function test_select_uses_from()
{
$dt = new DataTable("http://example.org/store");
$dt->map('http://example.org/name', 'name');
$dt->map('http://example.org/Person', 'person');
$dt->select('name');
$dt->from('person');
$this->assertEquals("select ?_uri ?name where {?_uri <http://example.org/name> ?name; a <http://example.org/Person>. }", $dt->get_sparql());
}
