Jestify activities spec

Also add `jQuery` to global in `test_setup`.
This was needed because:
- `vendor/jquery.endless-scroll` depends on it.
- Adding it to `global` in the spec itself didn't work.

1 files changed, 70 insertions, 0 deletions

diff --git a/spec/frontend/activities_spec.js b/spec/frontend/activities_spec.js
new file mode 100644
index 00000000000..d14be3a1f26
--- /dev/null
+++ b/spec/frontend/activities_spec.js
@@ -0,0 +1,70 @@
+/* eslint-disable no-unused-expressions, no-prototype-builtins, no-new, no-shadow */
+
+import $ from 'jquery';
+import Activities from '~/activities';
+import Pager from '~/pager';
+
+describe('Activities', () => {
+  window.gon || (window.gon = {});
+  const fixtureTemplate = 'static/event_filter.html';
+  const filters = [
+    {
+      id: 'all',
+    },
+    {
+      id: 'push',
+      name: 'push events',
+    },
+    {
+      id: 'merged',
+      name: 'merge events',
+    },
+    {
+      id: 'comments',
+    },
+    {
+      id: 'team',
+    },
+  ];
+
+  function getEventName(index) {
+    const filter = filters[index];
+    return filter.hasOwnProperty('name') ? filter.name : filter.id;
+  }
+
+  function getSelector(index) {
+    const filter = filters[index];
+    return `#${filter.id}_event_filter`;
+  }
+
+  beforeEach(() => {
+    loadFixtures(fixtureTemplate);
+    jest.spyOn(Pager, 'init').mockImplementation(() => {});
+    new Activities();
+  });
+
+  for (let i = 0; i < filters.length; i += 1) {
+    (i => {
+      describe(`when selecting ${getEventName(i)}`, () => {
+        beforeEach(() => {
+          $(getSelector(i)).click();
+        });
+
+        for (let x = 0; x < filters.length; x += 1) {
+          (x => {
+            const shouldHighlight = i === x;
+            const testName = shouldHighlight ? 'should highlight' : 'should not highlight';
+
+            it(`${testName} ${getEventName(x)}`, () => {
+              expect(
+                $(getSelector(x))
+                  .parent()
+                  .hasClass('active'),
+              ).toEqual(shouldHighlight);
+            });
+          })(x);
+        }
+      });
+    })(i);
+  }
+});