2 *******************************************************************************
3 * Copyright (C) 2001-2010, International Business Machines Corporation and *
4 * others. All Rights Reserved. *
5 *******************************************************************************
9 * Port From: ICU4C v1.8.1 : format : DateFormatRoundTripTest
10 * Source File: $ICU4CRoot/source/test/intltest/dtfmtrtts.cpp
13 package com.ibm.icu.dev.test.format;
15 import java.text.FieldPosition;
16 import java.text.ParseException;
17 import java.util.Date;
18 import java.util.Locale;
19 import java.util.Random;
21 import com.ibm.icu.text.DateFormat;
22 import com.ibm.icu.text.SimpleDateFormat;
23 import com.ibm.icu.util.Calendar;
24 import com.ibm.icu.util.GregorianCalendar;
25 import com.ibm.icu.util.TimeZone;
28 * Performs round-trip tests for DateFormat
30 public class DateFormatRoundTripTest extends com.ibm.icu.dev.test.TestFmwk {
31 public boolean INFINITE = false;
32 public boolean quick = true;
33 private SimpleDateFormat dateFormat;
34 private Calendar getFieldCal;
35 private int SPARSENESS = 18;
36 private int TRIALS = 4;
37 private int DEPTH = 5;
40 public static void main(String[] args) throws Exception {
41 new DateFormatRoundTripTest().run(args);
44 public void TestDateFormatRoundTrip() {
45 dateFormat = new SimpleDateFormat("EEE MMM dd HH:mm:ss.SSS zzz yyyy G");
46 getFieldCal = Calendar.getInstance();
47 ran = createRandom(); // use test framework's random seed
49 final Locale[] avail = DateFormat.getAvailableLocales();
50 int locCount = avail.length;
51 logln("DateFormat available locales: " + locCount);
55 logln("Quick mode: only testing first 5 Locales");
57 TimeZone tz = TimeZone.getDefault();
58 logln("Default TimeZone: " + tz.getID());
61 // Special infinite loop test mode for finding hard to reproduce errors
62 Locale loc = Locale.getDefault();
63 logln("ENTERING INFINITE TEST LOOP FOR Locale: " + loc.getDisplayName());
68 _test(Locale.getDefault());
69 for (int i = 0; i < locCount; ++i) {
75 public String styleName(int s) {
77 case DateFormat.SHORT :
79 case DateFormat.MEDIUM :
81 case DateFormat.LONG :
83 case DateFormat.FULL :
90 public void _test(Locale loc) {
92 logln("Locale: " + loc.getDisplayName());
94 // Total possibilities = 24
98 boolean[] TEST_TABLE = new boolean[24];
100 for (i = 0; i < 24; ++i)
101 TEST_TABLE[i] = true;
103 // If we have some sparseness, implement it here. Sparseness decreases
104 // test time by eliminating some tests, up to 23.
105 for (i = 0; i < SPARSENESS; i++) {
106 int random = (int) (ran.nextDouble() * 24);
107 if (random >= 0 && random < 24 && TEST_TABLE[i]) {
108 TEST_TABLE[random] = false;
114 for (style = DateFormat.FULL; style <= DateFormat.SHORT; ++style) {
115 if (TEST_TABLE[itable++]) {
116 logln("Testing style " + styleName(style));
117 DateFormat df = DateFormat.getDateInstance(style, loc);
122 for (style = DateFormat.FULL; style <= DateFormat.SHORT; ++style) {
123 if (TEST_TABLE[itable++]) {
124 logln("Testing style " + styleName(style));
125 DateFormat df = DateFormat.getTimeInstance(style, loc);
130 for (int dstyle = DateFormat.FULL; dstyle <= DateFormat.SHORT; ++dstyle) {
131 for (int tstyle = DateFormat.FULL; tstyle <= DateFormat.SHORT; ++tstyle) {
132 if (TEST_TABLE[itable++]) {
133 logln("Testing dstyle " + styleName(dstyle) + ", tstyle " + styleName(tstyle));
134 DateFormat df = DateFormat.getDateTimeInstance(dstyle, tstyle, loc);
141 public void _test(DateFormat fmt, boolean timeOnly) {
143 if (!(fmt instanceof SimpleDateFormat)) {
144 errln("DateFormat wasn't a SimpleDateFormat");
148 String pat = ((SimpleDateFormat) fmt).toPattern();
151 // NOTE TO MAINTAINER
152 // This indexOf check into the pattern needs to be refined to ignore
153 // quoted characters. Currently, this isn't a problem with the locale
154 // patterns we have, but it may be a problem later.
