tests: add test for models Plugin, Playlist, PlaylistItem

tests/Unit/Models/PlaylistTest.php

@@ -0,0 +1,46 @@
+<?php
+
+use App\Models\Device;
+use App\Models\Playlist;
+use App\Models\PlaylistItem;
+
+test('playlist has required attributes', function () {
+    $playlist = Playlist::factory()->create([
+        'name' => 'Test Playlist',
+        'is_active' => true,
+        'weekdays' => [1, 2, 3],
+        'active_from' => '09:00',
+        'active_until' => '17:00',
+    ]);
+
+    expect($playlist)
+        ->name->toBe('Test Playlist')
+        ->is_active->toBeTrue()
+        ->weekdays->toBe([1, 2, 3])
+        ->active_from->format('H:i')->toBe('09:00')
+        ->active_until->format('H:i')->toBe('17:00');
+});
+
+test('playlist belongs to device', function () {
+    $device = Device::factory()->create();
+    $playlist = Playlist::factory()->create(['device_id' => $device->id]);
+
+    expect($playlist->device)
+        ->toBeInstanceOf(Device::class)
+        ->id->toBe($device->id);
+});
+
+test('playlist has many items', function () {
+    $playlist = Playlist::factory()->create();
+    $items = PlaylistItem::factory()->count(3)->create(['playlist_id' => $playlist->id]);
+
+    expect($playlist->items)
+        ->toHaveCount(3)
+        ->each->toBeInstanceOf(PlaylistItem::class);
+});
+
+test('getNextPlaylistItem returns null when playlist is inactive', function () {
+    $playlist = Playlist::factory()->create(['is_active' => false]);
+
+    expect($playlist->getNextPlaylistItem())->toBeNull();
+});