/** Tests edge conditions: null or empty arguments */
@Test
public void testEdge() {
assertNull(EncodingUtils.encodeBase64(null));
assertNull(EncodingUtils.decodeBase64(null));
String encoded = EncodingUtils.encodeBase64(decoded4);
assertNotNull(encoded);
assertEquals(encoded4, encoded);
byte[] decoded = EncodingUtils.decodeBase64(encoded);
compareArrays(decoded4, decoded);
}
/** Tests encoding using hand-calculated examples. */
@Test
public void testHandCoded() {
String encoded = EncodingUtils.encodeBase64(decoded1.getBytes());
assertEquals(encoded1, encoded);
byte[] bytes = EncodingUtils.decodeBase64(encoded2);
String decoded = new String(bytes);
assertEquals(decoded2, decoded);
String testZeroes = EncodingUtils.encodeBase64(decoded3);
assertEquals(encoded3, testZeroes);
byte[] roundtripBytes = EncodingUtils.decodeBase64(testZeroes);
compareArrays(decoded3, roundtripBytes);
byte[] bytesInvalidChars = EncodingUtils.decodeBase64(encoded5);
String decodedInvalidChars = new String(bytesInvalidChars);
assertEquals(decoded5, decodedInvalidChars);
String shortSample = EncodingUtils.encodeBase64(decoded6.getBytes());
assertEquals(encoded6, shortSample);
assertEquals(decoded6, new String(EncodingUtils.decodeBase64(shortSample)));
}
/** Tests round trip using large random sequences */
@Test
public void testRandom() {
Random generator = new Random(System.currentTimeMillis());
for (int i = 0; i < RANDOM_ITERATIONS; i++) {
// length of array is random in [100, 1000)
int length = 100 + generator.nextInt(900);
byte[] bytes = new byte[length];
generator.nextBytes(bytes);
// round trip
String encoded = EncodingUtils.encodeBase64(bytes);
byte[] decoded = EncodingUtils.decodeBase64(encoded);
compareArrays(bytes, decoded);
}
}