public void TestCollation()
{
using (new ThreadCultureChange(_DEFAULT_LOCALE, _DEFAULT_LOCALE))
{
for (int i = 0; i < _LOCALE_NUMBER; i++)
{
UCultureInfo oldLoc = _LOCALES[i][0];
UCultureInfo newLoc = _LOCALES[i][1];
if (!availableMap.TryGetValue(_LOCALES[i][1], out object value) || value == null)
{
Logln(_LOCALES[i][1] + " is not available. Skipping!");
continue;
}
Collator c1 = Collator.GetInstance(oldLoc);
Collator c2 = Collator.GetInstance(newLoc);
if (!c1.Equals(c2))
{
Errln("CollationTest: c1!=c2: newLoc= " + newLoc + " oldLoc= " + oldLoc);
}
Logln("Collation old:" + oldLoc + " new:" + newLoc);
}
}
}
public static int CompareStringsUnicode(string a, string b)
{
Collator c = Collator.GetInstance();
int res = c.Compare(a, b);
return(res);
}
public void TestCollation()
{
ULocale defLoc = ULocale.GetDefault();
ULocale.SetDefault(_DEFAULT_LOCALE);
for (int i = 0; i < _LOCALE_NUMBER; i++)
{
ULocale oldLoc = _LOCALES[i][0];
ULocale newLoc = _LOCALES[i][1];
if (availableMap.Get(_LOCALES[i][1]) == null)
{
Logln(_LOCALES[i][1] + " is not available. Skipping!");
continue;
}
Collator c1 = Collator.GetInstance(oldLoc);
Collator c2 = Collator.GetInstance(newLoc);
if (!c1.Equals(c2))
{
Errln("CollationTest: c1!=c2: newLoc= " + newLoc + " oldLoc= " + oldLoc);
}
Logln("Collation old:" + oldLoc + " new:" + newLoc);
}
ULocale.SetDefault(defLoc);
}
public void TestCustomRules()
{
RuleBasedCollator baseCollator = (RuleBasedCollator)Collator.GetInstance(new ULocale("de_DE"));
String DIN5007_2_tailorings =
"& ae , a\u0308 & AE , A\u0308" +
"& oe , o\u0308 & OE , O\u0308" +
"& ue , u\u0308 & UE , u\u0308";
RuleBasedCollator tailoredCollator = new RuleBasedCollator(baseCollator.GetRules() + DIN5007_2_tailorings);
string tailoredRules = tailoredCollator.GetRules();
//
// at this point, you would save these tailoredRules to a file,
// and use the custom parameter.
//
String germanUmlaut = "Töne";
String germanOE = "Toene";
IDictionary <String, String> args = new Dictionary <String, String>();
args.Put("custom", "rules.txt");
args.Put("strength", "primary");
ICUCollationKeyFilterFactory factory = new ICUCollationKeyFilterFactory(args);
factory.Inform(new StringMockResourceLoader(tailoredRules));
TokenStream tsUmlaut = factory.Create(
new KeywordTokenizer(new StringReader(germanUmlaut)));
TokenStream tsOE = factory.Create(
new KeywordTokenizer(new StringReader(germanOE)));
assertCollatesToSame(tsUmlaut, tsOE);
}
public void TestDemo3()
{
// Logln("Demo Test 3 : Create a new table collation with rules \"& Question'-'mark ; '?' & Hash'-'mark ; '#' & Ampersand ; '&'\"");
Collator col = Collator.GetInstance(new CultureInfo("en") /* Locale.ENGLISH */);
String baseRules = ((RuleBasedCollator)col).GetRules();
String newRules = "& Question'-'mark ; '?' & Hash'-'mark ; '#' & Ampersand ; '&'";
newRules = baseRules + newRules;
RuleBasedCollator myCollation = null;
try
{
myCollation = new RuleBasedCollator(newRules);
}
catch (Exception e)
{
Errln("Fail to create RuleBasedCollator with rules:" + newRules);
return;
}
int j, n;
for (j = 0; j < TOTALTESTSET; j++)
{
for (n = j + 1; n < TOTALTESTSET; n++)
{
DoTest(myCollation, testCases[results[10][j]], testCases[results[10][n]], -1);
}
}
}
public void TestIllformedLocale()
{
UCultureInfo french = new UCultureInfo("fr");
Collator collator = Collator.GetInstance(french);
CultureDisplayNames names = CultureDisplayNames.GetInstance(french,
new DisplayContextOptions {
Capitalization = Capitalization.UIListOrMenu
