/*
**********************************************************************
*   Copyright (C) 1999 Alan Liu and others. All rights reserved.
**********************************************************************
*   Date        Name        Description
*   10/20/99    alan        Creation.
*   03/22/2000  Madhu       Added additional tests
**********************************************************************
*/

#include "unicode/utypes.h"
#include "usettest.h"
#include "unicode/uniset.h"

UnicodeString operator+(const UnicodeString& left, const UnicodeSet& set) {
    UnicodeString pat;
    set.toPattern(pat);
    return left + UnicodeSetTest::escape(pat);
}

#define CASE(id,test) case id:                          \
                          name = #test;                 \
                          if (exec) {                   \
                              logln(#test "---");       \
                              logln((UnicodeString)""); \
                              test();                   \
                          }                             \
                          break

void
UnicodeSetTest::runIndexedTest(int32_t index, UBool exec,
                               char* &name, char* par) {
    // if (exec) logln((UnicodeString)"TestSuite UnicodeSetTest");
    switch (index) {
        CASE(0,TestPatterns);
        CASE(1,TestAddRemove);
        CASE(2,TestCategories);
        CASE(3,TestCloneEqualHash);
        CASE(4,TestMinimalRep);
        CASE(5,TestAPI);
        CASE(6,TestExhaustive);
		default: name = ""; break;
    }
}

void
UnicodeSetTest::TestPatterns(void) {
    UnicodeSet set;
    expectPattern(set, "[[a-m]&[d-z]&[k-y]]",  "km");
    expectPattern(set, "[[a-z]-[m-y]-[d-r]]",  "aczz");
    expectPattern(set, "[a\\-z]",  "--aazz");
    expectPattern(set, "[-az]",  "--aazz");
    expectPattern(set, "[az-]",  "--aazz");
    expectPattern(set, "[[[a-z]-[aeiou]i]]", "bdfnptvz");

    // Throw in a test of complement
    set.complement();
    UnicodeString exp;
    exp.append((UChar)0x0000).append("aeeoouu").append((UChar)('z'+1)).append((UChar)0xFFFF);
    expectPairs(set, exp);
}

void
UnicodeSetTest::TestCategories(void) {
    UErrorCode status = U_ZERO_ERROR;
    const char* pat = " [:Lu:] "; // Whitespace ok outside [:..:]
    UnicodeSet set(pat, status);
    if (U_FAILURE(status)) {
        errln((UnicodeString)"Fail: Can't construct set with " + pat);
    } else {
        expectContainment(set, pat, "ABC", "abc");
    }

    UChar32 i;
    int32_t failures = 0;
    // Make sure generation of L doesn't pollute cached Lu set
    // First generate L, then Lu
    UChar32 TOP = 0x200; // Don't need to go over the whole range:
    set.applyPattern("[:L:]", status);
    if (U_FAILURE(status)) { errln("FAIL"); return; }
    for (i=0; i<0x200; ++i) {
        UBool l = Unicode::isLetter((UChar)i);
        if (l != set.contains(i)) {
            errln((UnicodeString)"FAIL: L contains " + (unsigned short)i + " = " + 
                  set.contains(i));
            if (++failures == 10) break;
        }
    }
    
    set.applyPattern("[:Lu:]", status);
    if (U_FAILURE(status)) { errln("FAIL"); return; }
    for (i=0; i<0x200; ++i) {
        UBool lu = (Unicode::getType((UChar)i) == Unicode::UPPERCASE_LETTER);
        if (lu != set.contains(i)) {
            errln((UnicodeString)"FAIL: Lu contains " + (unsigned short)i + " = " + 
                  set.contains(i));
            if (++failures == 20) break;
        }
    }
}
void
UnicodeSetTest::TestCloneEqualHash(void) {
	UErrorCode status = U_ZERO_ERROR;
	int8_t category=Unicode::LOWERCASE_LETTER;
	UnicodeSet *set1=new UnicodeSet(category, status); //  :Li: Letter, lowercase
	if (U_FAILURE(status)){
		errln((UnicodeString)"FAIL: Can't construst set with cateegory->Ll");
		return;
	}
	category=Unicode::DECIMAL_DIGIT_NUMBER;
	UnicodeSet *set2=new UnicodeSet(category, status);   //Number, Decimal digit
	if (U_FAILURE(status)){
		errln((UnicodeString)"FAIL: Can't construct set with cateegory->Nd");
		return;
	}
	
