<?php
namespace Tests\Collections;
use Collections\LinkedQueue;
class LinkedQueueTest extends CollectionsTestCase
{
public function testPushOne()
{
$queue = new LinkedQueue();
$this->assertCount(0, $queue);
$this->assertTrue($queue->isEmpty());
$queue->enqueue(0);
$this->assertCount(1, $queue);
$this->assertFalse($queue->isEmpty());
}
/**
* @depends testPushOne
*/
public function testPeekOne()
{
$queue = new LinkedQueue();
$queue->enqueue(1);
$this->assertCount(1, $queue);
$this->assertFalse($queue->isEmpty());
$peek = $queue->first();
$this->assertCount(1, $queue);
$this->assertFalse($queue->isEmpty());
$this->assertEquals(1, $peek);
}
/**
* @depends testPeekOne
*/
public function testPopOne()
{
$queue = new LinkedQueue();
$queue->enqueue(1);
$this->assertCount(1, $queue);
$this->assertFalse($queue->isEmpty());
$pop = $queue->dequeue();
$this->assertCount(0, $queue);
$this->assertTrue($queue->isEmpty());
$this->assertEquals(1, $pop);
}
/**
* @depends testPopOne
*/
public function testMultiplePushPeekPop()
{
$queue = new LinkedQueue();
$queue->enqueue(1);
$queue->enqueue(3);
$queue->enqueue(5);
$peek = $queue->first();
$this->assertEquals(1, $peek);
$this->assertCount(3, $queue);
$this->assertFalse($queue->isEmpty());
$pop = $queue->dequeue();
$this->assertEquals(1, $pop);
$this->assertCount(2, $queue);
$this->assertFalse($queue->isEmpty());
$peek = $queue->first();
$this->assertEquals(3, $peek);
$this->assertCount(2, $queue);
$this->assertFalse($queue->isEmpty());
$pop = $queue->dequeue();
$this->assertEquals(3, $pop);
$this->assertCount(1, $queue);
$this->assertFalse($queue->isEmpty());
$peek = $queue->first();
$this->assertEquals(5, $peek);
$this->assertCount(1, $queue);
$this->assertFalse($queue->isEmpty());
$pop = $queue->dequeue();
$this->assertEquals(5, $pop);
$this->assertCount(0, $queue);
$this->assertTrue($queue->isEmpty());
}
/**
* @expectedException \Collections\Exception\EmptyException
*/
public function testPeekEmpty()
{
$queue = new LinkedQueue();
$queue->first();
}
/**
* @expectedException \Collections\Exception\EmptyException
*/
public function testPopEmpty()
{
$queue = new LinkedQueue();
$queue->dequeue();
}
public function testGetIteratorEmpty()
{
$queue = new LinkedQueue();
$iterator = $queue->getIterator();
$this->assertInstanceOf('Collections\\Iterator\\LinkedQueueIterator', $iterator);
}
/**
* @depends testMultiplePushPeekPop
*/
public function testIteratorForeach()
{
$queue = new LinkedQueue();
$queue->enqueue(1);
$queue->enqueue(2);
$queue->enqueue(3);
$queue->enqueue(4);
$iterator = $queue->getIterator();
$this->assertInstanceOf('Collections\\Iterator\\LinkedQueueIterator', $iterator);
$this->assertCount(4, $iterator);
$expectedKey = 0;
$expectedValue = 1;
$iterator->rewind();
for ($i = 0; $i < 4; $i++) {
$this->assertTrue($iterator->valid());
$this->assertEquals($expectedKey++, $iterator->key());
$this->assertEquals($expectedValue++, $iterator->current());
$iterator->next();
}
$this->assertFalse($iterator->valid());
}
/**
* @depends testPopOne
*/
public function testContains()
{
$queue = new LinkedQueue();
$this->assertFalse($queue->contains(0));
$queue->enqueue(1);
$this->assertFalse($queue->contains(0));
$queue->enqueue(0);
$this->assertTrue($queue->contains(0));
$queue->dequeue();
$this->assertTrue($queue->contains(0));
$queue->dequeue();
$this->assertFalse($queue->contains(0));
}
public function testClear()
{
$queue = new LinkedQueue();
$queue->enqueue(0);
$queue->clear();
$this->assertCount(0, $queue);
}
public function testToArrayEmpty()
{
$queue = new LinkedQueue();
$array = $queue->toArray();
$this->assertTrue(is_array($array));
$this->assertCount(0, $array);
}
public function testToArray()
{
$queue = new LinkedQueue();
for ($i = 0; $i < 3; $i++) {
$queue->enqueue($i);
}
$array = $queue->toArray();
$this->assertTrue(is_array($array));
$this->assertCount(3, $array);
$i = 0;
foreach ($array as $item) {
$this->assertEquals($i++, $item);
}
}
}
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