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ggregory pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/commons-lang.git

commit bcdff98f02c3ef011187f2dbf7934a3ea3a48db5
Author: Gary Gregory <[email protected]>
AuthorDate: Tue Oct 20 11:45:46 2020 -0400

    Sort methods.
---
 .../commons/lang3/time/FastDateParserTest.java     | 822 ++++++++++-----------
 1 file changed, 411 insertions(+), 411 deletions(-)

diff --git 
a/src/test/java/org/apache/commons/lang3/time/FastDateParserTest.java 
b/src/test/java/org/apache/commons/lang3/time/FastDateParserTest.java
index 5a15ea3..817de7b 100644
--- a/src/test/java/org/apache/commons/lang3/time/FastDateParserTest.java
+++ b/src/test/java/org/apache/commons/lang3/time/FastDateParserTest.java
@@ -45,32 +45,101 @@ import org.junit.jupiter.api.Test;
  * @since 3.2
  */
 public class FastDateParserTest {
+    private enum Expected1806 {
+        India(INDIA, "+05", "+0530", "+05:30", true),
+        Greenwich(GMT, "Z", "Z", "Z", false),
+        NewYork(NEW_YORK, "-05", "-0500", "-05:00", false);
+
+        final TimeZone zone;
+
+        final String one;
+        final String two;
+        final String three;
+        final long offset;
+        Expected1806(final TimeZone zone, final String one, final String two, 
final String three, final boolean hasHalfHourOffset) {
+            this.zone = zone;
+            this.one = one;
+            this.two = two;
+            this.three = three;
+            this.offset = hasHalfHourOffset ?30*60*1000 :0;
+        }
+    }
     private static final String SHORT_FORMAT_NOERA = "y/M/d/h/a/m/s/E";
     private static final String LONG_FORMAT_NOERA = 
"yyyy/MMMM/dddd/hhhh/mmmm/ss/aaaa/EEEE";
     private static final String SHORT_FORMAT = "G/" + SHORT_FORMAT_NOERA;
-    private static final String LONG_FORMAT = "GGGG/" + LONG_FORMAT_NOERA;
 
+    private static final String LONG_FORMAT = "GGGG/" + LONG_FORMAT_NOERA;
     private static final String yMdHmsSZ = "yyyy-MM-dd'T'HH:mm:ss.SSS Z";
     private static final String DMY_DOT = "dd.MM.yyyy";
     private static final String YMD_SLASH = "yyyy/MM/dd";
     private static final String MDY_DASH = "MM-DD-yyyy";
-    private static final String MDY_SLASH = "MM/DD/yyyy";
 
+    private static final String MDY_SLASH = "MM/DD/yyyy";
     private static final TimeZone REYKJAVIK = 
TimeZone.getTimeZone("Atlantic/Reykjavik");
     private static final TimeZone NEW_YORK = 
TimeZone.getTimeZone("America/New_York");
     private static final TimeZone GMT = TimeZone.getTimeZone("GMT");
+
     private static final TimeZone INDIA = 
TimeZone.getTimeZone("Asia/Calcutta");
 
     private static final Locale SWEDEN = new Locale("sv", "SE");
 
-    DateParser getInstance(final String format) {
-        return getInstance(format, TimeZone.getDefault(), Locale.getDefault());
+    private static Calendar initializeCalendar(final TimeZone tz) {
+        final Calendar cal = Calendar.getInstance(tz);
+        cal.set(Calendar.YEAR, 2001);
+        cal.set(Calendar.MONTH, 1); // not daylight savings
+        cal.set(Calendar.DAY_OF_MONTH, 4);
+        cal.set(Calendar.HOUR_OF_DAY, 12);
+        cal.set(Calendar.MINUTE, 8);
+        cal.set(Calendar.SECOND, 56);
+        cal.set(Calendar.MILLISECOND, 235);
+        return cal;
+    }
+
+    private void checkParse(final Locale locale, final Calendar cal, final 
SimpleDateFormat sdf, final DateParser fdf) throws ParseException {
+        final String formattedDate= sdf.format(cal.getTime());
+        checkParse(locale, sdf, fdf, formattedDate);
+        checkParse(locale, sdf, fdf, formattedDate.toLowerCase(locale));
+        checkParse(locale, sdf, fdf, formattedDate.toUpperCase(locale));
+    }
+
+    private void checkParse(final Locale locale, final SimpleDateFormat sdf, 
final DateParser fdf, final String formattedDate) throws ParseException {
+        try {
+            final Date expectedTime = sdf.parse(formattedDate);
+            final Date actualTime = fdf.parse(formattedDate);
+            assertEquals(expectedTime, actualTime, "locale : " + locale + " 
formattedDate : " + formattedDate + "\n");
+        } catch (Exception e) {
+            fail("locale : " + locale + " formattedDate : " + formattedDate + 
" error : " + e + "\n", e);
+        }
     }
 
     private DateParser getDateInstance(final int dateStyle, final Locale 
locale) {
         return 
getInstance(FormatCache.getPatternForStyle(Integer.valueOf(dateStyle), null, 
locale), TimeZone.getDefault(), Locale.getDefault());
     }
 
