### Question:
PGPKeyUtil { public static ByteArrayInputStream readSecretKeyRingInputStream( byte[] keyMaterial ) throws PGPException { return new ByteArrayInputStream( keyMaterial ); }  static String encodeNumericKeyId( long keyId ); static String getKeyId( String fingerprint ); static String getFingerprint( byte[] fingerprint ); static String getShortKeyId( String fingerprint ); static boolean isFingerprint( String keyId ); static boolean isLongKeyId( String keyId ); static boolean isShortKeyId( String keyId ); static boolean isValidKeyId( String keyId ); static String exportAscii( PGPPublicKey pgpKey ); static PGPPublicKey readPublicKey( String armoredKey ); static PGPPublicKey readPublicKey( InputStream instr ); static PGPPublicKeyRing readPublicKeyRing( byte[] keyMaterial ); PGPPublicKeyRing getPublicKeyRing( byte[] keyMaterial ); static PGPPublicKeyRing readPublicKeyRing( String armoredKey ); static PGPPublicKeyRing readPublicKeyRing( InputStream instr ); static boolean isValidPublicKeyring( String publicKey ); static PGPSecretKeyRing readSecretKeyRing( byte[] keyMaterial ); PGPSecretKeyRing getSecretKeyRing( byte[] keyMaterial ); static ByteArrayInputStream readSecretKeyRingInputStream( byte[] keyMaterial ); static PGPSecretKeyRing readSecretKeyRing( InputStream instr ); static PGPPublicKey readPublicKey( PGPPublicKeyRing keyRing ); static PGPSecretKey readSecretKey( PGPSecretKeyRing keyRing ); static final int HEX_SHORT_KEY_ID_LENGTH; static final int HEX_LONG_KEY_ID_LENGTH; static final int HEX_V3_FINGERPRINT_LENGTH; static final int HEX_V4_FINGERPRINT_LENGTH; }### Answer:
@Test public void testReadSecretKeyRingInputStream() throws Exception { assertNotNull( PGPKeyUtil.readSecretKeyRingInputStream( IOUtils.toByteArray( PGPEncryptionUtilTest.findFile( PGPEncryptionUtilTest.SECRET_KEYRING ) ) ) ); }