	logln("Testing copy construction");
	UnicodeSet *set1copy=new UnicodeSet(*set1);
	if(*set1 != *set1copy || *set1 == *set2 || 
		getPairs(*set1) != getPairs(*set1copy) ||
		set1->hashCode() != set1copy->hashCode()){
		errln("FAIL : Error in copy construction");
		return;
	}

	logln("Testing =operator");
	UnicodeSet set1equal=*set1;
	UnicodeSet set2equal=*set2;
	if(set1equal != *set1 || set1equal != *set1copy || set2equal != *set2 || 
		set2equal == *set1 || set2equal == *set1copy || set2equal == set1equal){
		errln("FAIL: Error in =operator");
	}
	
	logln("Testing clone()");
	UnicodeSet *set1clone=(UnicodeSet*)set1->clone();
	UnicodeSet *set2clone=(UnicodeSet*)set2->clone();
	if(*set1clone != *set1 || *set1clone != *set1copy || *set1clone != set1equal || 
		*set2clone != *set2 || *set2clone == *set1copy || *set2clone != set2equal || 
		*set2clone == *set1 || *set2clone == set1equal || *set2clone == *set1clone){
		errln("FAIL: Error in clone");
	}
	
	logln("Testing hashcode");
    if(set1->hashCode() != set1equal.hashCode() || set1->hashCode() != set1clone->hashCode() ||
		set2->hashCode() != set2equal.hashCode() || set2->hashCode() != set2clone->hashCode() ||
		set1copy->hashCode() != set1equal.hashCode() || set1copy->hashCode() != set1clone->hashCode() ||
		set1->hashCode() == set2->hashCode()  || set1copy->hashCode() == set2->hashCode() ||
		set2->hashCode() == set1clone->hashCode() || set2->hashCode() == set1equal.hashCode() ){
		errln("FAIL: Error in hashCode()");
	}

	delete set1;
	delete set1copy;
	delete set2;
    

}
void
UnicodeSetTest::TestAddRemove(void) {
	UErrorCode status = U_ZERO_ERROR;
    UnicodeSet set; // Construct empty set
	doAssert(set.isEmpty() == TRUE, "set should be empty");
	doAssert(set.size() == 0, "size should be 0");
    set.add('a', 'z');
    expectPairs(set, "az");
	doAssert(set.isEmpty() == FALSE, "set should not be empty");
    doAssert(set.size() != 0, "size should not be equal to 0");
	doAssert(set.size() == 26, "size should be equal to 26");
    set.remove('m', 'p');
	expectPairs(set, "alqz");
	doAssert(set.size() == 22, "size should be equal to 22");
    set.remove('e', 'g');
    expectPairs(set, "adhlqz");
	doAssert(set.size() == 19, "size should be equal to 19");
    set.remove('d', 'i');
    expectPairs(set, "acjlqz");
	doAssert(set.size() == 16, "size should be equal to 16");
    set.remove('c', 'r');
    expectPairs(set, "absz");
	doAssert(set.size() == 10, "size should be equal to 10");
    set.add('f', 'q');
    expectPairs(set, "abfqsz");
	doAssert(set.size() == 22, "size should be equal to 22");
    set.remove('a', 'g');
    expectPairs(set, "hqsz");
    set.remove('a', 'z');
    expectPairs(set, "");
	doAssert(set.isEmpty() == TRUE, "set should be empty");
	doAssert(set.size() == 0, "size should be 0");
	set.add('a');
	doAssert(set.isEmpty() == FALSE, "set should not be empty");
    doAssert(set.size() == 1, "size should not be equal to 1");
	set.add('b');
	set.add('c');
	expectPairs(set, "ac");
	doAssert(set.size() == 3, "size should not be equal to 3");
	set.add('p');
	set.add('q');
	expectPairs(set, "acpq");
	doAssert(set.size() == 5, "size should not be equal to 5");
	set.clear();
    expectPairs(set, "");
	doAssert(set.isEmpty() == TRUE, "set should be empty");
	doAssert(set.size() == 0, "size should be 0");

    // Try removing an entire set from another set
    expectPattern(set, "[c-x]", "cx");
    UnicodeSet set2;
    expectPattern(set2, "[f-ky-za-bc[vw]]", "acfkvwyz");
    set.removeAll(set2);
    expectPairs(set, "deluxx");