+    private Calendar getEraStart(int year, final TimeZone zone, final Locale 
locale) {
+        final Calendar cal = Calendar.getInstance(zone, locale);
+        cal.clear();
+
+        // 
http://docs.oracle.com/javase/6/docs/technotes/guides/intl/calendar.doc.html
+        if (locale.equals(FastDateParser.JAPANESE_IMPERIAL)) {
+            if (year < 1868) {
+                cal.set(Calendar.ERA, 0);
+                cal.set(Calendar.YEAR, 1868-year);
+            }
+        } else {
+            if (year < 0) {
+                cal.set(Calendar.ERA, GregorianCalendar.BC);
+                year= -year;
+            }
+            cal.set(Calendar.YEAR, year/100 * 100);
+        }
+        return cal;
+    }
+
+    DateParser getInstance(final String format) {
+        return getInstance(format, TimeZone.getDefault(), Locale.getDefault());
+    }
+
     private DateParser getInstance(final String format, final Locale locale) {
         return getInstance(format, TimeZone.getDefault(), locale);
     }
@@ -93,6 +162,29 @@ public class FastDateParserTest {
     }
 
     @Test
+    public void java15BuggyLocaleTest() throws ParseException {
+        final String buggyLocaleName = "ff_LR_#Adlm";
+        Locale buggyLocale = null;
+        for (final Locale locale : Locale.getAvailableLocales()) {
+            if (buggyLocaleName.equals(locale.toString())) {
+                buggyLocale = locale;
+                break;
+            }
+        }
+        if (buggyLocale == null) {
+            return;
+        }
+        testSingleLocale(buggyLocale);
+    }
+
+    @Test
+    public void java15BuggyLocaleTestAll() throws ParseException {
+        for (final Locale locale : Locale.getAvailableLocales()) {
+            testSingleLocale(locale);
+        }
+    }
+
+    @Test
     public void test_Equality_Hash() {
         final DateParser[] parsers= {
             getInstance(yMdHmsSZ, NEW_YORK, Locale.US),
@@ -116,51 +208,31 @@ public class FastDateParserTest {
         }
     }
 
-    @Test
-    public void testParseZone() throws ParseException {
-        final Calendar cal= Calendar.getInstance(NEW_YORK, Locale.US);
-        cal.clear();
-        cal.set(2003, Calendar.JULY, 10, 16, 33, 20);
 
-        final DateParser fdf = getInstance(yMdHmsSZ, NEW_YORK, Locale.US);
+    @Test
+    public void test1806() throws ParseException {
+        final String formatStub = "yyyy-MM-dd'T'HH:mm:ss.SSS";
+        final String dateStub = "2001-02-04T12:08:56.235";
 
-        assertEquals(cal.getTime(), fdf.parse("2003-07-10T15:33:20.000 
-0500"));
-        assertEquals(cal.getTime(), fdf.parse("2003-07-10T15:33:20.000 
GMT-05:00"));
-        assertEquals(cal.getTime(), fdf.parse("2003-07-10T16:33:20.000 Eastern 
Daylight Time"));
-        assertEquals(cal.getTime(), fdf.parse("2003-07-10T16:33:20.000 EDT"));
+        for (final Expected1806 trial : Expected1806.values()) {
+            final Calendar cal = initializeCalendar(trial.zone);
 
-        cal.setTimeZone(TimeZone.getTimeZone("GMT-3"));
-        cal.set(2003, Calendar.FEBRUARY, 10, 9, 0, 0);
+            final String message = trial.zone.getDisplayName()+";";
 
-        assertEquals(cal.getTime(), fdf.parse("2003-02-10T09:00:00.000 
-0300"));
+            DateParser parser = getInstance(formatStub+"X", trial.zone);
+            assertEquals(cal.getTime().getTime(), 
parser.parse(dateStub+trial.one).getTime()-trial.offset, message+trial.one);
 
-        cal.setTimeZone(TimeZone.getTimeZone("GMT+5"));
-        cal.set(2003, Calendar.FEBRUARY, 10, 15, 5, 6);
+            parser = getInstance(formatStub+"XX", trial.zone);
+            assertEquals(cal.getTime(), parser.parse(dateStub+trial.two), 
message+trial.two);
 
