Toast testkit driver (#2901)

* Added toast driver

* Added toast sanity checks

* Added usage of jest fake timers

Author: nitzanyiz

src/incubator/toast/Toast.driver.new.ts

@@ -0,0 +1,21 @@
+import {ToastProps} from '../index';
+import {useComponentDriver, ComponentProps} from '../../testkit/new/Component.driver';
+import {TextDriver} from '../../components/text/Text.driver.new';
+import {ButtonDriver} from '../../components/button/Button.driver.new';
+
+export const ToastDriver = (props: ComponentProps) => {
+  const {renderTree, testID} = props;
+  const driver = useComponentDriver<ToastProps>(props);
+  const actionButtonDriver = ButtonDriver({renderTree, testID: `${testID}-action`});
+  const messageDriver = TextDriver({renderTree, testID: `${testID}-message`});
+
+  const getMessage = () => {
+    return messageDriver;
+  };
+
+  const getAction = () => {
+    return actionButtonDriver;
+  };
+
+  return {...driver, getMessage, getAction};
+};

src/incubator/toast/__test__/index.spec.tsx

@@ -0,0 +1,48 @@
+import React from 'react';
+import {render} from '@testing-library/react-native';
+import Toast, {ToastProps} from '../index';
+import {ToastDriver} from '../Toast.driver.new';
+
+const testID = 'toast';
+
+const TestCase = (props: ToastProps) => {
+  return <Toast visible testID={testID} {...props}/>;
+};
+
+const getDriver = (props?: ToastProps) => {
+  const renderTree = render(<TestCase {...props}/>);
+  const toastDriver = ToastDriver({renderTree, testID});
+  return {render, toastDriver};
+};
+
+describe('Sanity checks', () => {
+  it('Should show toast', () => {
+    const {toastDriver} = getDriver();
+    expect(toastDriver.exists()).toBeTruthy();
+  });
+  
+  it('Should dismiss after one second', async () => {
+    jest.useFakeTimers();
+    const TIME = 1000;
+    const dismissFn = jest.fn();
+    const {toastDriver} = getDriver({autoDismiss: TIME, onDismiss: dismissFn});
+    expect(toastDriver.exists()).toBeTruthy();
+    expect(dismissFn).not.toHaveBeenCalled();
+    jest.advanceTimersByTime(TIME);
+    expect(dismissFn).toHaveBeenCalledTimes(1);
+  });
+
+  it('Should show an Hello World message', () => {
+    const MESSAGE = 'Hello World';
+    const {toastDriver} = getDriver({message: MESSAGE});
+    expect(toastDriver.getMessage().getText()).toEqual(MESSAGE);
+  });
+
+  it('Should press on action button', () => {
+    const actionFn = jest.fn();
+    const {toastDriver} = getDriver({action: {onPress: actionFn}});
+    expect(actionFn).not.toHaveBeenCalled();
+    toastDriver.getAction().press();
+    expect(actionFn).toHaveBeenCalled();
+  });
+});