package org.apache.lucene.analysis.util;
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.util.Arrays;
import org.apache.lucene.analysis.util.CharacterUtils.CharacterBuffer;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util.TestUtil;
import org.junit.Test;
/**
* TestCase for the {@link CharacterUtils} class.
*/
public class TestCharacterUtils extends LuceneTestCase {
@Test
public void testCodePointAtCharSequenceInt() {
CharacterUtils java4 = CharacterUtils.getJava4Instance();
String cpAt3 = "Abc\ud801\udc1c";
String highSurrogateAt3 = "Abc\ud801";
assertEquals((int) 'A', java4.codePointAt(cpAt3, 0));
assertEquals((int) '\ud801', java4.codePointAt(cpAt3, 3));
assertEquals((int) '\ud801', java4.codePointAt(highSurrogateAt3, 3));
try {
java4.codePointAt(highSurrogateAt3, 4);
fail("string index out of bounds");
} catch (IndexOutOfBoundsException e) {
}
CharacterUtils java5 = CharacterUtils.getInstance(TEST_VERSION_CURRENT);
assertEquals((int) 'A', java5.codePointAt(cpAt3, 0));
assertEquals(Character.toCodePoint('\ud801', '\udc1c'), java5.codePointAt(
cpAt3, 3));
assertEquals((int) '\ud801', java5.codePointAt(highSurrogateAt3, 3));
try {
java5.codePointAt(highSurrogateAt3, 4);
fail("string index out of bounds");
} catch (IndexOutOfBoundsException e) {
}
}
@Test
public void testCodePointAtCharArrayIntInt() {
CharacterUtils java4 = CharacterUtils.getJava4Instance();
char[] cpAt3 = "Abc\ud801\udc1c".toCharArray();
char[] highSurrogateAt3 = "Abc\ud801".toCharArray();
assertEquals((int) 'A', java4.codePointAt(cpAt3, 0, 2));
assertEquals((int) '\ud801', java4.codePointAt(cpAt3, 3, 5));
assertEquals((int) '\ud801', java4.codePointAt(highSurrogateAt3, 3, 4));
CharacterUtils java5 = CharacterUtils.getInstance(TEST_VERSION_CURRENT);
assertEquals((int) 'A', java5.codePointAt(cpAt3, 0, 2));
assertEquals(Character.toCodePoint('\ud801', '\udc1c'), java5.codePointAt(
cpAt3, 3, 5));
assertEquals((int) '\ud801', java5.codePointAt(highSurrogateAt3, 3, 4));
}
@Test
public void testCodePointCount() {
CharacterUtils java4 = CharacterUtils.getJava4Instance();
CharacterUtils java5 = CharacterUtils.getInstance(TEST_VERSION_CURRENT);
final String s = TestUtil.randomUnicodeString(random());
assertEquals(s.length(), java4.codePointCount(s));
assertEquals(Character.codePointCount(s, 0, s.length()), java5.codePointCount(s));
}
@Test
public void testOffsetByCodePoint() {
CharacterUtils java4 = CharacterUtils.getJava4Instance();
CharacterUtils java5 = CharacterUtils.getInstance(TEST_VERSION_CURRENT);
for (int i = 0; i < 10; ++i) {
final char[] s = TestUtil.randomUnicodeString(random()).toCharArray();
final int index = TestUtil.nextInt(random(), 0, s.length);
final int offset = random().nextInt(7) - 3;
try {
final int o = java4.offsetByCodePoints(s, 0, s.length, index, offset);
assertEquals(o, index + offset);
} catch (IndexOutOfBoundsException e) {
assertTrue((index + offset) < 0 || (index + offset) > s.length);
}
int o;
try {
o = java5.offsetByCodePoints(s, 0, s.length, index, offset);
} catch (IndexOutOfBoundsException e) {
try {
Character.offsetByCodePoints(s, 0, s.length, index, offset);
fail();
} catch (IndexOutOfBoundsException e2) {
// OK
}
o = -1;
}
if (o >= 0) {
assertEquals(Character.offsetByCodePoints(s, 0, s.length, index, offset), o);
}
}
}
public void testConversions() {
CharacterUtils java4 = CharacterUtils.getJava4Instance();
CharacterUtils java5 = CharacterUtils.getInstance(TEST_VERSION_CURRENT);
testConversions(java4);
testConversions(java5);
}
private void testConversions(CharacterUtils charUtils) {
final char[] orig = TestUtil.randomUnicodeString(random(), 100).toCharArray();
final int[] buf = new int[orig.length];
final char[] restored = new char[buf.length];
final int o1 = TestUtil.nextInt(random(), 0, Math.min(5, orig.length));