-        assertEquals(cal.getTime(), fdf.parse("2003-02-10T15:05:06.000 
+0500"));
+            parser = getInstance(formatStub+"XXX", trial.zone);
+            assertEquals(cal.getTime(), parser.parse(dateStub+trial.three), 
message+trial.three);
+        }
     }
 
     @Test
-    public void testParseLongShort() throws ParseException {
-        final Calendar cal= Calendar.getInstance(NEW_YORK, Locale.US);
-        cal.clear();
-        cal.set(2003, Calendar.FEBRUARY, 10, 15, 33, 20);
-        cal.set(Calendar.MILLISECOND, 989);
-        cal.setTimeZone(NEW_YORK);
-
-        DateParser fdf = getInstance("yyyy GGGG MMMM dddd aaaa EEEE HHHH mmmm 
ssss SSSS ZZZZ", NEW_YORK, Locale.US);
-
-        assertEquals(cal.getTime(), fdf.parse("2003 AD February 0010 PM Monday 
0015 0033 0020 0989 GMT-05:00"));
-        cal.set(Calendar.ERA, GregorianCalendar.BC);
-
-        final Date parse = fdf.parse("2003 BC February 0010 PM Saturday 0015 
0033 0020 0989 GMT-05:00");
-                assertEquals(cal.getTime(), parse);
-
-        fdf = getInstance("y G M d a E H m s S Z", NEW_YORK, Locale.US);
-        assertEquals(cal.getTime(), fdf.parse("03 BC 2 10 PM Sat 15 33 20 989 
-0500"));
-
-        cal.set(Calendar.ERA, GregorianCalendar.AD);
-        assertEquals(cal.getTime(), fdf.parse("03 AD 2 10 PM Saturday 15 33 20 
989 -0500"));
+    public void test1806Argument() {
+        assertThrows(IllegalArgumentException.class, () -> 
getInstance("XXXX"));
     }
 
     @Test
@@ -198,126 +270,146 @@ public class FastDateParserTest {
         assertEquals(cal.getTime(), H.parse("2010-08-01 12:33:20"));
     }
 
-    private Calendar getEraStart(int year, final TimeZone zone, final Locale 
locale) {
-        final Calendar cal = Calendar.getInstance(zone, locale);
-        cal.clear();
+    @Test
+    public void testDayNumberOfWeek() throws ParseException {
+        final DateParser parser = getInstance("u");
+        final Calendar calendar = Calendar.getInstance();
 
-        // 
http://docs.oracle.com/javase/6/docs/technotes/guides/intl/calendar.doc.html
-        if (locale.equals(FastDateParser.JAPANESE_IMPERIAL)) {
-            if (year < 1868) {
-                cal.set(Calendar.ERA, 0);
-                cal.set(Calendar.YEAR, 1868-year);
-            }
-        } else {
-            if (year < 0) {
-                cal.set(Calendar.ERA, GregorianCalendar.BC);
-                year= -year;
-            }
-            cal.set(Calendar.YEAR, year/100 * 100);
-        }
-        return cal;
-    }
+        calendar.setTime(parser.parse("1"));
+        assertEquals(Calendar.MONDAY, calendar.get(Calendar.DAY_OF_WEEK));
 
-    private void validateSdfFormatFdpParseEquality(final String format, final 
Locale locale, final TimeZone tz, final DateParser fdp, final Date in, final 
int year, final Date cs) throws ParseException {
-        final SimpleDateFormat sdf = new SimpleDateFormat(format, locale);
-        sdf.setTimeZone(tz);
-        if (format.equals(SHORT_FORMAT)) {
-            sdf.set2DigitYearStart( cs );
-        }
-        final String fmt = sdf.format(in);
-        try {
-            final Date out = fdp.parse(fmt);
-            assertEquals(in, out, locale.toString()+" "+in+" "+ format+ " 
"+tz.getID());
-        } catch (final ParseException pe) {
-            if (year >= 1868 || !locale.getCountry().equals("JP")) {// LANG-978
-                throw pe;
-            }
-        }
+        calendar.setTime(parser.parse("6"));
+        assertEquals(Calendar.SATURDAY, calendar.get(Calendar.DAY_OF_WEEK));
+
+        calendar.setTime(parser.parse("7"));
+        assertEquals(Calendar.SUNDAY, calendar.get(Calendar.DAY_OF_WEEK));
     }
 
