SiroDiaz / DataStructures

        $this->assertEquals($this->stack->peek(), 5);

    }

    public function testPop() {

        $this->stack = new Stack();

        $this->assertNull($this->stack->pop());

        $this->stack->push(1);

        $this->stack->push(2);

        $this->stack->push(3);

        $this->stack->push(4);

        $this->stack->push(5);

        $this->assertEquals($this->stack->pop(), 5);

        $this->assertEquals($this->stack->pop(), 4);

        $this->assertEquals($this->stack->pop(), 3);

        $this->assertEquals($this->stack->pop(), 2);

        $this->assertEquals($this->stack->pop(), 1);

    }

    public function testDequeueWithMaxSize() {

        $this->stack = new Stack(4);

        $this->stack->push(6);

    }

    public function testSize() {

        $this->stack = new Stack();

        $this->assertEquals($this->stack->size(), 0);

        $this->stack->push(1);

        $this->assertEquals($this->stack->size(), 1);

        $this->stack->push(2);

        $this->assertEquals($this->stack->size(), 2);

        $this->stack->push(3);

        $this->assertEquals($this->stack->size(), 3);

        $this->stack->push(4);

        $this->assertEquals($this->stack->size(), 4);

        $this->stack->push(5);

        $this->assertEquals($this->stack->size(), 5);

    }

    public function testEmpty() {

        $this->stack = new Stack();