    // Try adding an entire set to another set
    expectPattern(set, "[jackiemclean]", "aacceein");
    expectPattern(set2, "[hitoshinamekatajamesanderson]", "aadehkmort");
    set.addAll(set2);
    expectPairs(set, "aacehort");
    doAssert(set.containsAll(set2) == TRUE, "set should contain all the elements in set2");

	// Try retaining an set of elements contained in another set (intersection)
	UnicodeSet set3;
	expectPattern(set3, "[a-c]", "ac");
	doAssert(set.containsAll(set3) == FALSE, "set doesn't contain all the elements in set3");
	set3.remove('b');
	expectPairs(set3, "aacc");
	doAssert(set.containsAll(set3) == TRUE, "set should contain all the elements in set3");
	set.retainAll(set3);
	expectPairs(set, "aacc");
	doAssert(set.size() == set3.size(), "set.size() should be set3.size()");
	doAssert(set.containsAll(set3) == TRUE, "set should contain all the elements in set3");
	set.clear();
	doAssert(set.size() != set3.size(), "set.size() != set3.size()");

    // Test commutativity
    expectPattern(set, "[hitoshinamekatajamesanderson]", "aadehkmort");
    expectPattern(set2, "[jackiemclean]", "aacceein");
    set.addAll(set2);
    expectPairs(set, "aacehort");
	doAssert(set.containsAll(set2) == TRUE, "set should contain all the elements in set2");


}

/**
 * Make sure minimal representation is maintained.
 */
void UnicodeSetTest::TestMinimalRep() {
    UErrorCode status = U_ZERO_ERROR;
    // This is pretty thoroughly tested by checkCanonicalRep()
    // run against the exhaustive operation results.  Use the code
    // here for debugging specific spot problems.

    // 1 overlap against 2
    UnicodeSet set("[h-km-q]", status);
    if (U_FAILURE(status)) { errln("FAIL"); return; }
    UnicodeSet set2("[i-o]", status);
    if (U_FAILURE(status)) { errln("FAIL"); return; }
    set.addAll(set2);
    expectPairs(set, "hq");
    // right
    set.applyPattern("[a-m]", status);
    if (U_FAILURE(status)) { errln("FAIL"); return; }
    set2.applyPattern("[e-o]", status);
    if (U_FAILURE(status)) { errln("FAIL"); return; }
    set.addAll(set2);
    expectPairs(set, "ao");
    // left
    set.applyPattern("[e-o]", status);
    if (U_FAILURE(status)) { errln("FAIL"); return; }
    set2.applyPattern("[a-m]", status);
    if (U_FAILURE(status)) { errln("FAIL"); return; }
    set.addAll(set2);
    expectPairs(set, "ao");
    // 1 overlap against 3
    set.applyPattern("[a-eg-mo-w]", status);
    if (U_FAILURE(status)) { errln("FAIL"); return; }
    set2.applyPattern("[d-q]", status);
    if (U_FAILURE(status)) { errln("FAIL"); return; }
    set.addAll(set2);
    expectPairs(set, "aw");
}

void UnicodeSetTest::TestAPI() {
    UErrorCode status = U_ZERO_ERROR;
    // default ct
    UnicodeSet set;
    if (!set.isEmpty() || set.getRangeCount() != 0) {
        errln((UnicodeString)"FAIL, set should be empty but isn't: " +
              set);
    }

    // clear(), isEmpty()
    set.add('a');
    if (set.isEmpty()) {
        errln((UnicodeString)"FAIL, set shouldn't be empty but is: " +
              set);
    }
    set.clear();
    if (!set.isEmpty()) {
        errln((UnicodeString)"FAIL, set should be empty but isn't: " +
              set);
    }

    // size()
    set.clear();
    if (set.size() != 0) {
        errln((UnicodeString)"FAIL, size should be 0, but is " + set.size() +
              ": " + set);
    }
    set.add('a');
    if (set.size() != 1) {
        errln((UnicodeString)"FAIL, size should be 1, but is " + set.size() +
              ": " + set);
    }
    set.add('1', '9');
    if (set.size() != 10) {
        errln((UnicodeString)"FAIL, size should be 10, but is " + set.size() +
              ": " + set);
    }