     @Test
-    // Check that all Locales can parse the formats we use
-    public void testParses() throws Exception {
-        for (final String format : new String[]{LONG_FORMAT, SHORT_FORMAT}) {
-            for (final Locale locale : Locale.getAvailableLocales()) {
-                for (final TimeZone tz :  new TimeZone[]{NEW_YORK, REYKJAVIK, 
GMT}) {
-                     for (final int year : new int[]{2003, 1940, 1868, 1867, 
1, -1, -1940}) {
-                        final Calendar cal= getEraStart(year, tz, locale);
-                        final Date centuryStart= cal.getTime();
-
-                        cal.set(Calendar.MONTH, 1);
-                        cal.set(Calendar.DAY_OF_MONTH, 10);
-                        final Date in= cal.getTime();
+    public void testDayOf() throws ParseException {
+        final Calendar cal= Calendar.getInstance(NEW_YORK, Locale.US);
+        cal.clear();
+        cal.set(2003, Calendar.FEBRUARY, 10);
 
-                        final FastDateParser fdp= new FastDateParser(format, 
tz, locale, centuryStart);
-                        validateSdfFormatFdpParseEquality(format, locale, tz, 
fdp, in, year, centuryStart);
-                    }
-                }
-            }
-        }
+        final DateParser fdf = getInstance("W w F D y", NEW_YORK, Locale.US);
+        assertEquals(cal.getTime(), fdf.parse("3 7 2 41 03"));
     }
 
-    // we cannot use historic dates to test timezone parsing, some timezones 
have second offsets
-    // as well as hours and minutes which makes the z formats a low fidelity 
round trip
     @Test
-    public void testTzParses() throws Exception {
-        // Check that all Locales can parse the time formats we use
-        for (final Locale locale : Locale.getAvailableLocales()) {
-            final FastDateParser fdp= new FastDateParser("yyyy/MM/dd z", 
TimeZone.getDefault(), locale);
+    public void testEquals() {
+        final DateParser parser1= getInstance(YMD_SLASH);
+        final DateParser parser2= getInstance(YMD_SLASH);
 
-            for (final TimeZone tz :  new TimeZone[]{NEW_YORK, REYKJAVIK, 
GMT}) {
-                final Calendar cal= Calendar.getInstance(tz, locale);
-                cal.clear();
-                cal.set(Calendar.YEAR, 2000);
-                cal.set(Calendar.MONTH, 1);
-                cal.set(Calendar.DAY_OF_MONTH, 10);
-                final Date expected= cal.getTime();
+        assertEquals(parser1, parser2);
+        assertEquals(parser1.hashCode(), parser2.hashCode());
 
-                final Date actual = fdp.parse("2000/02/10 
"+tz.getDisplayName(locale));
-                assertEquals(expected, actual, "tz:"+tz.getID()+" 
locale:"+locale.getDisplayName());
-            }
-        }
+        assertNotEquals(parser1, new Object());
     }
 
-
     @Test
-    public void testLocales_Long_AD() throws Exception {
-        testLocales(LONG_FORMAT, false);
-    }
+    public void testJpLocales() throws ParseException {
 
-    @Test
-    public void testLocales_Long_BC() throws Exception {
-        testLocales(LONG_FORMAT, true);
-    }
+        final Calendar cal= Calendar.getInstance(GMT);
+        cal.clear();
+        cal.set(2003, Calendar.FEBRUARY, 10);
+        cal.set(Calendar.ERA, GregorianCalendar.BC);
+
+        final Locale locale = LocaleUtils.toLocale("zh");
+        // ja_JP_JP cannot handle dates before 1868 properly
+
+        final SimpleDateFormat sdf = new SimpleDateFormat(LONG_FORMAT, locale);
+        final DateParser fdf = getInstance(LONG_FORMAT, locale);
+
+        // If parsing fails, a ParseException will be thrown and the test will 
fail
+        checkParse(locale, cal, sdf, fdf);
+    }
 
     @Test
-    public void testLocales_Short_AD() throws Exception {
-        testLocales(SHORT_FORMAT, false);
+    public void testLANG_831() throws Exception {
+        testSdfAndFdp("M E", "3  Tue", true);
     }
 
     @Test
-    public void testLocales_Short_BC() throws Exception {
-        testLocales(SHORT_FORMAT, true);
+    public void testLANG_832() throws Exception {
+        testSdfAndFdp("'d'd", "d3", false); // OK
+        testSdfAndFdp("'d'd'", "d3", true); // should fail (unterminated quote)
     }
 
     @Test
-    public void testLocales_LongNoEra_AD() throws Exception {
-        testLocales(LONG_FORMAT_NOERA, false);
+    public void testLang1121() throws ParseException {
+        final TimeZone kst = TimeZone.getTimeZone("KST");
+        final DateParser fdp = getInstance("yyyyMMdd", kst, Locale.KOREA);
+
+        assertThrows(ParseException.class, () -> fdp.parse("2015"));
+
+        // Wed Apr 29 00:00:00 KST 2015
+        Date actual = fdp.parse("20150429");
+        final Calendar cal = Calendar.getInstance(kst, Locale.KOREA);
+        cal.clear();
+        cal.set(2015, 3, 29);
+        Date expected = cal.getTime();
+        assertEquals(expected, actual);
+
+        final SimpleDateFormat df = new SimpleDateFormat("yyyyMMdd", 
Locale.KOREA);
+        df.setTimeZone(kst);
+        expected = df.parse("20150429113100");
+
+        // Thu Mar 16 00:00:00 KST 81724
+        actual = fdp.parse("20150429113100");
+        assertEquals(expected, actual);
     }
 
