fix(object): retain deletions to properties/array elements

package-lock.json

@@ -2002,7 +2002,7 @@
       "dependencies": {
         "jest-cli": {
           "version": "20.0.4",
-          "resolved": "https://registry.npmjs.org/jest-cli/-/jest-cli-20.0.4.tgz",
+          "resolved": "https://npm.onfido.co.uk:443/jest-cli/-/jest-cli-20.0.4.tgz",
           "integrity": "sha1-5TKxnYiuW8bEF+iwWTpv6VSx3JM=",
           "dev": true
         }

src/__tests__/buildStoreChunk.test.js

@@ -42,6 +42,9 @@ describe('buildStoreChunk', () => {
                     innerNested3: Types.reducer(Types.string('baz')),
                 }),
             }),
+            nested5: Types.reducer(Types.shape({
+              arrayExample: Types.arrayOf(Types.string()),
+            })),
         });
         const nonNestedChunk = buildStoreChunk('example2', Types.reducer(Types.string('foo')));
 
@@ -51,7 +54,7 @@ describe('buildStoreChunk', () => {
             }));
 
             it('Selectors object has the correct top level structure for a nested chunk', () => {
-                expect(Object.keys(chunk.selectors)).toEqual(['nested1', 'nested2', 'nested3', 'nested4']);
+                expect(Object.keys(chunk.selectors)).toEqual(['nested1', 'nested2', 'nested3', 'nested4', 'nested5']);
             });
             it('Selectors object is a function for a non-nested chunk', () => {
                 expect(isFunction(nonNestedChunk.selectors)).toBe(true);
@@ -69,7 +72,7 @@ describe('buildStoreChunk', () => {
 
         describe('Actions', () => {
             it('Actions object has the correct top level structure for a nested chunk', () => {
-                expect(Object.keys(chunk.actions)).toEqual(['nested1', 'nested2', 'nested3', 'nested4']);
+                expect(Object.keys(chunk.actions)).toEqual(['nested1', 'nested2', 'nested3', 'nested4', 'nested5']);
             });
             it('Actions object has the correct top level structure for a non nested chunk', () => {
                 expect(Object.keys(nonNestedChunk.actions)).toEqual(['replace', 'reset']);
@@ -97,6 +100,14 @@ describe('buildStoreChunk', () => {
                 store.dispatch(chunk.actions.nested1.reset());
                 expect(chunk.selectors.nested1(store.getState())).toEqual('foo');
             });
+
+            it('Dispatching an empty array property should replace existing array', () => {
+                store.dispatch(chunk.actions.nested5.replace({ arrayExample: ['2'] }));
+                store.dispatch(chunk.actions.nested5.update({ arrayExample: [] }));
+                expect(chunk.selectors.nested5(store.getState())).toEqual({
+                  arrayExample: [],
+                });
+            });
         });
 
         describe('Combined actions and selectors (non nested chunk)', () => {

src/__tests__/validatePayload.test.js

@@ -65,7 +65,10 @@ describe('Validation functionality', () => {
         });
         it('Array should return an empty array if a non-array is passed', () => {
             expect(validateArray('foo')).toEqual([]);
-        })
+        });
+        it('Array should allow an empty array', () => {
+            expect(validateArray([])).toEqual([]);
+        });
     });
 
     describe('Objects', () => {
@@ -138,6 +141,16 @@ describe('Validation functionality', () => {
                 test2: 'bar',
             });
         });
+
+        const testObjectStructure7 = Types.shape({
+            test1: Types.arrayOf(Types.string()),
+        });
+        it('Should allow an empty array to be passed for an array property', () => {
+            expect(validateShape(testObjectStructure7, { test1: [] })).toEqual({
+              test1: [],
+            });
+        });
+
     });
 
     describe('Non covered types', () => {

src/reducers/objectReducer.js

@@ -40,7 +40,6 @@ export type ShapeReducerOptions = {
 //==============================
 import isObject from 'lodash/isObject';
 import omit from 'lodash/omit';
-import merge from 'lodash/fp/merge';
 import { validateShape } from '../validatePayload';
 import { createReducerBehaviors } from '../reducers';
 import { PROP_TYPES } from '../structure';
@@ -119,16 +118,16 @@ export function createReducer(objectStructure: StructureType, behaviors: ShapeRe
         if (matchedBehaviors.length) {
             //Sanitize the payload using the reducer shape, then apply the sanitized
             //payload to the state using the behavior linked to this action type.
-            return reduce((interimState, matchedBehavior) => merge(
+            return reduce((interimState, matchedBehavior) => ({
-                interimState,
+              ...interimState,
-                behaviors[matchedBehavior.type].reducer(
+              ...behaviors[matchedBehavior.type].reducer(
                 interimState,
                 behaviors[matchedBehavior.type].validate
                   ? validateShape(objectStructure, matchedBehavior.payload)
                   : matchedBehavior.payload,
                 initialState
               )
-            ), state)(matchedBehaviors);
+            }), state)(matchedBehaviors);
         }
 
         return state;

src/validatePayload.js

@@ -45,6 +45,7 @@ export function validateShape(objectStructure: any, value: mixed): Object {
         }
 
         const validatedValue = getTypeValidation(valueType().type)(valueType, value);
+
         if (validatedValue === undefined) {
             console.warn(`The property, ${name}, was populated with a type ${ typeof value } which does not` +
                 ` match that specified in the reducer configuration ${ wildcardKeyPresent ? ', nor did it match a wildcardKey': ''}. It has been stripped from` +