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// Copyright Yahoo. 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.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
/**
* @author geirst
*/
public class FSAIteratorTestCase {
private FSA fsa;
private FSA.State state;
private List<String> expected;
@Before
public void setUp() {
fsa = new FSA("src/test/fsa/test-iterator.fsa");
state = fsa.getState();
expected = new ArrayList<String>();
expected.add("abacus");
expected.add("abadan");
expected.add("abaisse");
expected.add("abdicate");
expected.add("abdomen");
expected.add("abdominous");
expected.add("dachs");
expected.add("dacia");
expected.add("daciaa");
expected.add("daciab");
expected.add("dacite");
expected.add("dacota");
}
private void checkIterator(int beginIdx, int endIdx, String prefix) {
System.out.println("checkIterator(" + beginIdx + ", " + endIdx + ", " + prefix + ")");
java.util.Iterator<FSA.Iterator.Item> i = fsa.iterator(state);
for (; i.hasNext() && beginIdx < endIdx; ++beginIdx) {
FSA.Iterator.Item item = i.next();
System.out.println("item: " + item);
String str = prefix + item.getString();
String data = item.getDataString();
System.out.println("str: '" + expected.get(beginIdx) + "'.equals('" + str + "')?");
assertTrue(expected.get(beginIdx).equals(str));
System.out.println("data: '" + expected.get(beginIdx) + "'.equals('" + data + "')?");
assertTrue(expected.get(beginIdx).equals(data));
}
assertFalse(i.hasNext());
assertTrue(beginIdx == endIdx);
}
@Test
public void testIterator() {
checkIterator(0, expected.size(), "");
}
@Test
public void testIteratorSingle() {
state.delta("dach");
checkIterator(6, 7, "dach");
}
@Test
public void testIteratorSubset() {
state.delta("abd");
checkIterator(3, 6, "abd");
}
@Test
public void testIteratorFinalState() {
state.delta("dacia");
checkIterator(7, 10, "dacia");
}
@Test
public void testIteratorFinalStateOnly() {
state.delta("dachs");
checkIterator(6, 7, "dachs");
}
@Test
public void testIteratorEmpty1() {
state.delta("b");
FSA.Iterator i = fsa.iterator(state);
assertFalse(i.hasNext());
try {
i.next();
assertFalse(true);
} catch (NoSuchElementException e) {
assertTrue(true);
}
}
@Test
public void testIteratorEmpty2() {
state.delta("daciac");
FSA.Iterator i = fsa.iterator(state);
assertFalse(i.hasNext());
try {
i.next();
assertFalse(true);
} catch (NoSuchElementException e) {
assertTrue(true);
}
}
@Test
public void testIteratorRemove() {
FSA.Iterator i = fsa.iterator(state);
try {
i.remove();
assertFalse(true);
} catch (UnsupportedOperationException e) {
assertTrue(true);
}
}
}
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