Test previewing email template

app/Http/Controllers/PostPublishController.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Mail\PostPublished;
+use App\Models\Post;
+
+class PostPublishController extends Controller
+{
+    public function previewMailTemplate(int $id)
+    {
+        $post = Post::find($id);
+
+        return (new PostPublished($post))->render();
+    }
+}

app/Mail/PostPublished.php

@@ -2,6 +2,7 @@
 
 namespace App\Mail;
 
+use App\Models\Post;
 use Illuminate\Bus\Queueable;
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Mail\Mailable;
@@ -13,14 +14,16 @@ class PostPublished extends Mailable
 {
     use Queueable, SerializesModels;
 
+    public Post $post;
+
     /**
      * Create a new message instance.
      *
      * @return void
      */
-    public function __construct()
+    public function __construct(Post $post)
     {
-        //
+        $this->post = $post;
     }
 
     /**
@@ -44,6 +47,9 @@ public function content()
     {
         return new Content(
             markdown: 'emails.posts.published',
+            with: [
+                'url' => url("/posts/{$this->post->id}"),
+            ],
         );
     }
 

resources/views/emails/posts/published.blade.php

@@ -1,10 +1,10 @@
 <x-mail::message>
-# Introduction
+# Post Published
 
-The body of your message.
+Your post has been published on Medium
 
-<x-mail::button :url="''">
-Button Text
+<x-mail::button :url="$url">
+View Post
 </x-mail::button>
 
 Thanks,<br>

routes/web.php

@@ -3,6 +3,7 @@
 use App\Http\Controllers\HomeController;
 use App\Http\Controllers\MediaUploaderController;
 use App\Http\Controllers\PostController;
+use App\Http\Controllers\PostPublishController;
 use Illuminate\Support\Facades\Route;
 
 /*
@@ -56,4 +57,9 @@
 
         Route::get('/upload/download/{filename}', 'download')->name('upload.download');
     });
+
+    Route::prefix('mailable')->group(function() {
+        Route::get('template/{id}', [PostPublishController::class, 'previewMailTemplate'])
+            ->name('mailable.preview');
+    });
 });

tests/Feature/MailTest.php

@@ -4,20 +4,39 @@
 
 use App\Mail\OrderShipped;
 use App\Mail\PostPublished;
+use App\Models\Post;
+use App\Models\User;
 use Illuminate\Contracts\Mail\Mailable;
 use Illuminate\Foundation\Testing\RefreshDatabase;
 use Illuminate\Foundation\Testing\WithFaker;
 use Tests\TestCase;
 
 class MailTest extends TestCase
 {
+    use RefreshDatabase;
+
     /** @test */
     public function mailables_are_available()
     {
-        $postPublished = new PostPublished();
+        $this->actingAs($user = User::factory()->create());
+
+        $post = Post::factory()->create(['user_id' => $user->id]);
+
+        $postPublished = new PostPublished($post);
         $orderShipped = new OrderShipped();
 
         $this->assertInstanceOf(Mailable::class, $postPublished);
         $this->assertInstanceOf(Mailable::class, $orderShipped);
     }
+
+    /** @test */
+    public function mailable_can_be_previewed()
+    {
+        $this->actingAs($user = User::factory()->create());
+
+        $post = Post::factory()->create(['user_id' => $user->id]);
+
+        $this->get(route('mailable.preview', $post->id))
+            ->assertStatus(200);
+    }
 }