     @Test
-    public void testLocales_LongNoEra_BC() throws Exception {
-        testLocales(LONG_FORMAT_NOERA, true);
+    public void testLang1380() throws ParseException {
+        final Calendar expected = Calendar.getInstance(GMT, Locale.FRANCE);
+        expected.clear();
+        expected.set(2014, Calendar.APRIL, 14);
+
+        final DateParser fdp = getInstance("dd MMM yyyy", GMT, Locale.FRANCE);
+        assertEquals(expected.getTime(), fdp.parse("14 avril 2014"));
+        assertEquals(expected.getTime(), fdp.parse("14 avr. 2014"));
+        assertEquals(expected.getTime(), fdp.parse("14 avr 2014"));
     }
 
     @Test
-    public void testLocales_ShortNoEra_AD() throws Exception {
-        testLocales(SHORT_FORMAT_NOERA, false);
+    public void testLang303() throws ParseException {
+        DateParser parser = getInstance(YMD_SLASH);
+        final Calendar cal = Calendar.getInstance();
+        cal.set(2004, Calendar.DECEMBER, 31);
+
+        final Date date = parser.parse("2004/11/31");
+
+        parser = 
SerializationUtils.deserialize(SerializationUtils.serialize((Serializable) 
parser));
+        assertEquals(date, parser.parse("2004/11/31"));
     }
 
     @Test
-    public void testLocales_ShortNoEra_BC() throws Exception {
-        testLocales(SHORT_FORMAT_NOERA, true);
+    public void testLang538() throws ParseException {
+        final DateParser parser = getInstance("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", 
GMT);
+
+        final Calendar cal = 
Calendar.getInstance(TimeZone.getTimeZone("GMT-8"));
+        cal.clear();
+        cal.set(2009, Calendar.OCTOBER, 16, 8, 42, 16);
+
+        assertEquals(cal.getTime(), parser.parse("2009-10-16T16:42:16.000Z"));
+    }
+
+    @Test
+    public void testLang996() throws ParseException {
+        final Calendar expected = Calendar.getInstance(NEW_YORK, Locale.US);
+        expected.clear();
+        expected.set(2014, Calendar.MAY, 14);
+
+        final DateParser fdp = getInstance("ddMMMyyyy", NEW_YORK, Locale.US);
+        assertEquals(expected.getTime(), fdp.parse("14may2014"));
+        assertEquals(expected.getTime(), fdp.parse("14MAY2014"));
+        assertEquals(expected.getTime(), fdp.parse("14May2014"));
+    }
+
+    @Test
+    public void testLocaleMatches() {
+        final DateParser parser= getInstance(yMdHmsSZ, SWEDEN);
+        assertEquals(SWEDEN, parser.getLocale());
     }
 
     private void testLocales(final String format, final boolean eraBC) throws 
Exception {
@@ -343,150 +435,43 @@ public class FastDateParserTest {
     }
 
     @Test
-    public void testJpLocales() throws ParseException {
-
-        final Calendar cal= Calendar.getInstance(GMT);
-        cal.clear();
-        cal.set(2003, Calendar.FEBRUARY, 10);
-        cal.set(Calendar.ERA, GregorianCalendar.BC);
-
-        final Locale locale = LocaleUtils.toLocale("zh");
-        // ja_JP_JP cannot handle dates before 1868 properly
-
-        final SimpleDateFormat sdf = new SimpleDateFormat(LONG_FORMAT, locale);
-        final DateParser fdf = getInstance(LONG_FORMAT, locale);
-
-        // If parsing fails, a ParseException will be thrown and the test will 
fail
-        checkParse(locale, cal, sdf, fdf);
-    }
-
-    private void checkParse(final Locale locale, final Calendar cal, final 
SimpleDateFormat sdf, final DateParser fdf) throws ParseException {
-        final String formattedDate= sdf.format(cal.getTime());
-        checkParse(locale, sdf, fdf, formattedDate);
-        checkParse(locale, sdf, fdf, formattedDate.toLowerCase(locale));
-        checkParse(locale, sdf, fdf, formattedDate.toUpperCase(locale));
-    }
-
-    private void checkParse(final Locale locale, final SimpleDateFormat sdf, 
final DateParser fdf, final String formattedDate) throws ParseException {
-        try {
-            final Date expectedTime = sdf.parse(formattedDate);
-            final Date actualTime = fdf.parse(formattedDate);
-            assertEquals(expectedTime, actualTime, "locale : " + locale + " 
formattedDate : " + formattedDate + "\n");
-        } catch (Exception e) {
-            fail("locale : " + locale + " formattedDate : " + formattedDate + 
" error : " + e + "\n", e);
-        }
+    public void testLocales_Long_AD() throws Exception {
+        testLocales(LONG_FORMAT, false);
     }
 
