1 files changed, 166 insertions, 0 deletions
diff --git a/spec/frontend/shared/popover_spec.js b/spec/frontend/shared/popover_spec.js
new file mode 100644
index 00000000000..bbde936185e
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+++ b/spec/frontend/shared/popover_spec.js
@@ -0,0 +1,166 @@
+import $ from 'jquery';
+import { togglePopover, mouseleave, mouseenter } from '~/shared/popover';
+
+describe('popover', () => {
+  describe('togglePopover', () => {
+    describe('togglePopover(true)', () => {
+      it('returns true when popover is shown', () => {
+        const context = {
+          hasClass: () => false,
+          popover: () => {},
+          toggleClass: () => {},
+        };
+
+        expect(togglePopover.call(context, true)).toEqual(true);
+      });
+
+      it('returns false when popover is already shown', () => {
+        const context = {
+          hasClass: () => true,
+        };
+
+        expect(togglePopover.call(context, true)).toEqual(false);
+      });
+
+      it('shows popover', done => {
+        const context = {
+          hasClass: () => false,
+          popover: () => {},
+          toggleClass: () => {},
+        };
+
+        jest.spyOn(context, 'popover').mockImplementation(method => {
+          expect(method).toEqual('show');
+          done();
+        });
+
+        togglePopover.call(context, true);
+      });
+
+      it('adds disable-animation and js-popover-show class', done => {
+        const context = {
+          hasClass: () => false,
+          popover: () => {},
+          toggleClass: () => {},
+        };
+
+        jest.spyOn(context, 'toggleClass').mockImplementation((classNames, show) => {
+          expect(classNames).toEqual('disable-animation js-popover-show');
+          expect(show).toEqual(true);
+          done();
+        });
+
+        togglePopover.call(context, true);
+      });
+    });
+
+    describe('togglePopover(false)', () => {
+      it('returns true when popover is hidden', () => {
+        const context = {
+          hasClass: () => true,
+          popover: () => {},
+          toggleClass: () => {},
+        };
+
+        expect(togglePopover.call(context, false)).toEqual(true);
+      });
+
+      it('returns false when popover is already hidden', () => {
+        const context = {
+          hasClass: () => false,
+        };
+
+        expect(togglePopover.call(context, false)).toEqual(false);
+      });
+
+      it('hides popover', done => {
+        const context = {
+          hasClass: () => true,
+          popover: () => {},
+          toggleClass: () => {},
+        };
+
+        jest.spyOn(context, 'popover').mockImplementation(method => {
+          expect(method).toEqual('hide');
+          done();
+        });
+
+        togglePopover.call(context, false);
+      });
+
+      it('removes disable-animation and js-popover-show class', done => {
+        const context = {
+          hasClass: () => true,
+          popover: () => {},
+          toggleClass: () => {},
+        };
+
+        jest.spyOn(context, 'toggleClass').mockImplementation((classNames, show) => {
+          expect(classNames).toEqual('disable-animation js-popover-show');
+          expect(show).toEqual(false);
+          done();
+        });
+
+        togglePopover.call(context, false);
+      });
+    });
+  });
+
+  describe('mouseleave', () => {
+    it('calls hide popover if .popover:hover is false', () => {
+      const fakeJquery = {
+        length: 0,
+      };
+
+      jest
+        .spyOn($.fn, 'init')
+        .mockImplementation(selector => (selector === '.popover:hover' ? fakeJquery : $.fn));
+      jest.spyOn(togglePopover, 'call').mockImplementation(() => {});
+      mouseleave();
+
+      expect(togglePopover.call).toHaveBeenCalledWith(expect.any(Object), false);
+    });
+
+    it('does not call hide popover if .popover:hover is true', () => {
+      const fakeJquery = {
+        length: 1,
+      };
+
+      jest
+        .spyOn($.fn, 'init')
+        .mockImplementation(selector => (selector === '.popover:hover' ? fakeJquery : $.fn));
+      jest.spyOn(togglePopover, 'call').mockImplementation(() => {});
+      mouseleave();
+
+      expect(togglePopover.call).not.toHaveBeenCalledWith(false);
+    });
+  });
+
+  describe('mouseenter', () => {
+    const context = {};
+
+    it('shows popover', () => {
+      jest.spyOn(togglePopover, 'call').mockReturnValue(false);
+      mouseenter.call(context);
+
+      expect(togglePopover.call).toHaveBeenCalledWith(expect.any(Object), true);
+    });
+
+    it('registers mouseleave event if popover is showed', done => {
+      jest.spyOn(togglePopover, 'call').mockReturnValue(true);
+      jest.spyOn($.fn, 'on').mockImplementation(eventName => {
+        expect(eventName).toEqual('mouseleave');
+        done();
+      });
+      mouseenter.call(context);
+    });
+
+    it('does not register mouseleave event if popover is not showed', () => {
+      jest.spyOn(togglePopover, 'call').mockReturnValue(false);
+      const spy = jest.spyOn($.fn, 'on').mockImplementation(() => {});
+      mouseenter.call(context);
+
+      expect(spy).not.toHaveBeenCalled();
+    });
+  });
+});