b859da9c54
Reviewed-by: naoto
298 lines
9.9 KiB
Java
298 lines
9.9 KiB
Java
/*
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* Copyright (c) 1998, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4062985 4108758 4108762 4157299
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* @library /java/text/testlib
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* @summary Test CollationElementIterator, particularly the new methods in 1.2
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* @run junit IteratorTest
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*/
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/*
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* (C) Copyright IBM Corp. 1998 - All Rights Reserved
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*
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* The original version of this source code and documentation is copyrighted
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* and owned by IBM, Inc. These materials are provided under terms of a
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* License Agreement between IBM and Sun. This technology is protected by
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* multiple US and International patents. This notice and attribution to IBM
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* may not be removed.
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*/
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import java.util.Locale;
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import java.text.*;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.fail;
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public class IteratorTest {
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// TODO:
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// - Test previous() with contracting character sequences, which don't work
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// at the moment.
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// - Test edge cases on setOffset(), e.g. offset > length, etc.
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//
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/**
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* Test for CollationElementIterator.previous()
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*
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* @bug 4108758 - Make sure it works with contracting characters
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*
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*/
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@Test
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public void TestPrevious() throws ParseException {
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// A basic test to see if it's working at all
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backAndForth(en_us.getCollationElementIterator(test1));
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// Test with a contracting character sequence
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RuleBasedCollator c1 = new RuleBasedCollator(
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"< a,A < b,B < c,C, d,D < z,Z < ch,cH,Ch,CH" );
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backAndForth(c1.getCollationElementIterator("abchdcba"));
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// Test with an expanding character sequence
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RuleBasedCollator c2 = new RuleBasedCollator(
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"< a < b < c/abd < d" );
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backAndForth(c2.getCollationElementIterator("abcd"));
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// Now try both
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RuleBasedCollator c3 = new RuleBasedCollator(
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"< a < b < c/aba < d < z < ch" );
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backAndForth(c3.getCollationElementIterator("abcdbchdc"));
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}
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/**
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* Test for getOffset() and setOffset()
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*/
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@Test
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public void TestOffset() {
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CollationElementIterator iter = en_us.getCollationElementIterator(test1);
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// Run all the way through the iterator, then get the offset
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int orders[] = getOrders(iter);
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int offset = iter.getOffset();
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if (offset != test1.length()) {
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System.out.println("offset at end != length: "
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+ offset + " vs " + test1.length());
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}
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// Now set the offset back to the beginning and see if it works
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iter.setOffset(0);
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TestUtils.compareCollationElementIters(iter, en_us.getCollationElementIterator(test1));
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// TODO: try iterating halfway through a messy string.
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}
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/**
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* Test for setText()
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*/
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@Test
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public void TestSetText() {
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CollationElementIterator iter1 = en_us.getCollationElementIterator(test1);
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CollationElementIterator iter2 = en_us.getCollationElementIterator(test2);
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// Run through the second iterator just to exercise it
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int c = iter2.next();
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int i = 0;
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while ( ++i < 10 && c != CollationElementIterator.NULLORDER) {
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c = iter2.next();
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}
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// Now set it to point to the same string as the first iterator
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iter2.setText(test1);
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TestUtils.compareCollationElementIters(iter1, iter2);
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}
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/** @bug 4108762
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* Test for getMaxExpansion()
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*/
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@Test
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public void TestMaxExpansion() throws ParseException {
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// Try a simple one first:
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// The only expansion ends with 'e' and has length 2
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String[][] test1 = {
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{ "< a & ae = \u00e4 < b < e", "" },
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{ "a", "1" },
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{ "b", "1" },
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{ "e", "2" },
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};
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verifyExpansion(test1);
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// Now a more complicated one:
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// "a1" --> "ae"
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// "z" --> "aeef"
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//
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String[][] test2 = {
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{ "< a & ae = a1 & aeef = z < b < e < f", "" },
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{ "a", "1" },
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{ "b", "1" },
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{ "e", "2" },
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{ "f", "4" },
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};
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verifyExpansion(test2);
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}
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/*
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* @bug 4157299
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*/
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@Test
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public void TestClearBuffers() throws ParseException {
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RuleBasedCollator c = new RuleBasedCollator("< a < b < c & ab = d");
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CollationElementIterator i = c.getCollationElementIterator("abcd");
