@Test
public void fromBase64ToBytes_ShouldDecodeToBase64String() {

    byte[] expectedBytes = TEST_VALUE.getBytes(SSCharset.CHARSET);
    PowerMockito.when(Base64.decode(TEST_VALUE_BASE64.getBytes(SSCharset.CHARSET), Base64.NO_WRAP))
            .thenReturn(expectedBytes);
    Assert.assertTrue(Arrays.equals(expectedBytes, encoding.fromBase64ToBytes(TEST_VALUE_BASE64)));
}