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diff --git a/Build/source/libs/icu/icu-xetex/test/intltest/tzbdtest.h b/Build/source/libs/icu/icu-xetex/test/intltest/tzbdtest.h
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index 00000000000..ecc867c9faf
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+++ b/Build/source/libs/icu/icu-xetex/test/intltest/tzbdtest.h
@@ -0,0 +1,99 @@
+/********************************************************************
+ * COPYRIGHT: 
+ * Copyright (c) 1997-2005, International Business Machines Corporation and
+ * others. All Rights Reserved.
+ ********************************************************************/
+
+#ifndef __TimeZoneBoundaryTest__
+#define __TimeZoneBoundaryTest__
+ 
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/timezone.h"
+#include "unicode/simpletz.h"
+#include "caltztst.h"
+
+/**
+ * A test which discovers the boundaries of DST programmatically and verifies
+ * that they are correct.
+ */
+class TimeZoneBoundaryTest: public CalendarTimeZoneTest {
+    // IntlTest override
+    void runIndexedTest( int32_t index, UBool exec, const char* &name, char* par );
+public: // package
+
+    TimeZoneBoundaryTest();
+
+    /**
+     * Date.toString().substring() Boundary Test
+     * Look for a DST changeover to occur within 6 months of the given Date.
+     * The initial Date.toString() should yield a string containing the
+     * startMode as a SUBSTRING.  The boundary will be tested to be
+     * at the expectedBoundary value.
+     */
+
+    /**
+     * internal routines used by major test routines to perform subtests
+     **/
+    virtual void findDaylightBoundaryUsingDate(UDate d, const char* startMode, UDate expectedBoundary);
+    virtual void findDaylightBoundaryUsingTimeZone(UDate d, UBool startsInDST, UDate expectedBoundary);
+    virtual void findDaylightBoundaryUsingTimeZone(UDate d, UBool startsInDST, UDate expectedBoundary, TimeZone* tz);
+ 
+private:
+    //static UnicodeString* showDate(long l);
+    UnicodeString showDate(UDate d);
+    static UnicodeString showNN(int32_t n);
+ 
+public: // package
+    /**
+     * Given a date, a TimeZone, and expected values for inDaylightTime,
+     * useDaylightTime, zone and DST offset, verify that this is the case.
+     */
+    virtual void verifyDST(UDate d, TimeZone* time_zone, UBool expUseDaylightTime, UBool expInDaylightTime, UDate expZoneOffset, UDate expDSTOffset);
+ 
+    /**
+     * Test the behavior of SimpleTimeZone at the transition into and out of DST.
+     * Use a binary search to find boundaries.
+     */
+    virtual void TestBoundaries(void);
+ 
+    /**
+     * internal subroutine used by TestNewRules
+     **/
+    virtual void testUsingBinarySearch(SimpleTimeZone* tz, UDate d, UDate expectedBoundary);
+ 
+    /**
+     * Test the handling of the "new" rules; that is, rules other than nth Day of week.
+     */
+    virtual void TestNewRules(void);
+ 
+    /**
+     * Find boundaries by stepping.
+     */
+    virtual void findBoundariesStepwise(int32_t year, UDate interval, TimeZone* z, int32_t expectedChanges);
+ 
+    /**
+     * Test the behavior of SimpleTimeZone at the transition into and out of DST.
+     * Use a stepwise march to find boundaries.
+     */ 
+    virtual void TestStepwise(void);
+    void verifyMapping(Calendar& cal, int year, int month, int dom, int hour,
+                    double epochHours) ;
+private:
+    const UDate ONE_SECOND;
+    const UDate ONE_MINUTE;
+    const UDate ONE_HOUR;
+    const UDate ONE_DAY;
+    const UDate ONE_YEAR;
+    const UDate SIX_MONTHS;
+    static const int32_t MONTH_LENGTH[];
+    static const UDate PST_1997_BEG;
+    static const UDate PST_1997_END;
+    static const UDate INTERVAL;
+};
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+ 
+#endif // __TimeZoneBoundaryTest__