function traverse_array($array, $depth)
{
$prefix = !$depth ? '' : str_repeat(" ", $depth);
$counter = 0;
foreach ($array as $key => $value) {
echo $prefix . ++$counter . ". " . $key . "\n";
if (is_array($value) && count($value)) {
traverse_array($value, $depth + 1);
}
}
}
/**
* @covers ::traverse_array
* @dataProvider provideNonLists
* @expectedException InvalidArgumentException
*/
public function test_throws_InvalidArgumentException_when_list_is_not_an_array_or_Traversable($list)
{
// ----------------------------------------------------------------
// setup your test
// this will hold the list built by our callable
$actualList = [];
// the test uses a valid callable just to make sure this
// is not triggering any exceptions of any kind
$callable = function ($value, $key, $name) use(&$actualList) {
$actualList[$name] = $value;
};
// ----------------------------------------------------------------
// perform the change
traverse_array($list, '$list', $callable);
// ----------------------------------------------------------------
// test the results
}