    // contains(first, last)
    set.clear();
    set.applyPattern("[A-Y 1-8 b-d l-y]", status);
    if (U_FAILURE(status)) { errln("FAIL"); return; }
    for (int32_t i = 0; i<set.getRangeCount(); ++i) {
        UChar32 a = set.getRangeStart(i);
        UChar32 b = set.getRangeEnd(i);
        if (!set.contains(a, b)) {
            errln((UnicodeString)"FAIL, should contain " + (unsigned short)a + '-' + (unsigned short)b +
                  " but doesn't: " + set);
        }
        if (set.contains((UChar32)(a-1), b)) {
            errln((UnicodeString)"FAIL, shouldn't contain " +
                  (unsigned short)(a-1) + '-' + (unsigned short)b +
                  " but does: " + set);
        }
        if (set.contains(a, (UChar32)(b+1))) {
            errln((UnicodeString)"FAIL, shouldn't contain " +
                  (unsigned short)a + '-' + (unsigned short)(b+1) +
                  " but does: " + set);
        }
    }

    // Ported InversionList test.
    UnicodeSet a((UChar32)3,(UChar32)10);
    UnicodeSet b((UChar32)7,(UChar32)15);
    UnicodeSet c;

    logln((UnicodeString)"a [3-10]: " + a);
    logln((UnicodeString)"b [7-15]: " + b);
    c = a; c.addAll(b);
    UnicodeSet exp((UChar32)3,(UChar32)15);
    if (c == exp) {
        logln((UnicodeString)"c.set(a).add(b): " + c);
    } else {
        errln((UnicodeString)"FAIL: c.set(a).add(b) = " + c + ", expect " + exp);
    }
    c.complement();
    exp.set((UChar32)0, (UChar32)2);
    exp.add((UChar32)16, UnicodeSet::MAX_VALUE);
    if (c == exp) {
        logln((UnicodeString)"c.complement(): " + c);
    } else {
        errln((UnicodeString)"FAIL: c.complement() = " + c + ", expect " + exp);
    }
    c.complement();
    exp.set((UChar32)3, (UChar32)15);
    if (c == exp) {
        logln((UnicodeString)"c.complement(): " + c);
    } else {
        errln((UnicodeString)"FAIL: c.complement() = " + c + ", expect " + exp);
    }
    c = a; c.complementAll(b);
    exp.set((UChar32)3,(UChar32)6);
    exp.add((UChar32)11,(UChar32) 15);
    if (c == exp) {
        logln((UnicodeString)"c.set(a).exclusiveOr(b): " + c);
    } else {
        errln((UnicodeString)"FAIL: c.set(a).exclusiveOr(b) = " + c + ", expect " + exp);
    }

    exp = c;
    bitsToSet(setToBits(c), c);
    if (c == exp) {
        logln((UnicodeString)"bitsToSet(setToBits(c)): " + c);
    } else {
        errln((UnicodeString)"FAIL: bitsToSet(setToBits(c)) = " + c + ", expect " + exp);
    }
}

void UnicodeSetTest::TestExhaustive() {
    // exhaustive tests. Simulate UnicodeSets with integers.
    // That gives us very solid tests (except for large memory tests).

    UChar32 limit = (UChar32)128;

    UnicodeSet x, y, z;

    for (UChar32 i = 0; i < limit; ++i) {
        bitsToSet(i, x);
        logln((UnicodeString)"Testing " + i + ", " + x);
        _testComplement(i, x, y);
        for (UChar32 j = 0; j < limit; ++j) {
            _testAdd(i,j,  x,y,z);
            _testXor(i,j,  x,y,z);
            _testRetain(i,j,  x,y,z);
            _testRemove(i,j,  x,y,z);
        }
    }
}

void UnicodeSetTest::_testComplement(int32_t a, UnicodeSet& x, UnicodeSet& z) {
    bitsToSet(a, x);
    z = x;
    z.complement();
    int32_t c = setToBits(z);
    if (c != (~a)) {
        errln((UnicodeString)"FAILED: add: ~" + x +  " != " + z);
        errln((UnicodeString)"FAILED: add: ~" + a + " != " + c);
    }
    checkCanonicalRep(z, "complement " + a);
}

void UnicodeSetTest::_testAdd(int32_t a, int32_t b, UnicodeSet& x, UnicodeSet& y, UnicodeSet& z) {
    bitsToSet(a, x);
    bitsToSet(b, y);
    z = x;
    z.addAll(y);
    int32_t c = setToBits(z);
    if (c != (a | b)) {
        errln((UnicodeString)"FAILED: add: " + x + " | " + y + " != " + z);
        errln((UnicodeString)"FAILED: add: " + a + " | " + b + " != " + c);
    }
    checkCanonicalRep(z, (UnicodeString)"add " + a + "," + b);
}

