Books API endpoint test file

BooksEndpointTest.php

<?php

use App\Models\Book;

const API_ENDPOINT = '/api/books';

uses()->group('books'); // Assign 'books' group to all tests (whole file)

beforeEach(function () {
    $this->mockBooksCollection = Book::factory(5)->create(); // Generate mock database entries for testing
});

test('get books', function () {
    $response = $this->get(API_ENDPOINT);

    expect($response->getStatusCode())
        ->toBe(200)
        ->and($response->getContent())->json()
        ->toHaveCount($this->mockBooksCollection->count());
});

test('get books by filter', function () {
    $this->mockBooksCollection = $this->mockBooksCollection->merge(
        Book::factory($mockCount = 2)->create([$mockFilter = 'author' => $mockAuthor = 'John Doe'])
    );

    $response = $this->get(sprintf('%s?%s=%s', API_ENDPOINT, $mockFilter, $mockAuthor));

    expect($response->getStatusCode())
        ->toBe(200)
        ->and($response->getContent())->json()
        ->toHaveCount($mockCount)
        ->each(function ($book) use ($mockAuthor) {
            $book->author->toBe($mockAuthor);
        });
});

test('get book by ISBN', function () {
    $this->mockBooksCollection = $this->mockBooksCollection->add(
        Book::factory()->create(['isbn' => $mockIsbn = '1234567890'])
    );

    $response = $this->get(sprintf('%s/%s', API_ENDPOINT, $mockIsbn));

    expect($response->getStatusCode())
        ->toBe(200)
        ->and($response->getContent())->json()->isbn
        ->toBe($mockIsbn);
});


test('invalid route', function () {

    $response = $this->get(sprintf('%s/%s', API_ENDPOINT, 'test'));

    expect($response->getStatusCode())
        ->toBe(404);
});