoundingClientRect().left,
+        clientY: el.getBoundingClientRect().top - subItems.getBoundingClientRect().height + 50,
+      });
+
+      expect(getHideSubItemsInterval()).toBe(0);
+    });
+
+    it('returns 300 when mouse is moved towards sub-items', () => {
+      documentMouseMove({
+        clientX: el.getBoundingClientRect().left,
+        clientY: el.getBoundingClientRect().top,
+      });
+
+      showSubLevelItems(el);
+      documentMouseMove({
+        clientX: el.getBoundingClientRect().left + 20,
+        clientY: el.getBoundingClientRect().top + 10,
+      });
+
+      expect(getHideSubItemsInterval()).toBe(300);
+    });
+  });
+
+  describe('mouseLeaveTopItem', () => {
+    beforeEach(() => {
+      jest.spyOn(el.classList, 'remove');
+    });
+
+    it('removes is-over class if currentOpenMenu is null', () => {
+      setOpenMenu(null);
+
+      mouseLeaveTopItem(el);
+
+      expect(el.classList.remove).toHaveBeenCalledWith('is-over');
+    });
+
+    it('removes is-over class if currentOpenMenu is null & there are sub-items', () => {
+      setOpenMenu(null);
+      el.innerHTML = mockSidebarFragment('position: absolute');
+
+      mouseLeaveTopItem(el);
+
+      expect(el.classList.remove).toHaveBeenCalledWith('is-over');
+    });
+
+    it('does not remove is-over class if currentOpenMenu is the passed in sub-items', () => {
+      setOpenMenu(null);
+      el.innerHTML = mockSidebarFragment('position: absolute');
+
+      setOpenMenu(findSubItems());
+      mouseLeaveTopItem(el);
+
+      expect(el.classList.remove).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('mouseEnterTopItems', () => {
+    beforeEach(() => {
+      el.innerHTML = mockSidebarFragment(
+        `position: absolute; top: 0; left: 100px; height: ${OLD_SIDEBAR_WIDTH}px;`,
+      );
+      mockBoundingRects();
+    });
+
+    it('shows sub-items after 0ms if no menu is open', (done) => {
+      const subItems = findSubItems();
+      mouseEnterTopItems(el);
+
+      expect(getHideSubItemsInterval()).toBe(0);
+
+      setTimeout(() => {
+        expect(subItems.style.display).toBe('block');
+        done();
+      });
+    });
+
+    it('shows sub-items after 300ms if a menu is currently open', (done) => {
+      const subItems = findSubItems();
+
+      documentMouseMove({
+        clientX: el.getBoundingClientRect().left,
+        clientY: el.getBoundingClientRect().top,
+      });
+
+      setOpenMenu(subItems);
+
+      documentMouseMove({
+        clientX: el.getBoundingClientRect().left + 20,
+        clientY: el.getBoundingClientRect().top + 10,
+      });
+
+      mouseEnterTopItems(el, 0);
+
+      setTimeout(() => {
+        expect(subItems.style.display).toBe('block');
+
+        done();
+      });
+    });
+  });
+
+  describe('showSubLevelItems', () => {
+    beforeEach(() => {
+      el.innerHTML = mockSidebarFragment('position: absolute');
+    });
+
+    it('adds is-over class to el', () => {
+      jest.spyOn(el.classList, 'add');
+
+      showSubLevelItems(el);
+
+      expect(el.classList.add).toHaveBeenCalledWith('is-over');
+    });
+
+    it('does not show sub-items on mobile', () => {
+      breakpointSize = 'xs';
+
+      showSubLevelItems(el);
+
+      expect(findSubItems().style.display).not.toBe('block');
+    });
+
+    it('shows sub-items', () => {
+      showSubLevelItems(el);
+
+      expect(findSubItems().style.display).toBe('block');
+    });
+
+    it('shows collapsed only sub-items if icon only sidebar', () => {
+      const subItems = findSubItems();
+      const sidebar = document.createElement('div');
+      sidebar.classList.add(SIDEBAR_COLLAPSED_CLASS);
+      subItems.classList.add('is-fly-out-only');
+
+      setSidebar(sidebar);
+
+      showSubLevelItems(el);
+
+      expect(findSubItems().style.display).toBe('block');
+    });
+
+    it('does not show collapsed only sub-items if icon only sidebar', () => {
+      const subItems = findSubItems();
+      subItems.classList.add('is-fly-out-only');
+
+      showSubLevelItems(el);
+
+      expect(subItems.style.display).not.toBe('block');
+    });
+
+    it('sets transform of sub-items', () => {
+      const sidebar = document.createElement('div');
+      const subItems = findSubItems();
+
+      sidebar.style.width = `${OLD_SIDEBAR_WIDTH}px`;
+
+      document.body.appendChild(sidebar);
+
+      setSidebar(sidebar);
+      showSubLevelItems(el);
+
+      expect(subItems.style.transform).toBe(
+        `translate3d(${OLD_SIDEBAR_WIDTH}px, ${
+          Math.floor(el.getBoundingClientRect().top) - getHeaderHeight()
+        }px, 0)`,
+      );
+    });
+
+    it('sets is-above when element is above', () => {
+      const subItems = findSubItems();
+      mockBoundingRects();
+
+      subItems.style.height = `${window.innerHeight + el.offsetHeight}px`;
+      el.style.top = `${window.innerHeight - el.offsetHeight}px`;
+
+      jest.spyOn(subItems.classList, 'add');
+
+      showSubLevelItems(el);
+
+      expect(subItems.classList.add).toHaveBeenCalledWith('is-above');
+    });
+  });
+
+  describe('canShowSubItems', () => {
+    it('returns true if on desktop size', () => {
+      expect(canShowSubItems()).toBeTruthy();
+    });
+
+    it('returns false if on mobile size', () => {
+      breakpointSize = 'xs';
+
+      expect(canShowSubItems()).toBeFalsy();
+    });
+  });
+
+  describe('canShowActiveSubItems', () => {
+    it('returns true by default', () => {
+      expect(canShowActiveSubItems(el)).toBeTruthy();
+    });
+
+    it('returns false when active & expanded sidebar', () => {
+      const sidebar = document.createElement('div');
+      el.classList.add('active');
+
+      setSidebar(sidebar);
+
+      expect(canShowActiveSubItems(el)).toBeFalsy();
+    });
+
+    it('returns true when active & collapsed sidebar', () => {
+      const sidebar = document.createElement('div');
+      sidebar.classList.add(SIDEBAR_COLLAPSED_CLASS);
+      el.classList.add('active');
+
+      setSidebar(sidebar);
+
+      expect(canShowActiveSubItems(el)).toBeTruthy();
+    });
+  });
+
+  describe('subItemsMouseLeave', () => {
+    beforeEach(() => {
+      el.innerHTML = mockSidebarFragment('position: absolute');
+
+      setOpenMenu(findSubItems());
+    });
+
+    it('hides subMenu if element is not hovered', () => {
+      subItemsMouseLeave(el);
+
+      expect(getOpenMenu()).toBeNull();
+    });
+
+    it('does not hide subMenu if element is hovered', () => {
+      el.classList.add('is-over');
+      subItemsMouseLeave(el);
+
+      expect(getOpenMenu()).not.toBeNull();
+    });
+  });
+});