test(unit): mock date in transaction-item test

__tests__/components/__snapshots__/transaction-item.test.js.snap

@@ -29,7 +29,7 @@ exports[`<TransactionItem /> should render a transaction item correctly 1`] = `
           <p
             class="sc-kgoBCf goviHQ sc-htpNat pRhzD"
           >
-            23:20 PM
+            17:01 PM
           </p>
         </div>
       </div>

__tests__/components/transaction-item.test.js

@@ -8,7 +8,21 @@ import 'jest-dom/extend-expect';
 import { TransactionItemComponent } from '../../app/components/transaction-item';
 import { appTheme } from '../../app/theme';
 
-afterEach(cleanup);
+let originalDate;
+
+beforeEach(() => {
+  originalDate = global.Date;
+  global.Date = class extends Date {
+    constructor() {
+      super();
+      return '2019-03-05T19:58:35.457Z';
+    }
+  };
+});
+afterEach(() => {
+  global.Date = originalDate;
+  cleanup();
+});
 
 describe('<TransactionItem />', () => {
   test('should render a transaction item correctly', () => {
@@ -19,7 +33,7 @@ describe('<TransactionItem />', () => {
           address='123456789123456789123456789123456789'
           transactionId='a0s9dujo23j0'
           amount={0.8652}
-          date={new Date(Date.UTC(2018, 10, 20, 1, 20, 35)).toString()}
+          date={new Date().toString()}
           zecPrice={2.94}
           fees={0.0001}
         />