incr/tests/Feature/TrackerTest.php

<?php

declare(strict_types=1);

namespace Tests\Feature;

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

class TrackerTest extends TestCase
{
    use RefreshDatabase;

    public function test_show_reports_no_tracker_on_a_fresh_install(): void
    {
        $this->getJson('/tracker')
            ->assertOk()
            ->assertJson(['exists' => false]);
    }

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

        $this->getJson('/tracker')
            ->assertOk()
            ->assertJson([
                'exists' => true,
                'tracker' => ['count' => 9],
            ]);
    }

    public function test_a_tracker_can_be_created_without_a_label_or_unit(): void
    {
        $this->postJson('/tracker', [])->assertCreated();

        $tracker = Tracker::first();

        $this->assertSame('Counter', $tracker->label);
        $this->assertSame('units', $tracker->unit);
        $this->assertSame(0, $tracker->count);
    }

    public function test_a_new_counter_starts_at_zero(): void
    {
        $this->postJson('/tracker', []);

        $this->getJson('/tracker')
            ->assertOk()
            ->assertJson(['tracker' => ['count' => 0]]);
    }

    public function test_creating_a_second_tracker_conflicts(): void
    {
        $this->postJson('/tracker', [])->assertCreated();
        $this->postJson('/tracker', [])->assertStatus(409);

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

    public function test_label_and_unit_can_be_updated(): void
    {
        $tracker = Tracker::factory()->create(['count' => 4]);

        $this->patchJson('/tracker', ['label' => 'Books', 'unit' => 'books'])
            ->assertOk()
            ->assertJson(['label' => 'Books', 'unit' => 'books']);

        $tracker->refresh();

        $this->assertSame('Books', $tracker->label);
        $this->assertSame('books', $tracker->unit);
        $this->assertSame(4, $tracker->count, 'updating the label must not disturb the count');
    }

    public function test_update_returns_404_without_a_tracker(): void
    {
        $this->patchJson('/tracker', ['label' => 'Books'])->assertNotFound();
    }
}