MeasureUnit MeasureUnit::resolveUnitPerUnit(
        const MeasureUnit &unit, const MeasureUnit &perUnit, bool* isResolved) {
    int32_t unitOffset = unit.getOffset();
    int32_t perUnitOffset = perUnit.getOffset();

    // binary search for (unitOffset, perUnitOffset)
    int32_t start = 0;
    int32_t end = UPRV_LENGTHOF(unitPerUnitToSingleUnit);
    while (start < end) {
        int32_t mid = (start + end) / 2;
        int32_t *midRow = unitPerUnitToSingleUnit[mid];
        if (unitOffset < midRow[0]) {
            end = mid;
        } else if (unitOffset > midRow[0]) {
            start = mid + 1;
        } else if (perUnitOffset < midRow[1]) {
            end = mid;
        } else if (perUnitOffset > midRow[1]) {
            start = mid + 1;
        } else {
            // We found a resolution for our unit / per-unit combo
            // return it.
            *isResolved = true;
            return MeasureUnit(midRow[2], midRow[3]);
        }
    }

    *isResolved = false;
    return MeasureUnit();
}

MeasureUnit MeasureUnit::getPercent() {
    return MeasureUnit(3, 5);
}

void TimeUnitTest::testAPI() {
    //================= TimeUnit =================
    UErrorCode status = U_ZERO_ERROR;

    TimeUnit* tmunit = TimeUnit::createInstance(TimeUnit::UTIMEUNIT_YEAR, status);
    if (!assertSuccess("TimeUnit::createInstance", status)) return;

    TimeUnit* another = (TimeUnit*)tmunit->clone();
    TimeUnit third(*tmunit);
    TimeUnit fourth = third;

    assertTrue("orig and clone are equal", (*tmunit == *another));
    assertTrue("copied and assigned are equal", (third == fourth));

    TimeUnit* tmunit_m = TimeUnit::createInstance(TimeUnit::UTIMEUNIT_MONTH, status);
    assertTrue("year != month", (*tmunit != *tmunit_m));

    TimeUnit::UTimeUnitFields field = tmunit_m->getTimeUnitField();
    assertTrue("field of month time unit is month", (field == TimeUnit::UTIMEUNIT_MONTH));

    //===== Interoperability with MeasureUnit ======
    MeasureUnit **ptrs = new MeasureUnit *[TimeUnit::UTIMEUNIT_FIELD_COUNT];

    ptrs[TimeUnit::UTIMEUNIT_YEAR] = MeasureUnit::createYear(status);
    ptrs[TimeUnit::UTIMEUNIT_MONTH] = MeasureUnit::createMonth(status);
    ptrs[TimeUnit::UTIMEUNIT_DAY] = MeasureUnit::createDay(status);
    ptrs[TimeUnit::UTIMEUNIT_WEEK] = MeasureUnit::createWeek(status);
    ptrs[TimeUnit::UTIMEUNIT_HOUR] = MeasureUnit::createHour(status);
    ptrs[TimeUnit::UTIMEUNIT_MINUTE] = MeasureUnit::createMinute(status);
    ptrs[TimeUnit::UTIMEUNIT_SECOND] = MeasureUnit::createSecond(status);
    if (!assertSuccess("TimeUnit::createInstance", status)) return;

    for (TimeUnit::UTimeUnitFields j = TimeUnit::UTIMEUNIT_YEAR; 
            j < TimeUnit::UTIMEUNIT_FIELD_COUNT; 
            j = (TimeUnit::UTimeUnitFields)(j+1)) {
        MeasureUnit *ptr = TimeUnit::createInstance(j, status);
        if (!assertSuccess("TimeUnit::createInstance", status)) return;
        // We have to convert *ptr to a MeasureUnit or else == will fail over
        // differing types (TimeUnit vs. MeasureUnit).
        assertTrue(
                "Time unit should be equal to corresponding MeasureUnit",
                MeasureUnit(*ptr) == *ptrs[j]);
        delete ptr;
    }
    delete tmunit;
    delete another;
    delete tmunit_m;
    for (int i = 0; i < TimeUnit::UTIMEUNIT_FIELD_COUNT; ++i) {
        delete ptrs[i];
    }
    delete [] ptrs;

    //
    //================= TimeUnitAmount =================

    Formattable formattable((int32_t)2);
    TimeUnitAmount tma_long(formattable, TimeUnit::UTIMEUNIT_DAY, status);
    if (!assertSuccess("TimeUnitAmount(formattable...)", status)) return;

    formattable.setDouble(2);
    TimeUnitAmount tma_double(formattable, TimeUnit::UTIMEUNIT_DAY, status);
    if (!assertSuccess("TimeUnitAmount(formattable...)", status)) return;

    formattable.setDouble(3);
    TimeUnitAmount tma_double_3(formattable, TimeUnit::UTIMEUNIT_DAY, status);
    if (!assertSuccess("TimeUnitAmount(formattable...)", status)) return;

    TimeUnitAmount tma(2, TimeUnit::UTIMEUNIT_DAY, status);
    if (!assertSuccess("TimeUnitAmount(number...)", status)) return;

    TimeUnitAmount tma_h(2, TimeUnit::UTIMEUNIT_HOUR, status);
    if (!assertSuccess("TimeUnitAmount(number...)", status)) return;

    TimeUnitAmount second(tma);
    TimeUnitAmount third_tma = tma;
    TimeUnitAmount* fourth_tma = (TimeUnitAmount*)tma.clone();

    assertTrue("orig and copy are equal", (second == tma));
    assertTrue("clone and assigned are equal", (third_tma == *fourth_tma));
    assertTrue("different if number diff", (tma_double != tma_double_3));
    assertTrue("different if number type diff", (tma_double != tma_long));
    assertTrue("different if time unit diff", (tma != tma_h));
    assertTrue("same even different constructor", (tma_double == tma));

    assertTrue("getTimeUnitField", (tma.getTimeUnitField() == TimeUnit::UTIMEUNIT_DAY));
    delete fourth_tma;
    //
    //================= TimeUnitFormat =================
    //
    TimeUnitFormat* tmf_en = new TimeUnitFormat(Locale("en"), status);
    if (!assertSuccess("TimeUnitFormat(en...)", status, TRUE)) return;
    TimeUnitFormat tmf_fr(Locale("fr"), status);
    if (!assertSuccess("TimeUnitFormat(fr...)", status)) return;

    assertTrue("TimeUnitFormat: en and fr diff", (*tmf_en != tmf_fr));

    TimeUnitFormat tmf_assign = *tmf_en;
    assertTrue("TimeUnitFormat: orig and assign are equal", (*tmf_en == tmf_assign));

    TimeUnitFormat tmf_copy(tmf_fr);
//.........这里部分代码省略.........