public function testAuthor()
{
$p = new Post();
static::assertNull($p->getAuthor());
$u = new User();
static::assertCount(0, $u->getAuthoredPosts());
$p->setAuthor($u);
static::assertNotNull($p->getAuthor());
static::assertSame($u, $p->getAuthor());
static::assertCount(1, $u->getAuthoredPosts());
static::assertContains($p, $u->getAuthoredPosts());
}
