@Test
void getFileAsString() throws IOException {

    Path path = Paths.get(rootProjectDir.getRoot().toPath().toString(), "file.file");
    Files.write(path, "Test".getBytes(Charset.defaultCharset()));
    String content = FileUtils.INSTANCE.getFileAsString(path.toFile());
    assertNotNull(content);
    assertEquals("Test", content);
}