public static function testList()
{
$linkedList = new LinkedList();
if ($linkedList->getCount() !== 0) {
self::printError("problem creating a new list - count not 0");
}
// test insertFront
$linkedList->insertFront('insertFront');
if ($linkedList->getCount() !== 1) {
self::printError("problem adding first element to front - count not 1");
}
// ad a second item to the front
$linkedList->insertFront('insertFrontAgain');
if ($linkedList->getCount() !== 2) {
self::printError("problem adding second element to front - count not 2");
}
// test getAt
if ($linkedList->getAt(0) !== 'insertFrontAgain') {
self::printError("problem with getAt: not finding first node");
}
// test getAt
if ($linkedList->getAt(12) !== null) {
self::printError("problem with getAt: accessing nonexisting node should have returned null");
}
// test insertEnd
$linkedList->insertEnd('insertEnd');
if ($linkedList->getAt(2) !== 'insertEnd' || $linkedList->getCount() !== 3) {
self::printError("problem with insertEnd: inserted item not found");
}
// test insertAt
$linkedList->insertAt('insertedAt2', 2);
if ($linkedList->getAt(2) !== 'insertedAt2' || $linkedList->getAt(3) !== 'insertEnd') {
self::printError("problem with insertAt: inserted value not found at proper key");
}
$linkedList->insertAt('insertedAt3', 3);
if ($linkedList->getAt(3) !== 'insertedAt3') {
self::printError("problem with insertAt: inserted value not found at proper key");
}
// test deleteAt
$linkedList->deleteAt(3);
if ($linkedList->getAt(3) === 'insertedAt3') {
self::printError("problem with deleteAt: deleted node still present");
}
// test deleting by value
$linkedList->delete('insertedAt2');
// test reverse
$linkedList->reverse('recursive');
if ($linkedList->getAt(0) !== 'insertEnd') {
self::printError("problem with reverse");
}
$linkedList->reverse();
// display... for now
// $linkedList->debug();
$linkedList->printList('reverse');
// test empty
$linkedList->emptyList();
if ($linkedList->getCount() !== 0) {
self::printError("problem with emptyList: list count not zero");
}
}
}
}
$LL = new LinkedList();
$LL->insert("Akeda");
$LL->insert("Dwi");
$LL->insert("Stevey");
$LL->insert("Paul");
// Function to test given keyword.
function test_searching($keyword = '')
{
global $LL;
if ($LL->search($keyword) !== NULL) {
echo "Node with value '{$keyword}' is found\n";
echo "The previous node of '{$keyword}' is : " . $LL->getPrev() . "\n";
echo "The next node of '{$keyword}' is : " . $LL->getNext() . "\n";
} else {
echo "Node with value '{$keyword}' is NOT found\n";
}
echo "\n";
}
// Test searching of node in linked list
test_searching("Akeda");
test_searching("Someone else");
test_searching("Dwi");
test_searching("Paul");
// Delete Stevey
$LL->delete("Stevey");
// The next and prev references were updated after delete operation.
echo "After 'Stevey' is deleted: \n\n";
test_searching("Dwi");
test_searching("Paul");
/**
* @expectedException Exception
* @expectedExceptionMessageRegExp #Can't delete#
*/
public function testErrorDeletePositionNotExists()
{
$list = new LinkedList([1, 2, 3]);
$list->delete(100);
}