/**
* The first message is always added when the object is created, all other
* message are added via add interface. This error implements both
* Coutable and Iterator interfaces meaning the following methods are
* available: count, key, current, next, rewind, valid.
*
* @return null
*/
public function testMessages()
{
$this->assertEquals(1, $this->error->count());
$msg2 = 'second error message';
$msg3 = 'third error message';
$msg4 = 'fourth error message';
$this->assertSame($this->error, $this->error->add($msg2));
$this->assertEquals(2, $this->error->count());
$this->assertSame($this->error, $this->error->add($msg3));
$this->assertEquals(3, $this->error->count());
$this->assertSame($this->error, $this->error->add($msg4));
$this->assertEquals(4, $this->error->count());
$this->assertTrue($this->error->valid());
$this->assertEquals(0, $this->error->key());
$this->assertEquals($this->firstMsg, $this->error->current());
/* go to next message */
$this->assertNull($this->error->next());
$this->assertTrue($this->error->valid());
$this->assertEquals(1, $this->error->key());
$this->assertEquals($msg2, $this->error->current());
/* go to next message */
$this->assertNull($this->error->next());
$this->assertTrue($this->error->valid());
$this->assertEquals(2, $this->error->key());
$this->assertEquals($msg3, $this->error->current());
/* go to next message */
$this->assertNull($this->error->next());
$this->assertTrue($this->error->valid());
$this->assertEquals(3, $this->error->key());
$this->assertEquals($msg4, $this->error->current());
/* try to go past the end */
$this->assertNull($this->error->next());
$this->assertFalse($this->error->valid());
$this->assertNull($this->error->key());
$this->assertFalse($this->error->current());
/* go back to the first element */
$this->assertNull($this->error->rewind());
$this->assertTrue($this->error->valid());
$this->assertEquals(0, $this->error->key());
$this->assertEquals($this->firstMsg, $this->error->current());
}
