Testcase for store method

CustomerTest.php

<?php
namespace Tests\Feature;

use App\Mail\WelcomeNewCustomer;
use Illuminate\Support\Facades\Mail;
use Tests\TestCase;

class CustomerTest extends TestCase
{
    /**
     * A basic test example.
     *
     * @return void
     */
    public function test_example()
    {
        $email    = "chintance1993@gmail.com";
        $response = $this->post('api/customer/save', ['name' => 'CM', 'email' => $email]);

        Mail::fake();
        Mail::to($email)->send(new WelcomeNewCustomer(['user' => "CM"]));
        Mail::assertSent(WelcomeNewCustomer::class);

        $response->assertStatus(200);
    }
}