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package invalid.lena.scrcpy;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import org.junit.Test;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
public class SyncTest {
private static final String PATH = "/data/local/tmp/scrcpy-server.jar";
private static final int MODE = 0100644;
private static final int MTIME = 0x12345678;
@Test
public void emptyPayloadFraming() throws Exception {
byte[] payload = new byte[0];
ByteArrayOutputStream framed = new ByteArrayOutputStream();
ByteArrayInputStream resp = okayResponse();
long total = Sync.push(new ByteArrayInputStream(payload), framed, resp, PATH, MODE, MTIME);
assertEquals(0L, total);
byte[] bytes = framed.toByteArray();
int pos = 0;
// SEND + le32(headerLen) + header
String header = PATH + "," + MODE;
byte[] hb = header.getBytes(StandardCharsets.UTF_8);
pos = assertTag(bytes, pos, "SEND");
assertEquals(hb.length, Wire.readLe32(bytes, pos)); pos += 4;
for (int i = 0; i < hb.length; i++, pos++) assertEquals(hb[i], bytes[pos]);
// No DATA chunks for empty payload.
// DONE + le32(mtime)
pos = assertTag(bytes, pos, "DONE");
assertEquals(MTIME, Wire.readLe32(bytes, pos)); pos += 4;
assertEquals(bytes.length, pos);
}
@Test
public void singleByteIsOneDataChunk() throws Exception {
ByteArrayOutputStream framed = new ByteArrayOutputStream();
long total = Sync.push(new ByteArrayInputStream(new byte[]{0x42}),
framed, okayResponse(), PATH, MODE, MTIME);
assertEquals(1L, total);
byte[] bytes = framed.toByteArray();
int pos = skipSendHeader(bytes);
pos = assertTag(bytes, pos, "DATA");
assertEquals(1, Wire.readLe32(bytes, pos)); pos += 4;
assertEquals(0x42, bytes[pos]); pos += 1;
pos = assertTag(bytes, pos, "DONE");
assertEquals(MTIME, Wire.readLe32(bytes, pos)); pos += 4;
assertEquals(bytes.length, pos);
}
@Test
public void payloadLargerThanChunkSplits() throws Exception {
int n = Sync.CHUNK + 1;
byte[] payload = new byte[n];
for (int i = 0; i < n; i++) payload[i] = (byte) i;
ByteArrayOutputStream framed = new ByteArrayOutputStream();
long total = Sync.push(new ByteArrayInputStream(payload),
framed, okayResponse(), PATH, MODE, MTIME);
assertEquals(n, total);
byte[] bytes = framed.toByteArray();
int pos = skipSendHeader(bytes);
// First DATA = full chunk
pos = assertTag(bytes, pos, "DATA");
assertEquals(Sync.CHUNK, Wire.readLe32(bytes, pos)); pos += 4;
pos += Sync.CHUNK;
// Second DATA = the remaining one byte
pos = assertTag(bytes, pos, "DATA");
assertEquals(1, Wire.readLe32(bytes, pos)); pos += 4;
pos += 1;
pos = assertTag(bytes, pos, "DONE");
assertEquals(MTIME, Wire.readLe32(bytes, pos)); pos += 4;
assertEquals(bytes.length, pos);
}
@Test
public void failResponseRaises() {
ByteArrayOutputStream framed = new ByteArrayOutputStream();
ByteArrayInputStream resp = failResponse("disk full");
try {
Sync.push(new ByteArrayInputStream(new byte[]{1, 2, 3}), framed, resp,
PATH, MODE, MTIME);
fail("expected IOException");
} catch (IOException e) {
assertTrue(e.getMessage(), e.getMessage().contains("disk full"));
assertTrue(e.getMessage(), e.getMessage().startsWith("sync FAIL"));
}
}
private static ByteArrayInputStream okayResponse() {
byte[] r = new byte[8];
r[0] = 'O'; r[1] = 'K'; r[2] = 'A'; r[3] = 'Y';
// length 0
return new ByteArrayInputStream(r);
}
private static ByteArrayInputStream failResponse(String msg) {
byte[] mb = msg.getBytes(StandardCharsets.UTF_8);
byte[] r = new byte[8 + mb.length];
r[0] = 'F'; r[1] = 'A'; r[2] = 'I'; r[3] = 'L';
Wire.writeLe32(r, 4, mb.length);
System.arraycopy(mb, 0, r, 8, mb.length);
return new ByteArrayInputStream(r);
}
private static int assertTag(byte[] bytes, int pos, String tag) {
for (int i = 0; i < 4; i++) {
assertEquals("tag pos=" + pos + " idx=" + i,
(byte) tag.charAt(i), bytes[pos + i]);
}
return pos + 4;
}
private static int skipSendHeader(byte[] bytes) {
// SEND + le32(len) + header
int pos = 4;
int len = Wire.readLe32(bytes, pos);
return pos + 4 + len;
}
}
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