### Question:
SignatureAlgorithmConverter { static String toJavaName(String opensslName) { if (opensslName == null) { return null; } Matcher matcher = PATTERN.matcher(opensslName); if (matcher.matches()) { String group1 = matcher.group(1); if (group1 != null) { return group1.toUpperCase(Locale.ROOT) + "with" + matcher.group(2).toUpperCase(Locale.ROOT); } if (matcher.group(3) != null) { return matcher.group(4).toUpperCase(Locale.ROOT) + "with" + matcher.group(3).toUpperCase(Locale.ROOT); } if (matcher.group(5) != null) { return matcher.group(6).toUpperCase(Locale.ROOT) + "with" + matcher.group(5).toUpperCase(Locale.ROOT); } } return null; } private  SignatureAlgorithmConverter();   }### Answer:
@Test public void testWithEncryption() { assertEquals("SHA512withRSA", SignatureAlgorithmConverter.toJavaName("sha512WithRSAEncryption")); }
@Test public void testWithDash() { assertEquals("SHA256withECDSA", SignatureAlgorithmConverter.toJavaName("ecdsa-with-SHA256")); }
@Test public void testWithUnderscore() { assertEquals("SHA256withDSA", SignatureAlgorithmConverter.toJavaName("dsa_with_SHA256")); }
@Test public void testBoringSSLOneUnderscore() { assertEquals("SHA256withECDSA", SignatureAlgorithmConverter.toJavaName("ecdsa_sha256")); }
@Test public void testBoringSSLPkcs1() { assertEquals("SHA256withRSA", SignatureAlgorithmConverter.toJavaName("rsa_pkcs1_sha256")); }
@Test public void testBoringSSLPSS() { assertEquals("SHA256withRSA", SignatureAlgorithmConverter.toJavaName("rsa_pss_rsae_sha256")); }
@Test public void testInvalid() { assertNull(SignatureAlgorithmConverter.toJavaName("ThisIsSomethingInvalid")); }