@Test
  public void testFailIfFipsModeUsed() throws Exception {
    Assume.assumeTrue(TinkFips.useOnlyFips());

    assertThrows(GeneralSecurityException.class, () -> testEncryptDecrypt(16, 12, 256, 0, 20, 64));
  }
Encrypt some plaintext to a file, then decrypt from the file
java_src/src/test/java/com/google/crypto/tink/subtle/AesCtrHmacStreamingTest.java