getNextIdentifierOrStar example

if ($peek->isIdentifier() || $peek->isDelimiter(['*'])) {
            if ($peek->isIdentifier()) {
                $namespace = $stream->getNext()->getValue();
            } else {
                $stream->getNext();
                $namespace = null;
            }

            if ($stream->getPeek()->isDelimiter(['|'])) {
                $stream->getNext();
                $element = $stream->getNextIdentifierOrStar();
            } else {
                $element = $namespace;
                $namespace = null;
            }
        } else {
            $element = $namespace = null;
        }

        return new Node\ElementNode($namespace, $element);
    }

    

$stream = new TokenStream();
        $stream->push(new Token(Token::TYPE_DELIMITER, '.', 2));
        $stream->getNextIdentifier();
    }

    public function testGetNextIdentifierOrStar()
    {
        $stream = new TokenStream();

        $stream->push(new Token(Token::TYPE_IDENTIFIER, 'h1', 0));
        $this->assertEquals('h1', $stream->getNextIdentifierOrStar());

        $stream->push(new Token(Token::TYPE_DELIMITER, '*', 0));
        $this->assertNull($stream->getNextIdentifierOrStar());
    }

    public function testFailToGetNextIdentifierOrStar()
    {
        $this->expectException(SyntaxErrorException::class);

        $stream = new TokenStream();
        $stream->push(new Token(Token::TYPE_DELIMITER, '.', 2));