public function testTryMention()
{
// Username
$user = new User(['id' => 1, 'first_name' => 'John', 'last_name' => 'Taylor', 'username' => 'jtaylor']);
self::assertEquals('@jtaylor', $user->tryMention());
// First name.
$user = new User(['id' => 1, 'first_name' => 'John']);
self::assertEquals('John', $user->tryMention());
// First and Last name.
$user = new User(['id' => 1, 'first_name' => 'John', 'last_name' => 'Taylor']);
self::assertEquals('John Taylor', $user->tryMention());
}