});
foreach (String malformed in new string[] { "en-a", "$", "ü--a", "en--US" })
{
try
{
ISet <UCultureInfo> supported = new HashSet <UCultureInfo> {
new UCultureInfo(malformed)
}; //Collections.singleton(new UCultureInfo(malformed));
names.GetUiList(supported, false, collator);
assertNull("Failed to detect bogus locale «" + malformed + "»", supported);
}
catch (IllformedLocaleException e)
{
Logln("Successfully detected ill-formed locale «" + malformed + "»:" + e.ToString());
}
}
}
public void TestThreads()
{
Collator theCollator = Collator.GetInstance(new CultureInfo("pl"));
Random r = new Random();
Control control = new Control();
Thread[] threads = new Thread[10];
for (int i = 0; i < threads.Length; ++i)
{
Collator coll;
//try
//{
coll = (Collator)theCollator.Clone();
//}
//catch (CloneNotSupportedException e)
//{
// // should not happen, if it does we'll get an exception right away
// Errln("could not clone");
// return;
//}
Test test = new Test("Collation test thread" + i, (string[])threadTestData.Clone(), coll,
r, control);
threads[i] = new Thread(() => test.Run());
}
RunThreads(threads, control);
}
public void TestDemo2()
{
Logln("Demo Test 2 : Create a new table collation with rules \"& C < ch , cH, Ch, CH\"");
Collator col = Collator.GetInstance(new CultureInfo("en") /* Locale.ENGLISH */);
String baseRules = ((RuleBasedCollator)col).GetRules();
String newRules = "& C < ch , cH, Ch, CH";
newRules = baseRules + newRules;
RuleBasedCollator myCollation = null;
try
{
myCollation = new RuleBasedCollator(newRules);
}
catch (Exception e)
{
Errln("Fail to create RuleBasedCollator with rules:" + newRules);
return;
}
int j, n;
for (j = 0; j < TOTALTESTSET; j++)
{
for (n = j + 1; n < TOTALTESTSET; n++)
{
DoTest(myCollation, testCases[results[9][j]], testCases[results[9][n]], -1);
}
}
}
public void init()
{
if (myCollation == null)
{
myCollation = Collator.GetInstance(new CultureInfo("ja") /* Locale.JAPANESE */);
}
}
public void Init()
{
myCollation = Collator.GetInstance(new CultureInfo("de") /* Locale.GERMAN */);
if (myCollation == null)
{
Errln("ERROR: in creation of collator of GERMAN locale");
}
}
public void TestNormalizedUnicodeChar()
{
// thai should have normalization on
RuleBasedCollator th_th = null;
try
{
th_th = (RuleBasedCollator)Collator.GetInstance(
new CultureInfo("th-TH"));
}
catch (Exception e)
{
Warnln("Error creating Thai collator");
return;
}
StringBuffer source = new StringBuffer();
source.Append('\uFDFA');
CollationElementIterator iter
= th_th.GetCollationElementIterator(source.ToString());
CollationTest.BackAndForth(this, iter);
for (char codepoint = (char)0x1; codepoint < 0xfffe;)
{
source.Delete(0, source.Length);
while (codepoint % 0xFF != 0)
{
if (UChar.IsDefined(codepoint))
{
source.Append(codepoint);
}
codepoint++;
}
if (UChar.IsDefined(codepoint))
{
source.Append(codepoint);
}
if (codepoint != 0xFFFF)
{
codepoint++;
}
/*if (((int)codepoint) >= 0xfe00) {
* String str = source.substring(185, 190);
* System.out.println(com.ibm.icu.impl.Utility.escape(str));
* System.out.println("codepoint "
+ Integer.toHexString(codepoint)
+ "length " + str.Length);
+ iter = th_th.GetCollationElementIterator(str);
+ CollationTest.BackAndForth(this, iter);
*/
iter = th_th.GetCollationElementIterator(source.ToString());
// A basic test to see if it's working at all
CollationTest.BackAndForth(this, iter);
}
}
public void TestAddICUCollationDocValuesField()
{
ICUCollationDocValuesField field = null;
