incr/tests/Feature/TrackerTest.php

<?php

declare(strict_types=1);

namespace Tests\Feature;

use App\Livewire\Counter;
use App\Models\Tracker;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Livewire\Livewire;
use Tests\TestCase;

class TrackerTest extends TestCase
{
    use RefreshDatabase;

    public function test_a_fresh_install_asks_for_a_starting_value(): void
    {
        Livewire::test(Counter::class)
            ->assertSet('needsOnboarding', true)
            ->assertSee('Starting Value');
    }

    public function test_initialise_creates_the_counter(): void
    {
        Livewire::test(Counter::class)
            ->set('value', 47)
            ->call('initialise')
            ->assertSet('needsOnboarding', false)
            ->assertSet('count', 47);

        $tracker = Tracker::first();

        $this->assertNotNull($tracker);
        $this->assertSame(47, $tracker->count);
        $this->assertSame('Counter', $tracker->label);
    }

    public function test_a_counter_can_start_at_zero(): void
    {
        Livewire::test(Counter::class)
            ->set('value', 0)
            ->call('initialise')
            ->assertSet('needsOnboarding', false)
            ->assertSet('count', 0);

        $this->assertSame(0, Tracker::first()->count);
    }

    public function test_a_zero_count_does_not_reopen_onboarding(): void
    {
        Tracker::factory()->create(['count' => 0]);

        Livewire::test(Counter::class)
            ->assertSet('needsOnboarding', false);
    }

    public function test_initialise_rejects_a_negative_starting_value(): void
    {
        Livewire::test(Counter::class)
            ->set('value', -5)
            ->call('initialise')
            ->assertHasErrors('value')
            ->assertSet('needsOnboarding', true);

        $this->assertSame(0, Tracker::count());
    }

    public function test_an_existing_counter_skips_onboarding(): void
    {
        Tracker::factory()->create(['count' => 9]);

        Livewire::test(Counter::class)
            ->assertSet('needsOnboarding', false)
            ->assertSet('count', 9);
    }

    public function test_initialising_twice_does_not_create_a_second_counter(): void
    {
        $component = Livewire::test(Counter::class)->set('value', 5);

        Tracker::factory()->create(['count' => 12]);

        $component->call('initialise')->assertSet('count', 12);

        $this->assertSame(1, Tracker::count());
    }
}