public function testDataTableCustomProperties()
{
$data = new DataTable('first', ValueType::STRING);
$data->setCustomProperty('a', 'foo');
$properties = $data->getCustomProperties();
$this->assertTrue(is_array($properties), "properties must be an array");
$this->assertArrayHasKey('a', $properties, "properties[a] must exist");
$this->assertSame('foo', $data->getCustomProperty('a'), "getCustomProperty must return expected value");
}
