public function testFilter() {
$asset = new FileAsset(__DIR__ . '/fixtures/home.jpg');
$asset
->load();
$before = $asset
->getContent();
$this->filter
->filterDump($asset);
$this
->assertNotEmpty($asset
->getContent(), '->filterLoad() sets content');
$this
->assertNotEquals($before, $asset
->getContent(), '->filterDump() changes the content');
$this
->assertMimeType('image/jpeg', $asset
->getContent(), '->filterDump() creates JPEG data');
}