test(unit): add fixes for newer jest

test/unit/components/compose-comment.test.jsx

@@ -177,6 +177,7 @@ describe('Compose Comment test', () => {
 
     test('Comment Status initialized properly when muted', () => {
         jest.useFakeTimers();
+        jest.spyOn(global, 'setTimeout');
         const realDateNow = Date.now.bind(global.Date);
         global.Date.now = () => 0;
         const mutedStore = mockStore({

test/unit/components/navigation.test.jsx

@@ -12,6 +12,8 @@ describe('Navigation', () => {
     beforeEach(() => {
         store = null;
         jest.useFakeTimers();
+        jest.spyOn(global, 'setTimeout');
+        jest.spyOn(global, 'clearTimeout');
     });
 
     const getNavigationWrapper = props => {

test/unit/redux/navigation.test.js

@@ -13,9 +13,16 @@ const {
 
 
 describe('unit test lib/validate.js', () => {
+    const realLocation = global.window.location;
+
     beforeEach(() => {
         // mock window navigation
-        global.window.location.assign = jest.fn();
+        // see https://stackoverflow.com/q/46169824
+        delete global.window.location;
+        global.window.location = {
+            ...realLocation,
+            assign: jest.fn()
+        };
     });
 
     test('initialState', () => {