function test_get_differences()
{
$s = 'http://example.com/subj';
$result = new DataTableResult($this->_select_result_without_uri_pseudo_variable_multiple_rows, $s);
$dt = new DataTable("http://example.org/store");
$dt->map('http://example.org/title', 'title');
$dt->set('title', 'baz');
$diffs = $dt->get_differences($result);
$this->assertEquals(1, count($diffs));
$this->assertTrue(array_key_exists($s, $diffs));
$this->assertEquals(1, count($diffs[$s]['removals']));
$this->assertTrue(array_key_exists('http://example.org/title', $diffs[$s]['removals']));
$this->assertEquals(2, count($diffs[$s]['removals']['http://example.org/title']));
$this->assertEquals(1, count($diffs[$s]['additions']));
$this->assertTrue(array_key_exists('http://example.org/title', $diffs[$s]['additions']));
$this->assertEquals(1, count($diffs[$s]['additions']['http://example.org/title']));
}
