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/*
* Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.text.CollationElementIterator;
import java.text.CollationKey;
import java.text.Collator;
import java.text.DecimalFormatSymbols;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.Locale;
/**
* TestUtils provides utility methods used by i18n related tests.
* This class was developed to help testing for internationalization &
* localization and is not versatile. This class is split into the following sections,
* 1) Methods to get a locale-dependent attribute.
* For example,
* - whether a non-Gregorian calendar is used
* - whether non-ASCII digits are used
* 2) Methods that help Collator related tests
* For example,
* - compare CollationElementIterators
* - test the expected relation key result for a Collator
*/
public final class TestUtils {
// Utility class should not be instantiated
private TestUtils() {}
/*
* The below methods are utilities for getting locale-dependent attributes.
*/
/**
* Returns true if the give locale uses Gregorian calendar.
*/
public static boolean usesGregorianCalendar(Locale locale) {
return Calendar.getInstance(locale).getClass() == GregorianCalendar.class;
}
/**
* Returns true if the given locale uses ASCII digits.
*/
public static boolean usesAsciiDigits(Locale locale) {
return DecimalFormatSymbols.getInstance(locale).getZeroDigit() == '0';
}
/**
* Returns true if the given locale has a special variant which is treated
* as ill-formed in BCP 47.
* BCP 47 requires a variant subtag to be 5 to 8 alphanumerics or a
* single numeric followed by 3 alphanumerics.
* However, note that this methods doesn't check a variant so rigorously
* because this is a utility method for testing. Intended special variants
* are: JP, NY, and TH, which can be commonly provided by
* Locale.getAvailableLocales().
*
*/
public static boolean hasSpecialVariant(Locale locale) {
String variant = locale.getVariant();
return !variant.isEmpty()
&& "JP".equals(variant) || "NY".equals(variant) || "TH".equals(variant);
}
/*
* The below methods are utilities specific to the Collation tests
*/
/**
* Compares two CollationElementIterators and throws an exception
* with a message detailing which collation elements were not equal
*/
public static void compareCollationElementIters(CollationElementIterator i1, CollationElementIterator i2) {
int c1, c2, count = 0;
do {
c1 = i1.next();
c2 = i2.next();
if (c1 != c2) {
throw new RuntimeException(" " + count + ": " + c1 + " != " + c2);
}
count++;
} while (c1 != CollationElementIterator.NULLORDER);
}
// Replace non-printable characters with unicode escapes
public static String prettify(String str) {
StringBuilder result = new StringBuilder();
String zero = "0000";
for (int i = 0; i < str.length(); i++) {
char ch = str.charAt(i);
if (ch < 0x09 || (ch > 0x0A && ch < 0x20)|| (ch > 0x7E && ch < 0xA0) || ch > 0x100) {
String hex = Integer.toString((int)ch,16);
result.append("\\u").append(zero.substring(0, 4 - hex.length())).append(hex);
} else {
result.append(ch);
}
}
return result.toString();
}
// Produce a printable representation of a CollationKey
public static String prettifyCKey(CollationKey key) {
StringBuilder result = new StringBuilder();
byte[] bytes = key.toByteArray();
for (int i = 0; i < bytes.length; i += 2) {
int val = (bytes[i] << 8) + bytes[i+1];
result.append(Integer.toString(val, 16)).append(" ");
}
return result.toString();
}
/**
* Utility to test a collator with an array of test values.
* See the other doTest() method for specific comparison details.
*/
public static void doCollatorTest(Collator col, int strength,
String[] source, String[] target, int[] result) {
if (source.length != target.length) {
throw new RuntimeException("Data size mismatch: source = " +
source.length + ", target = " + target.length);
}
if (source.length != result.length) {
throw new RuntimeException("Data size mismatch: source & target = " +
source.length + ", result = " + result.length);
}
col.setStrength(strength);
for (int i = 0; i < source.length ; i++) {
doCollatorTest(col, source[i], target[i], result[i]);
}
}
/**
* Test that a collator returns the correct relation result value when
* comparing a source and target string. Also tests that the compare and collation
* key results return the same value.
*/
public static void doCollatorTest(Collator col,
String source, String target, int result) {
char relation = '=';
if (result <= -1) {
relation = '<';
} else if (result >= 1) {
relation = '>';
}
int compareResult = col.compare(source, target);
CollationKey sortKey1 = col.getCollationKey(source);
CollationKey sortKey2 = col.getCollationKey(target);
int keyResult = sortKey1.compareTo(sortKey2);
if (compareResult != keyResult) {
throw new RuntimeException("Compare and Collation Key results are different! Source = " +
source + " Target = " + target);
}
if (keyResult != result) {
throw new RuntimeException("Collation Test failed! Source = " + source + " Target = " +
target + " result should be " + relation);
}
}
}
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