public function testFind()
 {
     // Easter
     $this->assertEquals('Easter', $this->repo->find('Easter')->name());
     $easter = new Yearwheel('Easter');
     $this->assertTrue($easter->equals($this->repo->find('Easter')));
     // Christmas
     $this->assertEquals('Christmas', $this->repo->find('Christmas')->name());
     // Summer
     $this->assertEquals('Summer', $this->repo->find('Summer')->name());
     // Winter
     $this->assertEquals('Winter', $this->repo->find('Winter')->name());
     $this->assertEquals(new Yearwheel('Winter'), $this->repo->find('Winter'));
 }