/**
* @testdox An item can have a single file attached.
* @test
*/
public function files()
{
$item = new Item(null, $this->testUser);
// First version.
$item->save([], null, null, 'Test file contents.');
$this->assertSame(1, $item->getId());
$this->assertSame('c4/ca/1/v1', $item->getFilePath());
$this->assertFileExists(__DIR__ . '/data/storage/c4/ca/1/v1');
$this->assertSame('Test file contents.', $item->getFileContents());
$this->assertSame(1, $item->getVersionCount());
// Second version.
$item->save(['id' => 1], null, null, 'New file contents.');
$this->assertSame(1, $item->getId());
$this->assertSame(2, $item->getVersionCount());
$this->assertSame('c4/ca/1/v2', $item->getFilePath());
$this->assertFileExists(__DIR__ . '/data/storage/c4/ca/1/v1');
$this->assertFileExists(__DIR__ . '/data/storage/c4/ca/1/v2');
$this->assertSame('New file contents.', $item->getFileContents());
$this->assertSame('Test file contents.', $item->getFileContents(1));
// Upload a different file.
$item2 = new Item(null, $this->testUser);
$item2->save(['title' => 'Second test'], null, null, 'Second test.');
$this->assertSame(2, $item2->getId());
$this->assertSame('c8/1e/2/v1', $item2->getFilePath());
$this->assertTrue($item2->isText());
}