[Tests] Update some existing tests

Author: lindyhopchris

Diff for: tests/dummy/app/JsonApi/V1/Posts/PostResource.php

@@ -34,6 +34,7 @@ public function attributes(): iterable
         return [
             'content' => $this->content,
             'createdAt' => $this->created_at,
+            'publishedAt' => $this->published_at,
             'slug' => $this->slug,
             'synopsis' => $this->synopsis,
             'title' => $this->title,

Diff for: tests/dummy/app/JsonApi/V1/Posts/PostSchema.php

@@ -53,6 +53,7 @@ public function fields(): array
             HasMany::make('comments')->readOnly(),
             Str::make('content'),
             DateTime::make('createdAt')->sortable()->readOnly(),
+            DateTime::make('publishedAt')->sortable(),
             Str::make('slug'),
             Str::make('synopsis'),
             BelongsToMany::make('tags'),

Diff for: tests/dummy/app/Models/Post.php

@@ -40,6 +40,13 @@ class Post extends Model
         'title',
     ];
 
+    /**
+     * @var string[]
+     */
+    protected $casts = [
+        'published_at' => 'datetime',
+    ];
+
     /**
      * @return BelongsTo
      */

Diff for: tests/dummy/tests/Api/V1/Posts/ReadTagsTest.php

@@ -42,11 +42,12 @@ protected function setUp(): void
 
     public function test(): void
     {
-        $expected = Tag::factory()
-            ->count(3)
-            ->create();
+        $tags = Tag::factory()->count(3)->create();
+        $this->post->tags()->attach($tags);
 
-        $this->post->tags()->attach($expected);
+        $expected = $tags
+            ->map(fn(Tag $tag) => $this->serializer->tag($tag)->jsonSerialize())
+            ->all();
 
         $response = $this
             ->jsonApi('tags')

Diff for: tests/dummy/tests/Api/V1/Serializer.php

@@ -20,6 +20,7 @@
 namespace App\Tests\Api\V1;
 
 use App\Models\Post;
+use App\Models\Tag;
 use App\Models\User;
 use LaravelJsonApi\Core\Document\ResourceObject;
 use function url;
@@ -42,11 +43,12 @@ public function post(Post $post): ResourceObject
             'id' => (string) $post->getRouteKey(),
             'attributes' => [
                 'content' => $post->content,
-                'createdAt' => $post->created_at->toJSON(),
+                'createdAt' => $post->created_at->jsonSerialize(),
+                'publishedAt' => optional($post->published_at)->jsonSerialize(),
                 'slug' => $post->slug,
                 'synopsis' => $post->synopsis,
                 'title' => $post->title,
-                'updatedAt' => $post->updated_at->toJSON(),
+                'updatedAt' => $post->updated_at->jsonSerialize(),
             ],
             'relationships' => [
                 'author' => [
@@ -74,6 +76,41 @@ public function post(Post $post): ResourceObject
         ]);
     }
 
+    /**
+     * Get the expected tag resource.
+     *
+     * @param Tag $tag
+     * @return ResourceObject
+     */
+    public function tag(Tag $tag): ResourceObject
+    {
+        $self = url('/api/v1/tags', $tag);
+
+        return ResourceObject::fromArray([
+            'type' => 'tags',
+            'id' => (string) $tag->getRouteKey(),
+            'attributes' => [
+                'createdAt' => $tag->created_at->jsonSerialize(),
+                'name' => $tag->name,
+                'updatedAt' => $tag->updated_at->jsonSerialize(),
+            ],
+            'relationships' => [
+                'posts' => [
+                    'links' => [
+                        'self' => "{$self}/relationships/posts",
+                        'related' => "{$self}/posts",
+                    ],
+                ],
+                'videos' => [
+                    'links' => [
+                        'self' => "{$self}/relationships/videos",
+                        'related' => "{$self}/videos",
+                    ],
+                ],
+            ],
+        ]);
+    }
+
     /**
      * Get the expected user resource.
      *
@@ -88,9 +125,9 @@ public function user(User $user): ResourceObject
             'type' => 'users',
             'id' => (string) $user->getRouteKey(),
             'attributes' => [
-                'createdAt' => $user->created_at->toJSON(),
+                'createdAt' => $user->created_at->jsonSerialize(),
                 'name' => $user->name,
-                'updatedAt' => $user->updated_at->toJSON(),
+                'updatedAt' => $user->updated_at->jsonSerialize(),
             ],
             'links' => [
                 'self' => $self,