@Test
public void testTargetEmptyString() throws IOException {

    GoogleCredentials credentials = CloudStorageUtils.getCloudStorageCredentials();
    com.google.auth.oauth2.AccessToken rawAccessToken = credentials.refreshAccessToken();
    AccessToken accessToken = new AccessToken(rawAccessToken.getTokenValue(), rawAccessToken.getExpirationTime().getTime());
    AccessToken boundedToken = AccessBoundaryUtils.addAccessBoundary(accessToken, "");
    assertEquals(boundedToken.getValue(), rawAccessToken.getTokenValue());
    assertEquals(boundedToken.getExpiresAt(), rawAccessToken.getExpirationTime().getTime());
}