Examples with LoopingAlphabetStream org.apache.derbyTesting.functionTests.util.streams.LoopingAlphabetStream used on opensource projects

Example 46 with LoopingAlphabetStream

use of org.apache.derbyTesting.functionTests.util.streams.LoopingAlphabetStream in project derby by apache.

the class PositionedStoreStreamTest method testSimpleReadSequence.

/**
 * Executes a simple read sequence against the lower case modern latin
 * alphabet, which involves some repositioning.
 */
public void testSimpleReadSequence() throws IOException, StandardException {
    InputStream in = new LoopingAlphabetStream(26);
    PositionedStoreStream pss = new PositionedStoreStream(in);
    assertEquals('a', pss.read());
    pss.reposition(9);
    assertEquals('j', pss.read());
    pss.reposition(10);
    assertEquals('k', pss.read());
    pss.reposition(9);
    assertEquals('j', pss.read());
    pss.reposition(25);
    assertEquals('z', pss.read());
    assertEquals(-1, pss.read());
    pss.reposition(1);
    assertEquals('b', pss.read());
    pss.reposition(1);
    assertEquals('b', pss.read());
}

Example 47 with LoopingAlphabetStream

use of org.apache.derbyTesting.functionTests.util.streams.LoopingAlphabetStream in project derby by apache.

the class PositionedStoreStreamTest method testPositionAfterEOFReadArray.

/**
 * Verifies that reading after EOF doesn't change the position.
 */
public void testPositionAfterEOFReadArray() throws IOException, StandardException {
    InputStream in = new LoopingAlphabetStream(10);
    PositionedStoreStream pss = new PositionedStoreStream(in);
    assertEquals(0, pss.getPosition());
    byte[] two = new byte[2];
    for (int i = 0; i < 10; i += 2) {
        assertEquals(2, pss.read(two, 0, 2));
        assertEquals(i + 2, pss.getPosition());
    }
    assertEquals(10, pss.getPosition());
    assertEquals(-1, pss.read(two, 0, 2));
    assertEquals(10, pss.getPosition());
    assertEquals(-1, pss.read(two, 0, 2));
    assertEquals(0, pss.skip(21));
    assertEquals(-1, pss.read());
    assertEquals(10, pss.getPosition());
    pss.resetStream();
    assertEquals(0, pss.getPosition());
}

Example 48 with LoopingAlphabetStream

use of org.apache.derbyTesting.functionTests.util.streams.LoopingAlphabetStream in project derby by apache.

the class PositionedStoreStreamTest method testRepositionForwards.

public void testRepositionForwards() throws IOException, StandardException {
    final long length = 20L;
    InputStream in = new LoopingAlphabetStream(length);
    PositionedStoreStream pss = new PositionedStoreStream(in);
    assertEquals(0, pss.getPosition());
    // Position forwards one by one.
    for (int i = 0; i < length; i++) {
        InputStream inComp = new LoopingAlphabetStream(length);
        pss.reposition(i);
        inComp.skip(i);
        assertEquals(inComp.read(), pss.read());
    }
    // Position forwards two by two.
    for (int i = 1; i < length; i += 2) {
        InputStream inComp = new LoopingAlphabetStream(length);
        pss.reposition(i);
        inComp.skip(i);
        assertEquals(inComp.read(), pss.read());
    }
}

Example 49 with LoopingAlphabetStream

use of org.apache.derbyTesting.functionTests.util.streams.LoopingAlphabetStream in project derby by apache.

the class LobLengthTest method testLongLobLengths.

/**
 * There was a defect (DERBY-121) where the server and client
 * were processing lob lengths incorrectly.  For lob lengths
 * that are represented by 24 or more bits, the server and
 * Derby client were doing incorrect bit-shifting.  This
 * test makes sure that problem no longer occurs.
 */
public void testLongLobLengths() throws Exception {
    PreparedStatement pSt = prepareStatement("insert into lobTable100M(bl) values (?)");
    // The error we're testing occurs when the server
    // is shifting bits 24 and higher of the lob's
    // length (in bytes).  This means that, in order
    // to check for the error, we have to specify a
    // lob length (in bytes) that requires at least
    // 24 bits to represent.  Thus for a blob the
    // length of the test data must be specified as
    // at least 2^24 bytes (hence the '16800000' in
    // the next line).
    int lobSize = 16800000;
    pSt.setBinaryStream(1, new LoopingAlphabetStream(lobSize), lobSize);
    // Now try the insert; this is where the server processes
    // the lob length.
    pSt.execute();
    pSt.close();
}

Example 50 with LoopingAlphabetStream

use of org.apache.derbyTesting.functionTests.util.streams.LoopingAlphabetStream in project derby by apache.

the class LobStreamsTest method testClobAsciiWrite1Param.

/**
 * Tests the ClobOutputStream.write(int b) method
 */
public void testClobAsciiWrite1Param() throws Exception {
    InputStream streamIn = new LoopingAlphabetStream(streamSize[1]);
    PreparedStatement stmt3 = prepareStatement("SELECT c FROM testBlobX1 WHERE a = 1");
    ResultSet rs3 = stmt3.executeQuery();
    rs3.next();
    Clob clob = rs3.getClob(1);
    assertTrue("FAIL -- clob is NULL", clob != null);
    int buffer;
    OutputStream outstream = clob.setAsciiStream(1L);
    while ((buffer = streamIn.read()) != -1) {
        outstream.write(buffer);
    }
    outstream.close();
    streamIn.close();
    PreparedStatement stmt4 = prepareStatement("UPDATE testBlobX1 SET c = ? WHERE a = 1");
    stmt4.setClob(1, clob);
    stmt4.executeUpdate();
    stmt4.close();
    rs3.close();
    rs3 = stmt3.executeQuery();
    assertTrue("FAIL -- clob not found", rs3.next());
    clob = rs3.getClob(1);
    long new_length = clob.length();
    assertEquals("FAIL -- wrong clob length", streamSize[1], new_length);
    // Check contents ...
    InputStream fStream = new LoopingAlphabetStream(streamSize[1]);
    InputStream lStream = clob.getAsciiStream();
    assertTrue("FAIL - Clob and file contents do not match", compareLob2File(fStream, lStream));
    fStream.close();
    lStream.close();
    rs3.close();
    stmt3.close();
}