From 4ff81b4035e2d82ba662ca312dfac463f76581db Mon Sep 17 00:00:00 2001
From: Kai Moseley <kai.moseley@onfido.com>
Date: Tue, 17 Oct 2017 17:28:25 +0100
Subject: [PATCH] feat(object-reducers): replace will now shallow merge with
 initial state

---
 src/reducers/__tests__/objectReducer.test.js | 4 ++--
 src/reducers/objectReducer.js                | 7 +++++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/reducers/__tests__/objectReducer.test.js b/src/reducers/__tests__/objectReducer.test.js
index 2a60c52..cfca9cf 100644
--- a/src/reducers/__tests__/objectReducer.test.js
+++ b/src/reducers/__tests__/objectReducer.test.js
@@ -17,8 +17,8 @@ describe('ObjectReducer', () => {
             it('reducer should return the state if the payload is undefined', () => {
                 expect(replace.reducer({ foo: 1 }, undefined)).toEqual({ foo: 1 });
             });
-            it('reducer should return the new state', () => {
-                expect(replace.reducer({ foo: 1 }, { foo: 2 })).toEqual({ foo: 2 });
+            it('reducer should return the new state combined with the initial state', () => {
+                expect(replace.reducer({ foo: 1, bar: 3 }, { foo: 2 }, { foo: 1, bar: 5 })).toEqual({ foo: 2, bar: 5 });
             });
         });
 
diff --git a/src/reducers/objectReducer.js b/src/reducers/objectReducer.js
index 324341d..9d589a9 100644
--- a/src/reducers/objectReducer.js
+++ b/src/reducers/objectReducer.js
@@ -73,9 +73,12 @@ export const DEFAULT_SHAPE_BEHAVIORS: ShapeReducerBehaviorsConfig = {
         validate: false,
     },
     replace: {
-        reducer(state, payload) {
+        reducer(state, payload, initialState) {
             if (!payload) return state;
-            return payload;
+            return {
+              ...initialState,
+              ...payload,
+            };
         },
         validate: true,
     }