final int o2 = TestUtil.nextInt(random(), 0, o1);
final int o3 = TestUtil.nextInt(random(), 0, o1);
final int codePointCount = charUtils.toCodePoints(orig, o1, orig.length - o1, buf, o2);
final int charCount = charUtils.toChars(buf, o2, codePointCount, restored, o3);
assertEquals(orig.length - o1, charCount);
assertArrayEquals(Arrays.copyOfRange(orig, o1, o1 + charCount), Arrays.copyOfRange(restored, o3, o3 + charCount));
}
@Test
public void testNewCharacterBuffer() {
CharacterBuffer newCharacterBuffer = CharacterUtils.newCharacterBuffer(1024);
assertEquals(1024, newCharacterBuffer.getBuffer().length);
assertEquals(0, newCharacterBuffer.getOffset());
assertEquals(0, newCharacterBuffer.getLength());
newCharacterBuffer = CharacterUtils.newCharacterBuffer(2);
assertEquals(2, newCharacterBuffer.getBuffer().length);
assertEquals(0, newCharacterBuffer.getOffset());
assertEquals(0, newCharacterBuffer.getLength());
try {
newCharacterBuffer = CharacterUtils.newCharacterBuffer(1);
fail("length must be >= 2");
} catch (IllegalArgumentException e) {
}
}
@Test
public void testFillNoHighSurrogate() throws IOException {
CharacterUtils versions[] = new CharacterUtils[] {
CharacterUtils.getInstance(TEST_VERSION_CURRENT),
CharacterUtils.getJava4Instance() };
for (CharacterUtils instance : versions) {
Reader reader = new StringReader("helloworld");
CharacterBuffer buffer = CharacterUtils.newCharacterBuffer(6);
assertTrue(instance.fill(buffer,reader));
assertEquals(0, buffer.getOffset());
assertEquals(6, buffer.getLength());
assertEquals("hellow", new String(buffer.getBuffer()));
assertFalse(instance.fill(buffer,reader));
assertEquals(4, buffer.getLength());
assertEquals(0, buffer.getOffset());
assertEquals("orld", new String(buffer.getBuffer(), buffer.getOffset(),
buffer.getLength()));
assertFalse(instance.fill(buffer,reader));
}
}
@Test
public void testFillJava15() throws IOException {
String input = "1234\ud801\udc1c789123\ud801\ud801\udc1c\ud801";
CharacterUtils instance = CharacterUtils.getInstance(TEST_VERSION_CURRENT);
Reader reader = new StringReader(input);
CharacterBuffer buffer = CharacterUtils.newCharacterBuffer(5);
assertTrue(instance.fill(buffer, reader));
assertEquals(4, buffer.getLength());
assertEquals("1234", new String(buffer.getBuffer(), buffer.getOffset(),
buffer.getLength()));
assertTrue(instance.fill(buffer, reader));
assertEquals(5, buffer.getLength());
assertEquals("\ud801\udc1c789", new String(buffer.getBuffer()));
assertTrue(instance.fill(buffer, reader));
assertEquals(4, buffer.getLength());
assertEquals("123\ud801", new String(buffer.getBuffer(),
buffer.getOffset(), buffer.getLength()));
assertFalse(instance.fill(buffer, reader));
assertEquals(3, buffer.getLength());
assertEquals("\ud801\udc1c\ud801", new String(buffer.getBuffer(), buffer
.getOffset(), buffer.getLength()));
assertFalse(instance.fill(buffer, reader));
assertEquals(0, buffer.getLength());
}
@Test
public void testFillJava14() throws IOException {
String input = "1234\ud801\udc1c789123\ud801\ud801\udc1c\ud801";
CharacterUtils instance = CharacterUtils.getJava4Instance();
Reader reader = new StringReader(input);
CharacterBuffer buffer = CharacterUtils.newCharacterBuffer(5);
assertTrue(instance.fill(buffer, reader));
assertEquals(5, buffer.getLength());
assertEquals("1234\ud801", new String(buffer.getBuffer(), buffer
.getOffset(), buffer.getLength()));
assertTrue(instance.fill(buffer, reader));
assertEquals(5, buffer.getLength());
assertEquals("\udc1c7891", new String(buffer.getBuffer()));
buffer = CharacterUtils.newCharacterBuffer(6);
assertTrue(instance.fill(buffer, reader));
assertEquals(6, buffer.getLength());
assertEquals("23\ud801\ud801\udc1c\ud801", new String(buffer.getBuffer(), buffer
.getOffset(), buffer.getLength()));
assertFalse(instance.fill(buffer, reader));
}
}