Moved classes from messaging package to sync package.

briar-tests/src/org/briarproject/sync/ConsumersTest.java

@@ -0,0 +1,108 @@
+package org.briarproject.sync;
+
+import org.briarproject.BriarTestCase;
+import org.briarproject.api.FormatException;
+import org.briarproject.api.crypto.MessageDigest;
+import org.junit.Test;
+
+import java.security.GeneralSecurityException;
+import java.util.Random;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+public class ConsumersTest extends BriarTestCase {
+
+	@Test
+	public void testDigestingConsumer() throws Exception {
+		byte[] data = new byte[1234];
+		// Generate some random data and digest it
+		new Random().nextBytes(data);
+		MessageDigest messageDigest = new TestMessageDigest();
+		messageDigest.update(data);
+		byte[] dig = messageDigest.digest();
+		// Check that feeding a DigestingConsumer generates the same digest
+		org.briarproject.sync.DigestingConsumer
+				dc = new org.briarproject.sync.DigestingConsumer(messageDigest);
+		dc.write(data[0]);
+		dc.write(data, 1, data.length - 2);
+		dc.write(data[data.length - 1]);
+		byte[] dig1 = messageDigest.digest();
+		assertArrayEquals(dig, dig1);
+	}
+
+	@Test
+	public void testCountingConsumer() throws Exception {
+		byte[] data = new byte[1234];
+		org.briarproject.sync.CountingConsumer
+				cc = new org.briarproject.sync.CountingConsumer(data.length);
+		cc.write(data[0]);
+		cc.write(data, 1, data.length - 2);
+		cc.write(data[data.length - 1]);
+		assertEquals(data.length, cc.getCount());
+		try {
+			cc.write((byte) 0);
+			fail();
+		} catch (FormatException expected) {
+			// Expected
+		}
+	}
+
+	@Test
+	public void testCopyingConsumer() throws Exception {
+		byte[] data = new byte[1234];
+		new Random().nextBytes(data);
+		// Check that a CopyingConsumer creates a faithful copy
+		org.briarproject.sync.CopyingConsumer
+				cc = new org.briarproject.sync.CopyingConsumer();
+		cc.write(data[0]);
+		cc.write(data, 1, data.length - 2);
+		cc.write(data[data.length - 1]);
+		assertArrayEquals(data, cc.getCopy());
+	}
+
+	private static class TestMessageDigest implements MessageDigest {
+
+		private final java.security.MessageDigest delegate;
+
+		private TestMessageDigest() throws GeneralSecurityException {
+			delegate = java.security.MessageDigest.getInstance("SHA-256");
+		}
+
+		public byte[] digest() {
+			return delegate.digest();
+		}
+
+		public byte[] digest(byte[] input) {
+			return delegate.digest(input);
+		}
+
+		public int digest(byte[] buf, int offset, int len) {
+			byte[] digest = digest();
+			len = Math.min(len, digest.length);
+			System.arraycopy(digest, 0, buf, offset, len);
+			return len;
+		}
+
+		public int getDigestLength() {
+			return delegate.getDigestLength();
+		}
+
+		public void reset() {
+			delegate.reset();
+		}
+
+		public void update(byte input) {
+			delegate.update(input);
+		}
+
+		public void update(byte[] input) {
+			delegate.update(input);
+		}
+
+		public void update(byte[] input, int offset, int len) {
+			delegate.update(input, offset, len);
+		}
+	}
+}