text: import * as handler from '../src/functions/handler';
  
  test('hello', async () => {
      const event = 'null';
      const context = 'context';
      const functionRes = await handler.hello( event, context );
  
      expect( functionRes.httpResponseCode ).toEqual( 200 );
      expect( typeof( functionRes.body ) ).toEqual( 'string' );
  });
  
  test('hello-fail', async () => {
      const event = null;
      const context = 's';
      const functionRes = await handler.hello( event, context );
  
      expect( functionRes.httpResponseCode ).toEqual( 400 );
  })