fix: fix lang local storage after logout

1. Retain the lang value in LocalStorage when logging out
2. Add clearLocalStorage func && add unit test

Change-Id: I84cf361bfcaa40d2a6d80f687d02f43665cef3d3

src/stores/root.js

@@ -17,7 +17,7 @@ import { RouterStore } from 'mobx-react-router';
 import { parse } from 'qs';
 import client from 'client';
 import { getQueryString } from 'utils/index';
-import { setLocalStorageItem } from 'utils/local-storage';
+import { setLocalStorageItem, clearLocalStorage } from 'utils/local-storage';
 import { isEmpty, values } from 'lodash';
 
 export class RootStore {
@@ -258,8 +258,8 @@ export class RootStore {
     stores.forEach((store) => {
       store.clearData();
     });
-    // clear keystone_token in the local storage
-    localStorage.clear();
+    // clear all local storage expect language
+    clearLocalStorage(['lang']);
   }
 }
 

src/utils/local-storage.js

@@ -44,3 +44,16 @@ export const setLocalStorageItem = (
     );
   } catch (e) {}
 };
+
+export const clearLocalStorage = (expectKeys = []) => {
+  if (!expectKeys.length) {
+    localStorage.clear();
+    return;
+  }
+  const keys = Object.keys(localStorage);
+  keys.forEach((key) => {
+    if (!expectKeys.includes(key)) {
+      localStorage.removeItem(key);
+    }
+  });
+};

src/utils/local-storage.spec.js

@@ -12,7 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { getLocalStorageItem, setLocalStorageItem } from './local-storage';
+import {
+  getLocalStorageItem,
+  setLocalStorageItem,
+  clearLocalStorage,
+} from './local-storage';
 
 describe('test localstorage', () => {
   it('getLocalStorageItem', () => {
@@ -41,4 +45,30 @@ describe('test localstorage', () => {
     expect(getLocalStorageItem('key')).toBe(null);
     localStorage.clear();
   });
+
+  it('clearLocalStorage - clear all', () => {
+    expect(getLocalStorageItem('key1')).toBe(null);
+    expect(getLocalStorageItem('key2')).toBe(null);
+    setLocalStorageItem('key1', 'value1');
+    setLocalStorageItem('key2', 'value2');
+    expect(getLocalStorageItem('key1')).toBe('value1');
+    expect(getLocalStorageItem('key2')).toBe('value2');
+    clearLocalStorage();
+    expect(getLocalStorageItem('key1')).toBe(null);
+    expect(getLocalStorageItem('key2')).toBe(null);
+    localStorage.clear();
+  });
+
+  it('clearLocalStorage - clear with expect', () => {
+    expect(getLocalStorageItem('key1')).toBe(null);
+    expect(getLocalStorageItem('key2')).toBe(null);
+    setLocalStorageItem('key1', 'value1');
+    setLocalStorageItem('key2', 'value2');
+    expect(getLocalStorageItem('key1')).toBe('value1');
+    expect(getLocalStorageItem('key2')).toBe('value2');
+    clearLocalStorage(['key1']);
+    expect(getLocalStorageItem('key1')).toBe('value1');
+    expect(getLocalStorageItem('key2')).toBe(null);
+    localStorage.clear();
+  });
 });