Added unit test for fetchDiscussionsBatch

spec/frontend/notes/stores/actions_spec.js

@@ -1407,7 +1407,7 @@ describe('Actions Notes Store', () => {
       axiosMock.onAny().reply(200, { discussion });
       testAction(
         actions.fetchDiscussions,
-        true,
+        {},
         null,
         [
           { type: mutationTypes.ADD_OR_UPDATE_DISCUSSIONS, payload: { discussion } },
@@ -1423,13 +1423,61 @@ describe('Actions Notes Store', () => {
 
       testAction(
         actions.fetchDiscussions,
-        true,
+        { path: 'test-path', filter: 'test-filter', persistFilter: 'test-persist-filter' },
         null,
         [],
         [
           {
             type: 'fetchDiscussionsBatch',
-            payload: { config: null, path: undefined, perPage: 20 },
+            payload: {
+              config: {
+                params: { notes_filter: 'test-filter', persist_filter: 'test-persist-filter' },
+              },
+              path: 'test-path',
+              perPage: 20,
+            },
+          },
+        ],
+        done,
+      );
+    });
+  });
+
+  describe('fetchDiscussionsBatch', () => {
+    const discussion = { notes: [] };
+
+    const config = {
+      params: { notes_filter: 'test-filter', persist_filter: 'test-persist-filter' },
+    };
+
+    const actionPayload = { config, path: 'test-path', perPage: 20 };
+
+    it('updates the discussions and dispatches `updateResolvableDiscussionsCounts if there are no headers', (done) => {
+      axiosMock.onAny().reply(200, { discussion }, {});
+      testAction(
+        actions.fetchDiscussionsBatch,
+        actionPayload,
+        null,
+        [
+          { type: mutationTypes.ADD_OR_UPDATE_DISCUSSIONS, payload: { discussion } },
+          { type: mutationTypes.SET_FETCHING_DISCUSSIONS, payload: false },
+        ],
+        [{ type: 'updateResolvableDiscussionsCounts' }],
+        done,
+      );
+    });
+
+    it('dispatches itself if there is `x-next-page-cursor` header', (done) => {
+      axiosMock.onAny().reply(200, { discussion }, { 'x-next-page-cursor': 1 });
+      testAction(
+        actions.fetchDiscussionsBatch,
+        actionPayload,
+        null,
+        [{ type: mutationTypes.ADD_OR_UPDATE_DISCUSSIONS, payload: { discussion } }],
+        [
+          {
+            type: 'fetchDiscussionsBatch',
+            payload: { ...actionPayload, perPage: 30, cursor: 1 },
           },
         ],
         done,