public function testThatKeysCanBeKeptInArray()
{
$items = [["a" => "b", "c" => "d"], ["a" => "c", "c" => "e", "d" => "e"], null];
//Default action (delete)
$kept_keys = CollectionUtility::keepKeys($items, ["a", "c"]);
$this->assertEquals([["a" => "b", "c" => "d"], ["a" => "c", "c" => "e"], []], $kept_keys);
//Explicit action (delete)
$kept_keys = CollectionUtility::keepKeys($items, ["a", "c"], CollectionUtility::REMOVAL_ACTION_DELETE);
$this->assertEquals([["a" => "b", "c" => "d"], ["a" => "c", "c" => "e"], []], $kept_keys);
//Nullify action
$kept_keys = CollectionUtility::keepKeys($items, ["a", "c"], CollectionUtility::REMOVAL_ACTION_NULLIFY);
$this->assertEquals([["a" => "b", "c" => "d"], ["a" => "c", "c" => "e", "d" => null], []], $kept_keys);
//Invalid actions
try {
CollectionUtility::keepKeys($items, ["a", "c"], "invalid");
$this->fail("Expected invalid argument exception");
} catch (\InvalidArgumentException $e) {
}
}
public function testThatKeysCanBeKeptInMultiDimArray()
{
$items = [["a" => "b", "c" => "d"], ["a" => "c", "c" => "e", "d" => "e"], null];
$kept_keys = CollectionUtility::keepKeys($items, ["a", "c"]);
$this->assertEquals([["a" => "b", "c" => "d"], ["a" => "c", "c" => "e"], []], $kept_keys);
}
