/**
* Runs two queries in parallel.
*
* @throws IOException I/O exception
*/
@Test
public void queryParallel() throws IOException {
final Query query1 = session.query("1 to 2");
final Query query2 = session.query("reverse(3 to 4)");
assertEqual("1", query1.next());
assertEqual("4", query2.next());
assertEqual("2", query1.next());
assertEqual("3", query2.next());
assertNull(query1.next());
assertNull(query2.next());
query1.close();
query2.close();
}
/**
* Runs a query with an external variable declaration.
*
* @throws IOException I/O exception
*/
@Test
public void queryBindEmptySequence() throws IOException {
final Query query = session.query("declare variable $a external; $a");
query.bind("a", "()", "empty-sequence()");
assertNull(query.next());
query.close();
}
/**
* Runs a query, omitting more().
*
* @throws IOException I/O exception
*/
@Test
public void queryNoMore() throws IOException {
final Query query = session.query("1 to 2");
assertEqual("1", query.next());
assertEqual("2", query.next());
assertNull(query.next());
query.close();
}
/**
* Queries empty content.
*
* @throws IOException I/O exception
*/
@Test
public void queryEmptyString() throws IOException {
final Query q = session.query("'',1");
assertTrue(q.more());
assertEqual("", q.next());
assertTrue(q.more());
assertEqual("1", q.next());
assertNull(q.next());
}
/** Test for method {@link IndexCache#delete(byte[])}. */
@Test
public void testDelete() {
final byte[] key = token("keyDelete");
final int size = 10;
final long pointer = 12L;
cache.add(key, size, pointer);
cache.delete(key);
assertNull(cache.get(key));
}
/** Test for method {@link IndexCache#get(byte[])}. */
@Test
public void testGetNotExisting() {
for (int i = 0; i < 4000; ++i) {
final byte[] key = token("keyAdd" + i);
final long pointer = i + 5000L;
cache.add(key, i, pointer);
assertCacheEntry(key, i, pointer);
}
assertNull(cache.get(token("keyAdd" + 4000)));
}
/**
* Queries empty content.
*
* @throws IOException I/O exception
*/
@Test
public void queryEmptyBinary() throws IOException {
session.execute("create db " + NAME);
session.store("X", new ArrayInput(""));
assertEqual("", session.execute("xquery " + RAW + _DB_RETRIEVE.args(NAME, "X")));
assertEqual("", session.query(RAW + _DB_RETRIEVE.args(NAME, "X")).execute());
final Query q = session.query(RAW + _DB_RETRIEVE.args(NAME, "X"));
assertTrue(q.more());
assertEqual("", q.next());
assertNull(q.next());
}
/**
* Queries binary content (works only if output stream is specified).
*
* @throws IOException I/O exception
*/
@Test
public void queryBinary() throws IOException {
if (out == null) return;
session.execute("create db " + NAME);
final byte[] tmp = {0, 1, 2, 127, 0, -1, -2, -128};
session.store("X", new ArrayInput(tmp));
final String retr = _DB_RETRIEVE.args(NAME, "X");
// check command
session.execute("xquery " + RAW + retr + ',' + retr);
assertTrue(eq(out.toArray(), concat(tmp, tmp)));
out.reset();
// check query execution
session.query(RAW + retr + ',' + retr).execute();
assertTrue(eq(out.toArray(), concat(tmp, tmp)));
out.reset();
// check iterator
final Query q = session.query(RAW + retr + ',' + retr);
q.next();
assertTrue(eq(out.toArray(), tmp));
out.reset();
q.next();
assertTrue(eq(out.toArray(), tmp));
assertNull(q.next());
}