     @Test
-    public void testParseNumerics() throws ParseException {
-        final Calendar cal= Calendar.getInstance(NEW_YORK, Locale.US);
-        cal.clear();
-        cal.set(2003, Calendar.FEBRUARY, 10, 15, 33, 20);
-        cal.set(Calendar.MILLISECOND, 989);
-
-        final DateParser fdf = getInstance("yyyyMMddHHmmssSSS", NEW_YORK, 
Locale.US);
-        assertEquals(cal.getTime(), fdf.parse("20030210153320989"));
+    public void testLocales_Long_BC() throws Exception {
+        testLocales(LONG_FORMAT, true);
     }
 
     @Test
-    public void testQuotes() throws ParseException {
-        final Calendar cal= Calendar.getInstance(NEW_YORK, Locale.US);
-        cal.clear();
-        cal.set(2003, Calendar.FEBRUARY, 10, 15, 33, 20);
-        cal.set(Calendar.MILLISECOND, 989);
-
-        final DateParser fdf = getInstance("''yyyyMMdd'A''B'HHmmssSSS''", 
NEW_YORK, Locale.US);
-        assertEquals(cal.getTime(), fdf.parse("'20030210A'B153320989'"));
+    public void testLocales_LongNoEra_AD() throws Exception {
+        testLocales(LONG_FORMAT_NOERA, false);
     }
 
     @Test
-    public void testSpecialCharacters() throws Exception {
-        testSdfAndFdp("q", "", true); // bad pattern character (at present)
-        testSdfAndFdp("Q", "", true); // bad pattern character
-        testSdfAndFdp("$", "$", false); // OK
-        testSdfAndFdp("?.d", "?.12", false); // OK
-        testSdfAndFdp("''yyyyMMdd'A''B'HHmmssSSS''", "'20030210A'B153320989'", 
false); // OK
-        testSdfAndFdp("''''yyyyMMdd'A''B'HHmmssSSS''", 
"''20030210A'B153320989'", false); // OK
-        testSdfAndFdp("'$\\Ed'", "$\\Ed", false); // OK
-
-        // quoted charaters are case sensitive
-        testSdfAndFdp("'QED'", "QED", false);
-        testSdfAndFdp("'QED'", "qed", true);
-        // case sensitive after insensitive Month field
-        testSdfAndFdp("yyyy-MM-dd 'QED'", "2003-02-10 QED", false);
-        testSdfAndFdp("yyyy-MM-dd 'QED'", "2003-02-10 qed", true);
+    public void testLocales_LongNoEra_BC() throws Exception {
+        testLocales(LONG_FORMAT_NOERA, true);
     }
 
     @Test
-    public void testLANG_832() throws Exception {
-        testSdfAndFdp("'d'd", "d3", false); // OK
-        testSdfAndFdp("'d'd'", "d3", true); // should fail (unterminated quote)
+    public void testLocales_Short_AD() throws Exception {
+        testLocales(SHORT_FORMAT, false);
     }
 
     @Test
-    public void testLANG_831() throws Exception {
-        testSdfAndFdp("M E", "3  Tue", true);
-    }
-
-    private void testSdfAndFdp(final String format, final String date, final 
boolean shouldFail)
-            throws Exception {
-        Date dfdp = null;
-        Date dsdf = null;
-        Throwable f = null;
-        Throwable s = null;
-
-        try {
-            final SimpleDateFormat sdf = new SimpleDateFormat(format, 
Locale.US);
-            sdf.setTimeZone(NEW_YORK);
-            dsdf = sdf.parse(date);
-            assertFalse(shouldFail, "Expected SDF failure, but got " + dsdf + 
" for ["+format+", "+date+"]");
-        } catch (final Exception e) {
-            s = e;
-            if (!shouldFail) {
-                throw e;
-            }
-        }
-
-        try {
-            final DateParser fdp = getInstance(format, NEW_YORK, Locale.US);
-            dfdp = fdp.parse(date);
-            assertFalse(shouldFail, "Expected FDF failure, but got " + dfdp + 
" for ["+format+", "+date+"]");
-        } catch (final Exception e) {
-            f = e;
-            if (!shouldFail) {
-                throw e;
-            }
-        }
-        // SDF and FDF should produce equivalent results
-        assertEquals((f == null), (s == null), "Should both or neither throw 
Exceptions");
-        assertEquals(dsdf, dfdp, "Parsed dates should be equal");
+    public void testLocales_Short_BC() throws Exception {
+        testLocales(SHORT_FORMAT, true);
     }
 