Collator collator = Collator.GetInstance(new CultureInfo("en"));
AssertDocumentExtensionAddsToDocument(document => field = document.AddICUCollationDocValuesField("theName", collator));
Assert.AreEqual("theName", field.Name);
Assert.AreEqual(collator, field.collator); // Collator is cloned, so we don't expect them to be the same instance
}
// private methods -----------------------------------------------------
private static RuleBasedCollator GetThaiCollator()
{
if (m_collator_ == null)
{
m_collator_ = (RuleBasedCollator)Collator.GetInstance(
new CultureInfo("th-TH"));
}
return(m_collator_);
}
public void TestRules()
{
String[] testSourceCases =
{
"\u0061\u0062\u007a",
"\u0061\u0062\u007a",
};
String[] testTargetCases =
{
"\u0061\u0062\u00e4",
"\u0061\u0062\u0061\u0308",
};
int i = 0;
Logln("Demo Test 1 : Create a new table collation with rules \"& z < 0x00e4\"");
Collator col = Collator.GetInstance(new CultureInfo("en-US"));
String baseRules = ((RuleBasedCollator)col).GetRules();
String newRules = " & z < ";
newRules = baseRules + newRules + (0x00e4).ToString(CultureInfo.InvariantCulture);
RuleBasedCollator myCollation = null;
try
{
myCollation = new RuleBasedCollator(newRules);
}
catch (Exception e)
{
Warnln("Demo Test 1 Table Collation object creation failed.");
return;
}
for (i = 0; i < 2; i++)
{
doTest(myCollation, testSourceCases[i], testTargetCases[i], -1);
}
Logln("Demo Test 2 : Create a new table collation with rules \"& z < a 0x0308\"");
newRules = "";
newRules = baseRules + " & z < a" + (0x0308).ToString(CultureInfo.InvariantCulture);
try
{
myCollation = new RuleBasedCollator(newRules);
}
catch (Exception e)
{
Errln("Demo Test 1 Table Collation object creation failed.");
return;
}
for (i = 0; i < 2; i++)
{
doTest(myCollation, testSourceCases[i], testTargetCases[i], -1);
}
}
public void TestThreadSafe()
{
int iters = 20 * RandomMultiplier;
for (int i = 0; i < iters; i++)
{
CultureInfo locale = new CultureInfo("de");
Collator collator = Collator.GetInstance(locale);
collator.Strength = CollationStrength.Identical;
AssertThreadSafe(new ICUCollationKeyAnalyzer(TEST_VERSION_CURRENT, collator));
}
}
public void TestCollator()
{
CheckService("ja_JP_YOKOHAMA", new ServiceFacade(create: (req) =>
{
return(Collator.GetInstance(req));
}), null, new Registrar(register: (loc, prototype) =>
{
return(Collator.RegisterInstance((Collator)prototype, loc));
}, unregister: (key) =>
{
return(Collator.Unregister(key));
}));
}
public void TestRanges()
{
Directory dir = NewDirectory();
RandomIndexWriter iw = new RandomIndexWriter(
#if FEATURE_INSTANCE_TESTDATA_INITIALIZATION
this,
#endif
Random, dir);
Document doc = new Document();
Field field = NewField("field", "", StringField.TYPE_STORED);
Collator collator = Collator.GetInstance(CultureInfo.CurrentCulture); // uses -Dtests.locale
if (Random.nextBoolean())
{
collator.Strength = CollationStrength.Primary;
}
ICUCollationDocValuesField collationField = new ICUCollationDocValuesField("collated", collator);
doc.Add(field);
doc.Add(collationField);
int numDocs = AtLeast(500);
for (int i = 0; i < numDocs; i++)
{
String value = TestUtil.RandomSimpleString(Random);
field.SetStringValue(value);
collationField.SetStringValue(value);
iw.AddDocument(doc);
}
IndexReader ir = iw.GetReader();
iw.Dispose();
IndexSearcher @is = NewSearcher(ir);
int numChecks = AtLeast(100);
for (int i = 0; i < numChecks; i++)
{
String start = TestUtil.RandomSimpleString(Random);
String end = TestUtil.RandomSimpleString(Random);