void UnicodeSetTest::_testRetain(int32_t a, int32_t b, UnicodeSet& x, UnicodeSet& y, UnicodeSet& z) {
    bitsToSet(a, x);
    bitsToSet(b, y);
    z = x;
    z.retainAll(y);
    int32_t c = setToBits(z);
    if (c != (a & b)) {
        errln((UnicodeString)"FAILED: retain: " + x + " & " + y + " != " + z);
        errln((UnicodeString)"FAILED: retain: " + a + " & " + b + " != " + c);
    }
    checkCanonicalRep(z, (UnicodeString)"retain " + a + "," + b);
}

void UnicodeSetTest::_testRemove(int32_t a, int32_t b, UnicodeSet& x, UnicodeSet& y, UnicodeSet& z) {
    bitsToSet(a, x);
    bitsToSet(b, y);
    z = x;
    z.removeAll(y);
    int32_t c = setToBits(z);
    if (c != (a &~ b)) {
        errln((UnicodeString)"FAILED: remove: " + x + " &~ " + y + " != " + z);
        errln((UnicodeString)"FAILED: remove: " + a + " &~ " + b + " != " + c);
    }
    checkCanonicalRep(z, (UnicodeString)"remove " + a + "," + b);
}

void UnicodeSetTest::_testXor(int32_t a, int32_t b, UnicodeSet& x, UnicodeSet& y, UnicodeSet& z) {
    bitsToSet(a, x);
    bitsToSet(b, y);
    z = x;
    z.complementAll(y);
    int32_t c = setToBits(z);
    if (c != (a ^ b)) {
        errln((UnicodeString)"FAILED: complement: " + x + " ^ " + y + " != " + z);
        errln((UnicodeString)"FAILED: complement: " + a + " ^ " + b + " != " + c);
    }
    checkCanonicalRep(z, (UnicodeString)"complement " + a + "," + b);
}

/**
 * Check that ranges are monotonically increasing and non-
 * overlapping.
 */
void UnicodeSetTest::checkCanonicalRep(const UnicodeSet& set, const UnicodeString& msg) {
    int32_t n = set.getRangeCount();
    if (n < 0) {
        errln((UnicodeString)"FAIL result of " + msg +
              ": range count should be >= 0 but is " +
              n /*+ " for " + set.toPattern())*/);
        return;
    }
    UChar32 last = 0;
    for (int32_t i=0; i<n; ++i) {
        UChar32 start = set.getRangeStart(i);
        UChar32 end = set.getRangeEnd(i);
        if (start > end) {
            errln((UnicodeString)"FAIL result of " + msg +
                  ": range " + (i+1) +
                  " start > end: " + start + ", " + end +
                  " for " + set);
        }
        if (i > 0 && start <= last) {
            errln((UnicodeString)"FAIL result of " + msg +
                  ": range " + (i+1) +
                  " overlaps previous range: " + start + ", " + end +
                  " for " + set);
        }
        last = end;
    }
}

/**
 * Convert a bitmask to a UnicodeSet.
 */
void UnicodeSetTest::bitsToSet(int32_t a, UnicodeSet& result) {
    result.clear();
    for (UChar32 i = 0; i < 32; ++i) {
        if ((a & (1<<i)) != 0) {
            result.add(i);
        }
    }
}

/**
 * Convert a UnicodeSet to a bitmask.  Only the characters
 * U+0000 to U+0020 are represented in the bitmask.
 */
int32_t UnicodeSetTest::setToBits(const UnicodeSet& x) {
    int32_t result = 0;
    for (int32_t i = 0; i < 32; ++i) {
        if (x.contains((UChar32)i)) {
            result |= (1<<i);
        }
    }
    return result;
}

