fix(MultiIndex): reset page to 1 when share widgets refine (#312)

packages/react-instantsearch/src/core/indexUtils.js

@@ -39,6 +39,21 @@ export function refineValue(
         )
       : refineMultiIndex(searchState, nextRefinement, context, resetPage);
   } else {
+    /* 
+      If we have a multi index page with shared widgets we should also reset their page to 1
+      see: https://github.com/algolia/react-instantsearch/issues/310
+    */
+    if (searchState.indices) {
+      Object.keys(searchState.indices).forEach(targetedIndex => {
+        searchState = refineValue(
+          searchState,
+          { page: 1 },
+          { multiIndexContext: { targetedIndex } },
+          true,
+          namespace
+        );
+      });
+    }
     return namespace
       ? refineSingleIndexWithNamespace(
           searchState,

packages/react-instantsearch/src/core/indexUtils.test.js

@@ -238,7 +238,7 @@ describe('utility method for manipulating the search state', () => {
     });
   });
   describe('when there are multiple index', () => {
-    const context = { multiIndexContext: { targetedIndex: 'first' } };
+    let context = { multiIndexContext: { targetedIndex: 'first' } };
     it('refine with no namespace', () => {
       let searchState = {};
       let nextRefinement = { refinement: 'refinement' };
@@ -516,5 +516,20 @@ describe('utility method for manipulating the search state', () => {
 
       expect(results).toEqual({ some: 'results' });
     });
+
+    it('refine shared widgets should reset indices page to 1', () => {
+      context = {};
+      let searchState = {
+        indices: { first: { page: 3 }, second: { page: 3 } },
+      };
+      const nextRefinement = { query: 'new' };
+
+      searchState = refineValue(searchState, nextRefinement, context);
+
+      expect(searchState).toEqual({
+        query: 'new',
+        indices: { first: { page: 1 }, second: { page: 1 } },
+      });
+    });
   });
 });