     @Test
-    public void testDayOf() throws ParseException {
-        final Calendar cal= Calendar.getInstance(NEW_YORK, Locale.US);
-        cal.clear();
-        cal.set(2003, Calendar.FEBRUARY, 10);
-
-        final DateParser fdf = getInstance("W w F D y", NEW_YORK, Locale.US);
-        assertEquals(cal.getTime(), fdf.parse("3 7 2 41 03"));
+    public void testLocales_ShortNoEra_AD() throws Exception {
+        testLocales(SHORT_FORMAT_NOERA, false);
     }
 
-    /**
-     * Test case for {@link FastDateParser#FastDateParser(String, TimeZone, 
Locale)}.
-     * @throws ParseException so we don't have to catch it
-     */
     @Test
-    public void testShortDateStyleWithLocales() throws ParseException {
-        DateParser fdf = getDateInstance(FastDateFormat.SHORT, Locale.US);
-        final Calendar cal = Calendar.getInstance();
-        cal.clear();
-
-        cal.set(2004, Calendar.FEBRUARY, 3);
-        assertEquals(cal.getTime(), fdf.parse("2/3/04"));
-
-        fdf = getDateInstance(FastDateFormat.SHORT, SWEDEN);
-        assertEquals(cal.getTime(), fdf.parse("2004-02-03"));
+    public void testLocales_ShortNoEra_BC() throws Exception {
+        testLocales(SHORT_FORMAT_NOERA, true);
     }
 
     /**
@@ -520,226 +505,241 @@ public class FastDateParserTest {
     }
 
     @Test
-    public void testLang303() throws ParseException {
-        DateParser parser = getInstance(YMD_SLASH);
-        final Calendar cal = Calendar.getInstance();
-        cal.set(2004, Calendar.DECEMBER, 31);
+    public void testParseLongShort() throws ParseException {
+        final Calendar cal= Calendar.getInstance(NEW_YORK, Locale.US);
+        cal.clear();
+        cal.set(2003, Calendar.FEBRUARY, 10, 15, 33, 20);
+        cal.set(Calendar.MILLISECOND, 989);
+        cal.setTimeZone(NEW_YORK);
 
-        final Date date = parser.parse("2004/11/31");
+        DateParser fdf = getInstance("yyyy GGGG MMMM dddd aaaa EEEE HHHH mmmm 
ssss SSSS ZZZZ", NEW_YORK, Locale.US);
 
-        parser = 
SerializationUtils.deserialize(SerializationUtils.serialize((Serializable) 
parser));
-        assertEquals(date, parser.parse("2004/11/31"));
+        assertEquals(cal.getTime(), fdf.parse("2003 AD February 0010 PM Monday 
0015 0033 0020 0989 GMT-05:00"));
+        cal.set(Calendar.ERA, GregorianCalendar.BC);
+
+        final Date parse = fdf.parse("2003 BC February 0010 PM Saturday 0015 
0033 0020 0989 GMT-05:00");
+                assertEquals(cal.getTime(), parse);
+
+        fdf = getInstance("y G M d a E H m s S Z", NEW_YORK, Locale.US);
+        assertEquals(cal.getTime(), fdf.parse("03 BC 2 10 PM Sat 15 33 20 989 
-0500"));
+
+        cal.set(Calendar.ERA, GregorianCalendar.AD);
+        assertEquals(cal.getTime(), fdf.parse("03 AD 2 10 PM Saturday 15 33 20 
989 -0500"));
     }
 
     @Test
-    public void testLang538() throws ParseException {
-        final DateParser parser = getInstance("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", 
GMT);
-
-        final Calendar cal = 
Calendar.getInstance(TimeZone.getTimeZone("GMT-8"));
+    public void testParseNumerics() throws ParseException {
+        final Calendar cal= Calendar.getInstance(NEW_YORK, Locale.US);
         cal.clear();
-        cal.set(2009, Calendar.OCTOBER, 16, 8, 42, 16);
+        cal.set(2003, Calendar.FEBRUARY, 10, 15, 33, 20);
+        cal.set(Calendar.MILLISECOND, 989);
 
-        assertEquals(cal.getTime(), parser.parse("2009-10-16T16:42:16.000Z"));
+        final DateParser fdf = getInstance("yyyyMMddHHmmssSSS", NEW_YORK, 
Locale.US);
+        assertEquals(cal.getTime(), fdf.parse("20030210153320989"));
     }
 