156 boolean hasEra = (pat.indexOf("G") != -1);
157 boolean hasZoneDisplayName = (pat.indexOf("z") != -1) || (pat.indexOf("v") != -1) || (pat.indexOf("V") != -1);
159 // Because patterns contain incomplete data representing the Date,
160 // we must be careful of how we do the roundtrip. We start with
161 // a randomly generated Date because they're easier to generate.
162 // From this we get a string. The string is our real starting point,
163 // because this string should parse the same way all the time. Note
164 // that it will not necessarily parse back to the original date because
165 // of incompleteness in patterns. For example, a time-only pattern won't
166 // parse back to the same date.
169 for (int i = 0; i < TRIALS; ++i) {
170 Date[] d = new Date[DEPTH];
171 String[] s = new String[DEPTH];
173 d[0] = generateDate();
175 // We go through this loop until we achieve a match or until
176 // the maximum loop count is reached. We record the points at
177 // which the date and the string starts to match. Once matching
178 // starts, it should continue.
180 int dmatch = 0; // d[dmatch].getTime() == d[dmatch-1].getTime()
181 int smatch = 0; // s[smatch].equals(s[smatch-1])
182 for (loop = 0; loop < DEPTH; ++loop) {
184 d[loop] = fmt.parse(s[loop - 1]);
187 s[loop] = fmt.format(d[loop]);
191 boolean match = s[loop].equals(s[loop - 1]);
197 errln("FAIL: String mismatch after match");
201 // {sfb} watch out here, this might not work
202 boolean match = d[loop].getTime() == d[loop - 1].getTime();
208 errln("FAIL: Date mismatch after match");
211 if (smatch != 0 && dmatch != 0)
215 // At this point loop == DEPTH if we've failed, otherwise loop is the
216 // max(smatch, dmatch), that is, the index at which we have string and
219 // Date usually matches in 2. Exceptions handled below.
222 if (dmatch > maxDmatch || smatch > maxSmatch) {
224 if (!timeOnly && !hasEra && getField(d[0], Calendar.ERA) == GregorianCalendar.BC) {
228 if (hasZoneDisplayName &&
229 (fmt.getTimeZone().inDaylightTime(d[0])
230 || fmt.getTimeZone().inDaylightTime(d[1])
231 || d[0].getTime() < 0L /* before 1970 */)) {
239 if (dmatch > maxDmatch || smatch > maxSmatch) {
240 SimpleDateFormat sdf = new SimpleDateFormat("EEEE, MMMM d, yyyy HH:mm:ss, z G", Locale.US);
241 logln("Date = " + sdf.format(d[0]) + "; ms = " + d[0].getTime());
242 logln("Dmatch: " + dmatch + " maxD: " + maxDmatch + " Smatch:" + smatch + " maxS:" + maxSmatch);
243 for (int j = 0; j <= loop && j < DEPTH; ++j) {
244 StringBuffer temp = new StringBuffer("");
245 FieldPosition pos = new FieldPosition(0);
246 logln((j > 0 ? " P> " : " ") + dateFormat.format(d[j], temp, pos)
247 + " F> " + s[j] + (j > 0 && d[j].getTime() == d[j - 1].getTime() ? " d==" : "")
248 + (j > 0 && s[j].equals(s[j - 1]) ? " s==" : ""));
250 errln("Pattern: " + pat + " failed to match" + "; ms = " + d[0].getTime());
253 } catch (ParseException e) {
254 errln("Exception: " + e.getMessage());
259 public int getField(Date d, int f) {
260 getFieldCal.setTime(d);
261 int ret = getFieldCal.get(f);
265 public Date generateDate() {
266 double a = ran.nextDouble();
267 // Now 'a' ranges from 0..1; scale it to range from 0 to 8000 years
269 // Range from (4000-1970) BC to (8000-1970) AD
271 // Now scale up to ms
272 a *= 365.25 * 24 * 60 * 60 * 1000;
273 return new Date((long)a);