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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.fsa.test;
import com.yahoo.fsa.FSA;
import org.junit.Before;
import org.junit.Test;
import java.util.Iterator;
import java.nio.charset.Charset;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
/**
* @author geirst
*/
public class UTF8TestCase {
private Charset charset = Charset.forName("utf-8");
private FSA fsa;
private FSA.State state;
private byte prefixBuf[];
private byte suffixBuf[];
private String prefix;
private String suffix;
private String word;
private static byte [] convert(int [] buf) {
byte retval[] = new byte[buf.length];
for (int i = 0; i < buf.length; ++i) {
retval[i] = (byte)buf[i];
}
return retval;
}
@Before
public void setUp() {
fsa = new FSA("src/test/fsa/utf8.fsa"); // fsa with one word (6 code points, 18 bytes)
state = fsa.getState();
int pbuf[] = {0xe0,0xa4,0xb9};
prefixBuf = convert(pbuf);
prefix = new String(prefixBuf, charset);
int sbuf[] = {0xe0,0xa4,0xbf,0xe0,0xa4,0xa8,0xe0,0xa5,0x8d,0xe0,0xa4,0xa6,0xe0,0xa5,0x80};
suffixBuf = convert(sbuf);
suffix = new String(suffixBuf, charset);
word = prefix + suffix;
}
@Test
public void testStringDelta() {
state.delta(word);
assertTrue(state.isFinal());
}
@Test
public void testCharDelta() {
assertEquals(6, word.length());
for (int i = 0; i < word.length(); ++i) {
state.delta(word.charAt(i));
assertTrue(state.isValid());
}
assertTrue(state.isFinal());
}
@Test
public void testByteDelta() {
FSA.State state = fsa.getState();
assertEquals(3, prefixBuf.length);
for (int i = 0; i < prefixBuf.length; ++i) {
state.delta(prefixBuf[i]);
assertTrue(state.isValid());
}
assertEquals(15, suffixBuf.length);
for (int i = 0; i < suffixBuf.length; ++i) {
state.delta(suffixBuf[i]);
assertTrue(state.isValid());
}
assertTrue(state.isFinal());
}
@Test
public void testIteratorAtStart() {
Iterator<FSA.Iterator.Item> itr = fsa.iterator(state);
FSA.Iterator.Item item = itr.next();
assertEquals(word, item.getString());
assertFalse(itr.hasNext());
}
@Test
public void testIteratorWithPrefix() {
state.delta(prefix);
Iterator<FSA.Iterator.Item> itr = fsa.iterator(state);
FSA.Iterator.Item item = itr.next();
assertEquals(suffix, item.getString());
assertFalse(itr.hasNext());
}
@Test
public void testIteratorWithCompleteWord() {
state.delta(word);
Iterator<FSA.Iterator.Item> itr = fsa.iterator(state);
FSA.Iterator.Item item = itr.next();
assertEquals("", item.getString());
assertFalse(itr.hasNext());
}
}
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