text: test('null', () => {
    const n = null;
  
    expect(n).toBeDefined();
    expect(n).toBeNull();
    expect(n).not.toBeUndefined();
    expect(n).not.toBeTruthy();
    expect(n).toBeFalsy();
  });
  
  const shoppingList = [
    'milk',
    'apples',
  ];
  
  test('The shopping list must contain milk otherwise women angry', () => {
    expect(shoppingList).toContain('milk');
  });
  
  test('Check if auw is present in the name of the person', () => {
    expect('Philippe De Pauw').toMatch(/auw/);
  });