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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed 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.
*/
package libcore.java.text;
import java.text.BreakIterator;
import java.util.ArrayList;
import java.util.Locale;
public class BreakIteratorTest extends junit.framework.TestCase {
BreakIterator iterator;
@Override
protected void setUp() throws Exception {
super.setUp();
iterator = BreakIterator.getCharacterInstance(Locale.US);
}
public void testGetAvailableLocales() {
Locale[] locales = BreakIterator.getAvailableLocales();
assertTrue("Array available locales is null", locales != null);
assertTrue("Array available locales is 0-length",
(locales != null && locales.length != 0));
boolean found = false;
for (Locale l : locales) {
if (l.equals(Locale.US)) {
// expected
found = true;
}
}
assertTrue("At least locale " + Locale.US + " must be presented", found);
}
public void testGetWordInstanceLocale() {
BreakIterator it1 = BreakIterator.getWordInstance(Locale.CANADA_FRENCH);
assertTrue("Incorrect BreakIterator", it1 != BreakIterator.getWordInstance());
BreakIterator it2 = BreakIterator.getWordInstance(new Locale("bad locale"));
assertTrue("Incorrect BreakIterator", it2 != BreakIterator.getWordInstance());
}
// http://b/7307154 - we used to pin an unbounded number of char[]s, relying on finalization.
public void testStress() throws Exception {
char[] cs = { 'a' };
for (int i = 0; i < 4096; ++i) {
BreakIterator it = BreakIterator.getWordInstance(Locale.US);
it.setText(new String(cs));
}
}
public void testWordBoundaries() {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < 1024; ++i) {
if (i > 0) {
sb.append(' ');
}
sb.append("12345");
}
String s = sb.toString();
BreakIterator it = BreakIterator.getWordInstance(Locale.US);
it.setText(s);
// Check we're not leaking global references. 2048 would bust the VM's hard-coded limit.
for (int i = 0; i < 2048; ++i) {
it.setText(s);
}
BreakIterator clone = (BreakIterator) it.clone();
assertExpectedWordBoundaries(it, s);
assertExpectedWordBoundaries(clone, s);
}
private void assertExpectedWordBoundaries(BreakIterator it, String s) {
int expectedPos = 0;
int pos = it.first();
assertEquals(expectedPos, pos);
while (pos != BreakIterator.DONE) {
expectedPos += 5; // The five characters until the end of this word.
pos = it.next();
assertEquals(expectedPos, pos);
expectedPos += 1; // The space before the start of the next word...
if (expectedPos > s.length()) {
expectedPos = BreakIterator.DONE; // ...unless we're done.
}
pos = it.next();
assertEquals(expectedPos, pos);
}
}
public void testIsBoundary() {
BreakIterator it = BreakIterator.getCharacterInstance(Locale.US);
it.setText("hello");
try {
it.isBoundary(-1);
fail();
} catch (IllegalArgumentException expected) {
// Note that this exception is not listed in the Java API documentation
}
assertTrue(it.isBoundary(0));
assertTrue(it.isBoundary(1));
assertTrue(it.isBoundary(4));
assertTrue(it.isBoundary(5));
try {
it.isBoundary(6);
fail();
} catch (IllegalArgumentException expected) {
// Note that this exception is not listed in the Java API documentation
}
}
public void testFollowing() {
BreakIterator it = BreakIterator.getCharacterInstance(Locale.US);
it.setText("hello");
try {
it.following(-1);
fail();
} catch (IllegalArgumentException expected) {
// Expected exception
}
assertEquals(1, it.following(0));
assertEquals(2, it.following(1));
assertEquals(5, it.following(4));
assertEquals(BreakIterator.DONE, it.following(5));
try {
it.following(6);
fail();
} catch (IllegalArgumentException expected) {
// Expected exception
}
}
public void testPreceding() {
BreakIterator it = BreakIterator.getCharacterInstance(Locale.US);
it.setText("hello");
try {
it.preceding(-1);
fail();
} catch (IllegalArgumentException expected) {
// Expected exception
}
assertEquals(BreakIterator.DONE, it.preceding(0));
assertEquals(0, it.preceding(1));
assertEquals(4, it.preceding(5));
try {
it.preceding(6);
fail();
} catch (IllegalArgumentException expected) {
// Expected exception
}
}
}
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