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/*
* DSI utilities
*
* Copyright (C) 2010-2023 Sebastiano Vigna
*
* This program and the accompanying materials are made available under the
* terms of the GNU Lesser General Public License v2.1 or later,
* which is available at
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1-standalone.html,
* or the Apache Software License 2.0, which is available at
* https://www.apache.org/licenses/LICENSE-2.0.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.
*
* SPDX-License-Identifier: LGPL-2.1-or-later OR Apache-2.0
*/
package it.unimi.dsi.io;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.junit.Test;
import it.unimi.dsi.fastutil.objects.ObjectIterator;
import it.unimi.dsi.fastutil.objects.ObjectIterators;
import it.unimi.dsi.lang.MutableString;
public class OfflineIterableTest {
public void doIt(final String[] strings) throws IOException {
final OfflineIterable.Serializer<MutableString,MutableString> stringSerializer = new OfflineIterable.Serializer<MutableString,MutableString>() {
@Override
public void read(final DataInput dis, final MutableString x) throws IOException {
x.readSelfDelimUTF8((InputStream)dis);
}
@Override
public void write(final MutableString x, final DataOutput dos) throws IOException {
x.writeSelfDelimUTF8((OutputStream)dos);
}
};
final OfflineIterable<MutableString,MutableString> stringIterable = new OfflineIterable<>(stringSerializer, new MutableString());
for (final String s: strings)
stringIterable.add(new MutableString(s));
ObjectIterator<String> shouldBe = ObjectIterators.wrap(strings);
for (final MutableString m: stringIterable)
assertEquals(new MutableString(shouldBe.next()), m);
assertFalse(shouldBe.hasNext());
// Let's do it again.
stringIterable.clear();
for (final String s: strings)
stringIterable.add(new MutableString(s));
shouldBe = ObjectIterators.wrap(strings);
for (final MutableString m: stringIterable)
assertEquals(new MutableString(shouldBe.next()), m);
assertFalse(shouldBe.hasNext());
stringIterable.close();
stringIterable.close(); // Twice, to test for safety
}
@Test
public void testSimple() throws IOException {
doIt(new String[] { "this", "is", "a", "test" });
}
@Test
public void testEmpty() throws IOException {
doIt(new String[0]);
}
}
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