/**
 * Return the representation of an inversion list based UnicodeSet
 * as a pairs list.  Ranges are listed in ascending Unicode order.
 * For example, the set [a-zA-M3] is represented as "33AMaz".
 */
UnicodeString UnicodeSetTest::getPairs(const UnicodeSet& set) {
    UnicodeString pairs;
    for (int32_t i=0; i<set.getRangeCount(); ++i) {
        UChar32 start = set.getRangeStart(i);
        UChar32 end = set.getRangeEnd(i);
        if (end > 0xFFFF) {
            end = 0xFFFF;
            i = set.getRangeCount(); // Should be unnecessary
        }
        pairs.append((UChar)start).append((UChar)end);
    }
    return pairs;
}

void
UnicodeSetTest::expectContainment(const UnicodeSet& set,
                                  const UnicodeString& setName,
                                  const UnicodeString& charsIn,
                                  const UnicodeString& charsOut) {
    UnicodeString bad;
    int32_t i;
    for (i=0; i<charsIn.length(); ++i) {
        UChar c = charsIn.charAt(i);
        if (!set.contains(c)) {
            bad.append(c);
        }
    }
    if (bad.length() > 0) {
        logln((UnicodeString)"Fail: set " + setName + " does not contain " + bad +
              ", expected containment of " + charsIn);
    } else {
        logln((UnicodeString)"Ok: set " + setName + " contains " + charsIn);
    }

    bad.truncate(0);
    for (i=0; i<charsOut.length(); ++i) {
        UChar c = charsOut.charAt(i);
        if (set.contains(c)) {
            bad.append(c);
        }
    }
    if (bad.length() > 0) {
        logln((UnicodeString)"Fail: set " + setName + " contains " + bad +
              ", expected non-containment of " + charsOut);
    } else {
        logln((UnicodeString)"Ok: set " + setName + " does not contain " + charsOut);
    }
}

void
UnicodeSetTest::expectPattern(UnicodeSet& set,
                              const UnicodeString& pattern,
                              const UnicodeString& expectedPairs){
    UErrorCode status = U_ZERO_ERROR;
	set.applyPattern(pattern, status);
	if (U_FAILURE(status)) {
		errln(UnicodeString("FAIL: applyPattern(\"") + pattern +
              "\") failed");
		return;
	} else {
        if (getPairs(set) != expectedPairs ) {
            errln(UnicodeString("FAIL: applyPattern(\"") + pattern +
                  "\") => pairs \"" +
                  escape(getPairs(set)) + "\", expected \"" +
                  escape(expectedPairs) + "\"");
        } else {
            logln(UnicodeString("Ok:   applyPattern(\"") + pattern +
                  "\") => pairs \"" +
                  escape(getPairs(set)) + "\"");
        }
    }
	// the result of calling set.toPattern(), which is the string representation of
	// this set(set), is passed to a  UnicodeSet constructor, and tested that it 
	// will produce another set that is equal to this one.
	UnicodeString temppattern;
	set.toPattern(temppattern);
	UnicodeSet *tempset=new UnicodeSet(temppattern, status);
	if (U_FAILURE(status)) {
		errln(UnicodeString("FAIL: Construction with the pattern derived from toPattern() failed"));
        return;
	}
	if(*tempset != set || getPairs(*tempset) != getPairs(set)){
		errln(UnicodeString("FAIL: "+ pattern + "!=>" + temppattern + ". Pairs \""+ escape(getPairs(*tempset)) + "\" expected->\"" +
			escape(getPairs(set)) + "\""));
	} else{
		logln(UnicodeString("OK:  "+ pattern + "==>" + temppattern + ".  Pairs \"" + escape(getPairs(*tempset)) + "\""));
	}
	
	delete tempset;
    	
}

void
UnicodeSetTest::expectPairs(const UnicodeSet& set, const UnicodeString& expectedPairs) {
    if (getPairs(set) != expectedPairs) {
        errln(UnicodeString("FAIL: Expected pair list \"") +
              escape(expectedPairs) + "\", got \"" +
              escape(getPairs(set)) + "\"");
    }
}

static UChar toHexString(int32_t i) { return i + (i < 10 ? 0x30 : (0x41 - 10)); }

void
UnicodeSetTest::doAssert(UBool condition, const char *message)
{
    if (!condition) {
        errln(UnicodeString("ERROR : ") + message);
    }
}

UnicodeString
UnicodeSetTest::escape(const UnicodeString& s) {
    UnicodeString buf;
    for (int32_t i=0; i<s.length(); ++i)
    {
        UChar c = s[(UTextOffset)i];
        if (' ' <= c && c <= (UChar)0x7F) {
            buf += c;
        } else {
            buf += (UChar)0x5c; buf += (UChar)0x55;
            buf += toHexString((c & 0xF000) >> 12);
            buf += toHexString((c & 0x0F00) >> 8);
            buf += toHexString((c & 0x00F0) >> 4);
            buf += toHexString(c & 0x000F);
        }
    }
    return buf;
}