Added test for morphToMany relationship

tests/Feature/InteractsWithDatabase.php

@@ -20,9 +20,11 @@ protected function setupDatabase()
         include_once __DIR__ . '/database/create_posts_table.php';
         include_once __DIR__ . '/database/create_comments_table.php';
         include_once __DIR__ . '/database/create_comment_post_table.php';
+        include_once __DIR__ . '/database/create_commentables_table.php';
 
         (new \CreatePostsTable)->up();
         (new \CreateCommentsTable)->up();
         (new \CreateCommentPostTable)->up();
+        (new \CreateCommentablesTable)->up();
     }
 }

tests/Feature/SelectRelationTest.php

@@ -27,6 +27,16 @@ public function comments()
     }
 }
 
+class PostMorphToMany extends Model
+{
+    protected $table = 'posts';
+
+    public function comments()
+    {
+        return $this->morphToMany(Comment::class, 'commentable');
+    }
+}
+
 class Comment extends Model
 {
 }
@@ -96,4 +106,34 @@ public function it_handles_morph_many_relationships()
         // make sure we cache the result for each option element
         $this->assertCount(1, DB::getQueryLog());
     }
+
+    /** @test */
+    public function it_handles_morph_to_many_relationships()
+    {
+        $this->setupDatabase();
+
+        $post = PostMorphToMany::create(['content' => 'Content']);
+
+        $commentA = $post->comments()->create(['content' => 'Content A']);
+        $commentB = Comment::create(['content' => 'Content B']);
+        $commentC = $post->comments()->create(['content' => 'Content C']);
+
+        $options = Comment::get()->pluck('content', 'id');
+
+        Route::get('select-relation', function () use ($post, $options) {
+            return view('select-relation')
+                ->with('post', $post)
+                ->with('options', $options);
+        })->middleware('web');
+
+        DB::enableQueryLog();
+
+        $this->visit('/select-relation')
+            ->seeElement('option[value="' . $commentA->getKey() . '"]:selected')
+            ->seeElement('option[value="' . $commentB->getKey() . '"]:not(:selected)')
+            ->seeElement('option[value="' . $commentC->getKey() . '"]:selected');
+
+        // make sure we cache the result for each option element
+        $this->assertCount(1, DB::getQueryLog());
+    }
 }

tests/Feature/database/create_commentables_table.php

@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateCommentablesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('commentables', function (Blueprint $table) {
+            $table->bigIncrements('id');
+            $table->unsignedBigInteger('comment_id');
+            $table->morphs('commentable');
+        });
+    }
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('comments');
+    }
+}