### Question:
EncryptionService { public boolean isEncrypted(String str) { return StringUtils.startsWith(str, CIPHER_PREFIX); }  boolean isEncrypted(String str); String encrypt(String str); String decrypt(String str);  }### Answer:
@Test public void testIsNotEncrypted() { char[] testValue = {'t', 'h', 'i', 's', 'i', 's', 'a', 't', 'e', 's', 't'}; assertFalse("The value is expected to not be encrypted ", encryptionService.isEncrypted(String.valueOf(testValue))); }
@Test public void testIsEncrypted() { char[] testValue = {'{', 'c', 'i', 'p', 'h', 'e', 'r', '}', 't', 'h', 'i', 's', 'i', 's', 'e', 'n', 'c', 'r', 'p', 't', 'e', 'd'}; assertTrue("The value is expected to not be encrypted ", encryptionService.isEncrypted(String.valueOf(testValue))); }
@Test public void testIsEncryptedShortValue() { char[] testValue = {'h', 'i'}; assertFalse("The value is expected to not be encrypted ", encryptionService.isEncrypted(String.valueOf(testValue))); }
@Test public void testIsEncryptedArrayOutOfBounds() { char[] testValue = {'{', 'c'}; assertFalse("The value is expected to not be encrypted ", encryptionService.isEncrypted(String.valueOf(testValue))); }