BytesRef lowerVal = new BytesRef(collator.GetCollationKey(start).ToByteArray());
BytesRef upperVal = new BytesRef(collator.GetCollationKey(end).ToByteArray());
Query query = new ConstantScoreQuery(FieldCacheRangeFilter.NewBytesRefRange("collated", lowerVal, upperVal, true, true));
DoTestRanges(@is, start, end, query, collator);
}
ir.Dispose();
dir.Dispose();
}
public void TestUnicodeChar()
{
RuleBasedCollator en_us = (RuleBasedCollator)Collator.GetInstance(new CultureInfo("en-US"));
CollationElementIterator iter;
char codepoint;
StringBuffer source = new StringBuffer();
source.Append("\u0e4d\u0e4e\u0e4f");
// source.append("\u04e8\u04e9");
iter = en_us.GetCollationElementIterator(source.ToString());
// A basic test to see if it's working at all
CollationTest.BackAndForth(this, iter);
for (codepoint = (char)1; codepoint < 0xFFFE;)
{
source.Delete(0, source.Length);
while (codepoint % 0xFF != 0)
{
if (UChar.IsDefined(codepoint))
{
source.Append(codepoint);
}
codepoint++;
}
if (UChar.IsDefined(codepoint))
{
source.Append(codepoint);
}
if (codepoint != 0xFFFF)
{
codepoint++;
}
/*if (codepoint >= 0x04fc) {
* System.out.println("codepoint " + Integer.toHexString(codepoint));
* String str = source.substring(230, 232);
* System.out.println(com.ibm.icu.impl.Utility.escape(str));
* System.out.println("codepoint " + Integer.toHexString(codepoint)
+ "length " + str.Length);
+ iter = en_us.GetCollationElementIterator(str);
+ CollationTest.BackAndForth(this, iter);
+ }
*/
iter = en_us.GetCollationElementIterator(source.ToString());
// A basic test to see if it's working at all
CollationTest.BackAndForth(this, iter);
}
}
public void TestRuleVsLocaleCreationMonkey()
{
//create a RBC from a collator reader by reading in a locale collation file
//also create one simply from a rules string (which should be
//pulled from the locale collation file)
//and then do crazy monkey testing on it to make sure they are the same.
int x, y, z;
Random r = CreateRandom();
String randString1;
CollationKey key1;
CollationKey key2;
CultureInfo[] locales = Collator.GetAvailableLocales();
RuleBasedCollator localeCollator;
RuleBasedCollator ruleCollator;
for (z = 0; z < 60; z++)
{
x = r.Next(locales.Length);
CultureInfo locale = locales[x];
try
{
//this is making the assumption that the only type of collator that will be made is RBC
localeCollator = (RuleBasedCollator)Collator.GetInstance(locale);
Logln("Rules for " + locale + " are: " + localeCollator.GetRules());
ruleCollator = new RuleBasedCollator(localeCollator.GetRules());
}
catch (Exception e)
{
Warnln("ERROR: in creation of collator of locale " + locale.DisplayName + ": " + e);
return;
}
//do it several times for each collator
int n = 3;
for (y = 0; y < n; y++)
{
randString1 = GenerateNewString(r);
key1 = localeCollator.GetCollationKey(randString1);
key2 = ruleCollator.GetCollationKey(randString1);
Report(locale.DisplayName, randString1, key1, key2);
}
}
}
public void TestCollationKeySort()
{
Analyzer usAnalyzer = new TestAnalyzer(Collator.GetInstance(new CultureInfo("en-us")));
Analyzer franceAnalyzer
= new TestAnalyzer(Collator.GetInstance(new CultureInfo("fr")));
Analyzer swedenAnalyzer
= new TestAnalyzer(Collator.GetInstance(new CultureInfo("sv-se")));
Analyzer denmarkAnalyzer
= new TestAnalyzer(Collator.GetInstance(new CultureInfo("da-dk")));
// The ICU Collator and java.text.Collator implementations differ in their
// orderings - "BFJHD" is the ordering for the ICU Collator for Locale.US.
