public function testExecute()
{
$statement = new Statement();
$persister = new TestPersister(new TestVisitor('test'));
$persister->results = 'results';
$query = new Query($statement, $persister);
$results = $query->execute();
$this->assertEquals('results', $results);
$query = new Query($statement);
try {
$query->execute();
$this->fail('Expect exception is occured.');
} catch (\RuntimeException $ex) {
$this->assertTrue(true);
}
}
