lumen test method and store method.php

<?php
//test method
    public function test_store_should_save_new_books_in_database()
    {
        $this->post('/books',[
            'title'=>'A story of rush',
            'description'=>'A story of rush is a book of imagination. There\'s no existence of the book in real world!',
            'author'=>'H.G XYZ',
            'isbn'=>'16372916273',
            'created_at'=>time(),
            'updated_at'=>time()
         ]);

        $this
            ->seeStatusCode(201)
            ->seeJson(['created'=>true])
            ->seeInDatabase('books',['title'=>'A story of rush']);

    }

//Controller method

public function store(Request $request)
    {
        try{
            $book = Book::create($request->all());
        }catch(\Exception $e){
            var_dump(($e->getMessage()));
        }
        return response()->json(['created'=>true],201);
    }