TestCollationKeySort
(usAnalyzer, franceAnalyzer, swedenAnalyzer, denmarkAnalyzer,
"BFJHD", "ECAGI", "BJDFH", "BJDHF");
}
public void TestJB581()
{
String source = "THISISATEST.";
String target = "Thisisatest.";
Collator coll = null;
try
{
coll = Collator.GetInstance(new CultureInfo("en") /*Locale.ENGLISH*/);
}
catch (Exception e)
{
Errln("ERROR: Failed to create the collator for : en_US\n");
return;
}
int result = coll.Compare(source, target);
// result is 1, secondary differences only for ignorable space characters
if (result != 1)
{
Errln("Comparing two strings with only secondary differences in C failed.\n");
return;
}
// To compare them with just primary differences
coll.Strength = (Collator.PRIMARY);
result = coll.Compare(source, target);
// result is 0
if (result != 0)
{
Errln("Comparing two strings with no differences in C failed.\n");
return;
}
// Now, do the same comparison with keys
CollationKey sourceKeyOut, targetKeyOut;
sourceKeyOut = coll.GetCollationKey(source);
targetKeyOut = coll.GetCollationKey(target);
result = sourceKeyOut.CompareTo(targetKeyOut);
if (result != 0)
{
Errln("Comparing two strings with sort keys in C failed.\n");
return;
}
}
internal static Analyzer CreateAnalyzer(CultureInfo locale, Implementation impl)
{
// LUCENENET specific - senseless to use reflection here because we only have one
// collator.
object collator = Collator.GetInstance(locale);
// LUCENENET TODO: The .NET equivalent to create a collator like the one in the JDK is:
//CompareInfo.GetCompareInfo(locale.Name);
Type clazz = impl.GetAnalyzerType();
return((Analyzer)Activator.CreateInstance(clazz,
#pragma warning disable 612, 618
LuceneVersion.LUCENE_CURRENT,
#pragma warning restore 612, 618
collator));
}
public void TestFrozen()
{
Collator theCollator = Collator.GetInstance(new CultureInfo("pl"));
theCollator.Freeze();
Random r = new Random();
Control control = new Control();
Thread[] threads = new Thread[10];
for (int i = 0; i < threads.Length; ++i)
{
Test test = new Test("Frozen collation test thread " + i, (string[])threadTestData.Clone(), theCollator,
r, control);
threads[i] = new Thread(() => test.Run());
}
RunThreads(threads, control);
}
public override void Run(EPServiceProvider epService)
{
epService.EPAdministrator.Configuration.AddEventType("SupportBean", typeof(SupportBean));
string frenchForSin = "p\u00E9ch\u00E9";
string frenchForFruit = "p\u00EAche";
string[] sortedFrench = new string[] {
frenchForFruit,
frenchForSin
};
// CurrentCulture cannot be assigned in .NET 4.5 and below
#if NET46 || NET47 || NETSTANDARD2_0
var englishUS = CultureInfo.GetCultureInfo("en-US");
var englishUSComparer = StringComparer.Create(englishUS, false);
CultureInfo.CurrentCulture = englishUS;
var french = CultureInfo.GetCultureInfo("fr-FR");
var frenchComparer = StringComparer.Create(french, false);
Assert.AreEqual(1, frenchForFruit.CompareTo(frenchForSin));
Assert.AreEqual(-1, frenchForSin.CompareTo(frenchForFruit));
CultureInfo.CurrentCulture = french;
#if FALSE
Assert.AreEqual(1, frenchForFruit.CompareTo(frenchForSin));
Assert.AreEqual(-1, frenchComparer.Compare(frenchForFruit, frenchForSin));
Assert.AreEqual(-1, frenchForSin.CompareTo(frenchForFruit));
Assert.AreEqual(1, frenchComparer.Compare(frenchForSin, frenchForFruit));
Assert.IsFalse(frenchForSin.Equals(frenchForFruit));
Collections.Sort(items);
Log.Info("Sorted default" + items);
Collections.Sort(items, new ProxyComparator <string>()
{
Collator collator = Collator.GetInstance(Locale.FRANCE);
public void TestIllformedLocale()
{
ULocale french = ULocale.FRENCH;
Collator collator = Collator.GetInstance(french);
LocaleDisplayNames names = LocaleDisplayNames.GetInstance(french,
DisplayContext.CapitalizationForUIListOrMenu);
foreach (String malformed in new string[] { "en-a", "$", "ü--a", "en--US" })
{
try
{
