public function test_can_create_category()
 {
     $result = $this->repository->create(['name' => 'Category 4', 'description' => 'Description 4']);
     $this->assertInstanceOf(Category::class, $result);
     $this->assertEquals('Category 4', $result->name);
     $this->assertEquals('Description 4', $result->description);
     $result = Category::find(4);
     $this->assertEquals('Category 4', $result->name);
     $this->assertEquals('Description 4', $result->description);
 }