how to use test object array contain element which match giving object?

 when we write a test case to verify that an object array contains specific object within JEST framework

we can use the following code to handle it .

let posts=[]

beforeAll(()=>{

    posts.push({title:'test', user:'dan'})

    posts.push({title:'hello world', user:'dan'})

})

test('test post exists',()=>{

    expect(posts).toEqual(

        expect.arrayContaining([

            expect.objectContaining({title: 'test'})

        ])

    )

})