@Test
public void fromBase64ToString_ShouldDecodeToBase64String() {

    PowerMockito.when(Base64.decode(TEST_VALUE_BASE64.getBytes(SSCharset.CHARSET), Base64.NO_WRAP))
            .thenReturn(TEST_VALUE.getBytes(SSCharset.CHARSET));
    Assert.assertEquals(TEST_VALUE, encoding.fromBase64ToString(TEST_VALUE_BASE64));
}