/*
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*
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*
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* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
/*
* @test
* @bug 4062985 4108758 4108762 4157299
* @library /java/text/testlib
* @summary Test CollationElementIterator, particularly the new methods in 1.2
*/
/*
* (C) Copyright IBM Corp. 1998 - All Rights Reserved
*
* The original version of this source code and documentation is copyrighted
* and owned by IBM, Inc. These materials are provided under terms of a
* License Agreement between IBM and Sun. This technology is protected by
* multiple US and International patents. This notice and attribution to IBM
* may not be removed.
*/
import java.util.Locale;
import java.text.*;
public class IteratorTest extends CollatorTest {
// TODO:
// - Test previous() with contracting character sequences, which don't work
// at the moment.
// - Test edge cases on setOffset(), e.g. offset > length, etc.
//
public static void main(String[] args) throws Exception {
new IteratorTest().run(args);
}
/**
* Test for CollationElementIterator.previous()
*
* @bug 4108758 - Make sure it works with contracting characters
*
*/
public void TestPrevious() throws ParseException {
// A basic test to see if it's working at all
backAndForth(en_us.getCollationElementIterator(test1));
// Test with a contracting character sequence
RuleBasedCollator c1 = new RuleBasedCollator(
"< a,A < b,B < c,C, d,D < z,Z < ch,cH,Ch,CH" );
backAndForth(c1.getCollationElementIterator("abchdcba"));
// Test with an expanding character sequence
RuleBasedCollator c2 = new RuleBasedCollator(
"< a < b < c/abd < d" );
backAndForth(c2.getCollationElementIterator("abcd"));
// Now try both
RuleBasedCollator c3 = new RuleBasedCollator(
"< a < b < c/aba < d < z < ch" );
backAndForth(c3.getCollationElementIterator("abcdbchdc"));
}
/**
* Test for getOffset() and setOffset()
*/
public void TestOffset() {
CollationElementIterator iter = en_us.getCollationElementIterator(test1);
// Run all the way through the iterator, then get the offset
int orders[] = getOrders(iter);
int offset = iter.getOffset();
if (offset != test1.length()) {
System.out.println("offset at end != length: "
+ offset + " vs " + test1.length());
}
// Now set the offset back to the beginning and see if it works
iter.setOffset(0);
assertEqual(iter, en_us.getCollationElementIterator(test1));
// TODO: try iterating halfway through a messy string.
}
/**
* Test for setText()
*/
public void TestSetText() {
CollationElementIterator iter1 = en_us.getCollationElementIterator(test1);
CollationElementIterator iter2 = en_us.getCollationElementIterator(test2);
// Run through the second iterator just to exercise it
int c = iter2.next();
int i = 0;
while ( ++i < 10 && c != CollationElementIterator.NULLORDER) {
c = iter2.next();
}
// Now set it to point to the same string as the first iterator
iter2.setText(test1);
assertEqual(iter1, iter2);
}
/** @bug 4108762
* Test for getMaxExpansion()
*/
public void TestMaxExpansion() throws ParseException {
// Try a simple one first:
// The only expansion ends with 'e' and has length 2
String[][] test1 = {
{ "< a & ae = \u00e4 < b < e", "" },
{ "a", "1" },
{ "b", "1" },
{ "e", "2" },
};
verifyExpansion(test1);
// Now a more complicated one:
// "a1" --> "ae"
// "z" --> "aeef"
//
String[][] test2 = {
{ "< a & ae = a1 & aeef = z < b < e < f", "" },
{ "a", "1" },
{ "b", "1" },
{ "e", "2" },
{ "f", "4" },
};
verifyExpansion(test2);
}
/*
* @bug 4157299
*/
public void TestClearBuffers() throws ParseException {
RuleBasedCollator c = new RuleBasedCollator("< a < b < c & ab = d");
CollationElementIterator i = c.getCollationElementIterator("abcd");
int e0 = i.next(); // save the first collation element
i.setOffset(3); // go to the expanding character
i.next(); // but only use up half of it
i.setOffset(0); // go back to the beginning
int e = i.next(); // and get this one again
if (e != e0) {
errln("got " + Integer.toString(e, 16) + ", expected " +
Integer.toString(e0, 16));
}
}
//------------------------------------------------------------------------
// Internal utilities
//
private void backAndForth(CollationElementIterator iter) {
// Run through the iterator forwards and stick it into an array
int [] orders = getOrders(iter);
// Now go through it backwards and make sure we get the same values
int index = orders.length;
int o;
while ((o = iter.previous()) != CollationElementIterator.NULLORDER) {
if (o != orders[--index]) {
errln("Mismatch at index " + index + ": "
+ orders[index] + " vs " + o);
break;
}
}
if (index != 0) {
errln("Didn't get back to beginning - index is " + index);
iter.reset();
err("next: ");
while ((o = iter.next()) != NULLORDER) {
err( Integer.toHexString(o) + " ");
}
errln("");
err("prev: ");
while ((o = iter.previous()) != NULLORDER) {
err( Integer.toHexString(o) + " ");
}
errln("");
}
}
/**
* Verify that getMaxExpansion works on a given set of collation rules
*
* The first row of the "tests" array contains the collation rules
* at index 0, and the string at index 1 is ignored.
*
* Subsequent rows of the array contain a character and a number, both
* represented as strings. The character's collation order is determined,
* and getMaxExpansion is called for that character. If its value is
* not equal to the specified number, an error results.
*/
private void verifyExpansion(String[][] tests) throws ParseException
{
RuleBasedCollator coll = new RuleBasedCollator(tests[0][0]);
CollationElementIterator iter = coll.getCollationElementIterator("");
for (int i = 1; i < tests.length; i++) {
// First get the collation key that the test string expands to
iter.setText(tests[i][0]);
int order = iter.next();
if (order == NULLORDER || iter.next() != NULLORDER) {
iter.reset();
errln("verifyExpansion: '" + tests[i][0] +
"' has multiple orders:" + orderString(iter));
}
int expansion = iter.getMaxExpansion(order);
int expect = new Integer(tests[i][1]).intValue();
if (expansion != expect) {
errln("expansion for '" + tests[i][0] + "' is wrong: " +
"expected " + expect + ", got " + expansion);
}
}
}
/**
* Return an integer array containing all of the collation orders
* returned by calls to next on the specified iterator
*/
private int[] getOrders(CollationElementIterator iter)
{
int maxSize = 100;
int size = 0;
int[] orders = new int[maxSize];
int order;
while ((order = iter.next()) != NULLORDER) {
if (size == maxSize) {
maxSize *= 2;
int[] temp = new int[maxSize];
System.arraycopy(orders, 0, temp, 0, size);
orders = temp;
}
orders[size++] = order;
}
if (orders.length > size) {
int[] temp = new int[size];
System.arraycopy(orders, 0, temp, 0, size);
orders = temp;
}
return orders;
};
/**
* Return a string containing all of the collation orders
* returned by calls to next on the specified iterator
*/
private String orderString(CollationElementIterator iter) {
StringBuffer buf = new StringBuffer();
int order;
while ((order = iter.next()) != NULLORDER) {
buf.append( Integer.toHexString(order) + " ");
}
return buf.toString();
}
static final private int NULLORDER = CollationElementIterator.NULLORDER;
RuleBasedCollator en_us = (RuleBasedCollator)Collator.getInstance(Locale.US);
String test1 = "What subset of all possible test cases?";
String test2 = "has the highest probability of detecting";
}