@Test
    public void shouldThrowErrorWhenFileSizeTooBig() throws IOException {
        //given
        File tmpFile = folder.newFile(FILENAME);
        String filePathString = tmpFile.getAbsolutePath();
        Path filePath = Paths.get(filePathString);
        byte[] bytes = new byte[260000];
        Files.write(filePath, bytes, StandardOpenOption.APPEND);
        //when
        try {
            FileParser fileParser = new FileParser(filePathString);
            fileParser.parse();
        } catch (GOLException e) {
            //then
            String msg = "Dateigröße darf maximal 250kb betragen.";
            assertEquals(msg, e.getMessage());
        }
    }