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int e0 = i.next(); // save the first collation element
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i.setOffset(3); // go to the expanding character
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i.next(); // but only use up half of it
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i.setOffset(0); // go back to the beginning
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int e = i.next(); // and get this one again
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if (e != e0) {
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fail("got " + Integer.toString(e, 16) + ", expected " +
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Integer.toString(e0, 16));
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}
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}
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//------------------------------------------------------------------------
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// Internal utilities
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//
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private void backAndForth(CollationElementIterator iter) {
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// Run through the iterator forwards and stick it into an array
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int [] orders = getOrders(iter);
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// Now go through it backwards and make sure we get the same values
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int index = orders.length;
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int o;
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while ((o = iter.previous()) != CollationElementIterator.NULLORDER) {
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if (o != orders[--index]) {
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fail("Mismatch at index " + index + ": "
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+ orders[index] + " vs " + o);
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break;
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}
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}
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if (index != 0) {
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fail("Didn't get back to beginning - index is " + index);
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iter.reset();
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fail("next: ");
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while ((o = iter.next()) != NULLORDER) {
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fail( Integer.toHexString(o) + " ");
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}
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fail("");
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fail("prev: ");
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while ((o = iter.previous()) != NULLORDER) {
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fail( Integer.toHexString(o) + " ");
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}
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fail("");
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}
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}
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/**
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* Verify that getMaxExpansion works on a given set of collation rules
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*
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* The first row of the "tests" array contains the collation rules
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* at index 0, and the string at index 1 is ignored.
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*
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* Subsequent rows of the array contain a character and a number, both
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* represented as strings. The character's collation order is determined,
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* and getMaxExpansion is called for that character. If its value is
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* not equal to the specified number, an error results.
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*/
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private void verifyExpansion(String[][] tests) throws ParseException
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{
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RuleBasedCollator coll = new RuleBasedCollator(tests[0][0]);
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CollationElementIterator iter = coll.getCollationElementIterator("");
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for (int i = 1; i < tests.length; i++) {
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// First get the collation key that the test string expands to
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iter.setText(tests[i][0]);
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int order = iter.next();
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if (order == NULLORDER || iter.next() != NULLORDER) {
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iter.reset();
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fail("verifyExpansion: '" + tests[i][0] +
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"' has multiple orders:" + orderString(iter));
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}
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int expansion = iter.getMaxExpansion(order);
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int expect = new Integer(tests[i][1]).intValue();
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if (expansion != expect) {
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fail("expansion for '" + tests[i][0] + "' is wrong: " +
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"expected " + expect + ", got " + expansion);
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}
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}
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}
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/**
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* Return an integer array containing all of the collation orders
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* returned by calls to next on the specified iterator
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*/
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private int[] getOrders(CollationElementIterator iter)
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{
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int maxSize = 100;
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int size = 0;
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int[] orders = new int[maxSize];
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int order;
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while ((order = iter.next()) != NULLORDER) {
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if (size == maxSize) {
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maxSize *= 2;
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int[] temp = new int[maxSize];
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System.arraycopy(orders, 0, temp, 0, size);
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orders = temp;
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}
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orders[size++] = order;
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}
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if (orders.length > size) {
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int[] temp = new int[size];
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System.arraycopy(orders, 0, temp, 0, size);
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orders = temp;
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}
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return orders;
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};
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/**
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* Return a string containing all of the collation orders
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* returned by calls to next on the specified iterator
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*/
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private String orderString(CollationElementIterator iter) {
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StringBuffer buf = new StringBuffer();
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int order;
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while ((order = iter.next()) != NULLORDER) {
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buf.append( Integer.toHexString(order) + " ");
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}
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return buf.toString();
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}
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static final private int NULLORDER = CollationElementIterator.NULLORDER;
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RuleBasedCollator en_us = (RuleBasedCollator)Collator.getInstance(Locale.US);
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String test1 = "What subset of all possible test cases?";
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String test2 = "has the highest probability of detecting";
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}
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