public function testHasAttachments()
{
$stNoAttachments = new Statement();
$this->assertFalse($stNoAttachments->hasAttachments());
$stWithAttachments = new Statement(['attachments' => [['usageType' => 'http://test', 'display' => ['en-US' => 'test display'], 'contentType' => 'text/plain; charset=ascii', 'length' => 0, 'sha2' => hash('sha256', json_encode(['foo', 'bar']))]]]);
$this->assertTrue($stWithAttachments->hasAttachments());
}
