1 files changed, 49 insertions, 0 deletions

diff --git a/spec/frontend/issues/related_merge_requests/store/mutations_spec.js b/spec/frontend/issues/related_merge_requests/store/mutations_spec.js
new file mode 100644
index 00000000000..0e3d26b3879
--- /dev/null
+++ b/spec/frontend/issues/related_merge_requests/store/mutations_spec.js
@@ -0,0 +1,49 @@
+import * as types from '~/issues/related_merge_requests/store/mutation_types';
+import mutations from '~/issues/related_merge_requests/store/mutations';
+
+describe('RelatedMergeRequests Store Mutations', () => {
+  describe('SET_INITIAL_STATE', () => {
+    it('should set initial state according to given data', () => {
+      const apiEndpoint = '/api';
+      const state = {};
+
+      mutations[types.SET_INITIAL_STATE](state, { apiEndpoint });
+
+      expect(state.apiEndpoint).toEqual(apiEndpoint);
+    });
+  });
+
+  describe('REQUEST_DATA', () => {
+    it('should set loading flag', () => {
+      const state = {};
+
+      mutations[types.REQUEST_DATA](state);
+
+      expect(state.isFetchingMergeRequests).toEqual(true);
+    });
+  });
+
+  describe('RECEIVE_DATA_SUCCESS', () => {
+    it('should set loading flag and data', () => {
+      const state = {};
+      const mrs = [1, 2, 3];
+
+      mutations[types.RECEIVE_DATA_SUCCESS](state, { data: mrs, total: mrs.length });
+
+      expect(state.isFetchingMergeRequests).toEqual(false);
+      expect(state.mergeRequests).toEqual(mrs);
+      expect(state.totalCount).toEqual(mrs.length);
+    });
+  });
+
+  describe('RECEIVE_DATA_ERROR', () => {
+    it('should set loading and error flags', () => {
+      const state = {};
+
+      mutations[types.RECEIVE_DATA_ERROR](state);
+
+      expect(state.isFetchingMergeRequests).toEqual(false);
+      expect(state.hasErrorFetchingMergeRequests).toEqual(true);
+    });
+  });
+});