ISet <ULocale> supported = ImmutableHashSet.Create(new ULocale(malformed)); //Collections.singleton(new ULocale(malformed));
names.GetUiList(supported, false, collator);
assertNull("Failed to detect bogus locale «" + malformed + "»", supported);
}
catch (IllformedLocaleException e)
{
Logln("Successfully detected ill-formed locale «" + malformed + "»:" + e.ToString());
}
}
}
public void TestG7Data()
{
CultureInfo[] locales =
{
new CultureInfo("en-US") /* Locale.US */,
new CultureInfo("en-GB") /* Locale.UK */,
new CultureInfo("en-CA") /* Locale.CANADA */,
new CultureInfo("fr-FR") /* Locale.FRANCE */,
new CultureInfo("fr-CA") /* Locale.CANADA_FRENCH */,
new CultureInfo("de-DE") /* Locale.GERMANY */,
new CultureInfo("ja-JP") /* Locale.JAPAN */,
new CultureInfo("it-IT") /* Locale.ITALY */
};
int i = 0, j = 0;
for (i = 0; i < locales.Length; i++)
{
Collator myCollation = null;
RuleBasedCollator tblColl1 = null;
try
{
myCollation = Collator.GetInstance(locales[i]);
tblColl1 = new RuleBasedCollator(((RuleBasedCollator)myCollation).GetRules());
}
catch (Exception foo)
{
Warnln("Exception: " + foo.Message +
"; Locale : " + locales[i].DisplayName + " getRules failed");
continue;
}
for (j = 0; j < FIXEDTESTSET; j++)
{
for (int n = j + 1; n < FIXEDTESTSET; n++)
{
DoTest(tblColl1, testCases[results[i][j]], testCases[results[i][n]], -1);
}
}
myCollation = null;
}
}
public void TestCommonCharacters()
{
char[] tmp1 = { (char)0x3058, (char)0x30B8 };
char[] tmp2 = { (char)0x3057, (char)0x3099, (char)0x30B7, (char)0x3099 };
CollationKey key1, key2;
int result;
String string1 = new String(tmp1);
String string2 = new String(tmp2);
RuleBasedCollator rb = (RuleBasedCollator)Collator.GetInstance(ULocale.JAPANESE);
rb.Strength = (Collator.QUATERNARY);
rb.IsAlternateHandlingShifted = (false);
result = rb.Compare(string1, string2);
key1 = rb.GetCollationKey(string1);
key2 = rb.GetCollationKey(string2);
if (result != 0 || !key1.Equals(key2))
{
Errln("Failed Hiragana and Katakana common characters test. Expected results to be equal.");
}
}
public void TestPinYin()
{
String[] seq
= { "\u963f", "\u554a", "\u54ce", "\u6371", "\u7231", "\u9f98",
"\u4e5c", "\u8baa", "\u4e42", "\u53c8" };
RuleBasedCollator collator = null;
try
{
collator = (RuleBasedCollator)Collator.GetInstance(
// ICU4N: See: https://stackoverflow.com/questions/9416435/what-culture-code-should-i-use-for-pinyin#comment11937203_9421566
new CultureInfo("zh-Hans")); //("zh", "", "PINYIN")); // ICU4N TODO: Can we replicate the 3rd parameter somehow?
}
catch (Exception e)
{
Warnln("ERROR: in creation of collator of zh__PINYIN locale");
return;
}
for (int i = 0; i < seq.Length - 1; i++)
{
CollationTest.DoTest(this, collator, seq[i], seq[i + 1], -1);
}
}
public void Init()
{
myCollation = Collator.GetInstance(new CultureInfo("ko") /* Locale.KOREAN */);
myCollation.Decomposition = (Collator.CANONICAL_DECOMPOSITION);
}
public void TestBasic()
{
Directory dir = NewDirectory();
RandomIndexWriter iw = new RandomIndexWriter(
#if FEATURE_INSTANCE_TESTDATA_INITIALIZATION
this,
#endif
Random, dir);
Document doc = new Document();
Field field = NewField("field", "", StringField.TYPE_STORED);
ICUCollationDocValuesField collationField = new ICUCollationDocValuesField("collated", Collator.GetInstance(new CultureInfo("en")));
doc.Add(field);
doc.Add(collationField);
field.SetStringValue("ABC");
collationField.SetStringValue("ABC");
iw.AddDocument(doc);
field.SetStringValue("abc");
collationField.SetStringValue("abc");
iw.AddDocument(doc);
IndexReader ir = iw.GetReader();
iw.Dispose();
IndexSearcher @is = NewSearcher(ir);
SortField sortField = new SortField("collated", SortFieldType.STRING);
TopDocs td = @is.Search(new MatchAllDocsQuery(), 5, new Sort(sortField));
assertEquals("abc", ir.Document(td.ScoreDocs[0].Doc).Get("field"));
assertEquals("ABC", ir.Document(td.ScoreDocs[1].Doc).Get("field"));
ir.Dispose();
dir.Dispose();
}