SiroDiaz / DataStructures

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

    }

    public function testPreorder() {

        $this->tree->put(2, "two");

        $this->tree->put(1, "one");

        $this->tree->put(3, "three");

        $this->tree->preorder(function ($node) {

            // do something with the node

            // echo $node->key . PHP_EOL;

        });

        $this->assertTrue(true);

    }

    public function testInorder() {

        $this->tree->put(2, "two");

        $this->assertTrue(true);

    }

    public function testInorder() {

        $this->tree->put(2, "two");

        $this->tree->put(1, "one");

        $this->tree->put(3, "three");

        $this->tree->inorder(function ($node) {

            // do something with the node

            // echo $node->key . PHP_EOL;

        });

        $this->assertTrue(true);

    }

    public function testPostorder() {

        $this->tree->put(2, "two");

        $this->assertTrue(true);

    }

    public function testPostorder() {

        $this->tree->put(2, "two");

        $this->tree->put(1, "one");

        $this->tree->put(3, "three");

        $this->tree->postorder(function ($node) {

            // do something with the node

            // echo $node->key . PHP_EOL;

        });

        $this->assertTrue(true);

    }

    public function testIsLeaf() {

        $this->tree->put(2, "two");