     @Test
-    public void testEquals() {
-        final DateParser parser1= getInstance(YMD_SLASH);
-        final DateParser parser2= getInstance(YMD_SLASH);
-
-        assertEquals(parser1, parser2);
-        assertEquals(parser1.hashCode(), parser2.hashCode());
-
-        assertNotEquals(parser1, new Object());
-    }
+    public void testParseOffset() {
+        final DateParser parser = getInstance(YMD_SLASH);
+        final Date date = parser.parse("Today is 2015/07/04", new 
ParsePosition(9));
 
-    @Test
-    public void testToStringContainsName() {
-        final DateParser parser= getInstance(YMD_SLASH);
-        assertTrue(parser.toString().startsWith("FastDate"));
+        final Calendar cal = Calendar.getInstance();
+        cal.clear();
+        cal.set(2015, Calendar.JULY, 4);
+        assertEquals(cal.getTime(), date);
     }
 
     @Test
-    public void testPatternMatches() {
-        final DateParser parser= getInstance(yMdHmsSZ);
-        assertEquals(yMdHmsSZ, parser.getPattern());
-    }
+    // Check that all Locales can parse the formats we use
+    public void testParses() throws Exception {
+        for (final String format : new String[]{LONG_FORMAT, SHORT_FORMAT}) {
+            for (final Locale locale : Locale.getAvailableLocales()) {
+                for (final TimeZone tz :  new TimeZone[]{NEW_YORK, REYKJAVIK, 
GMT}) {
+                     for (final int year : new int[]{2003, 1940, 1868, 1867, 
1, -1, -1940}) {
+                        final Calendar cal= getEraStart(year, tz, locale);
+                        final Date centuryStart= cal.getTime();
 
-    @Test
-    public void testLocaleMatches() {
-        final DateParser parser= getInstance(yMdHmsSZ, SWEDEN);
-        assertEquals(SWEDEN, parser.getLocale());
-    }
+                        cal.set(Calendar.MONTH, 1);
+                        cal.set(Calendar.DAY_OF_MONTH, 10);
+                        final Date in= cal.getTime();
 
-    @Test
-    public void testTimeZoneMatches() {
-        final DateParser parser= getInstance(yMdHmsSZ, REYKJAVIK);
-        assertEquals(REYKJAVIK, parser.getTimeZone());
+                        final FastDateParser fdp= new FastDateParser(format, 
tz, locale, centuryStart);
+                        validateSdfFormatFdpParseEquality(format, locale, tz, 
fdp, in, year, centuryStart);
+                    }
+                }
+            }
+        }
     }
 
     @Test
-    public void testLang996() throws ParseException {
-        final Calendar expected = Calendar.getInstance(NEW_YORK, Locale.US);
-        expected.clear();
-        expected.set(2014, Calendar.MAY, 14);
+    public void testParseZone() throws ParseException {
+        final Calendar cal= Calendar.getInstance(NEW_YORK, Locale.US);
+        cal.clear();
+        cal.set(2003, Calendar.JULY, 10, 16, 33, 20);
 
-        final DateParser fdp = getInstance("ddMMMyyyy", NEW_YORK, Locale.US);
-        assertEquals(expected.getTime(), fdp.parse("14may2014"));
-        assertEquals(expected.getTime(), fdp.parse("14MAY2014"));
-        assertEquals(expected.getTime(), fdp.parse("14May2014"));
-    }
+        final DateParser fdf = getInstance(yMdHmsSZ, NEW_YORK, Locale.US);
 
-    @Test
-    public void test1806Argument() {
-        assertThrows(IllegalArgumentException.class, () -> 
getInstance("XXXX"));
-    }
+        assertEquals(cal.getTime(), fdf.parse("2003-07-10T15:33:20.000 
-0500"));
+        assertEquals(cal.getTime(), fdf.parse("2003-07-10T15:33:20.000 
GMT-05:00"));
+        assertEquals(cal.getTime(), fdf.parse("2003-07-10T16:33:20.000 Eastern 
Daylight Time"));
+        assertEquals(cal.getTime(), fdf.parse("2003-07-10T16:33:20.000 EDT"));
 
-    private static Calendar initializeCalendar(final TimeZone tz) {
-        final Calendar cal = Calendar.getInstance(tz);
-        cal.set(Calendar.YEAR, 2001);
-        cal.set(Calendar.MONTH, 1); // not daylight savings
-        cal.set(Calendar.DAY_OF_MONTH, 4);
-        cal.set(Calendar.HOUR_OF_DAY, 12);
-        cal.set(Calendar.MINUTE, 8);
-        cal.set(Calendar.SECOND, 56);
-        cal.set(Calendar.MILLISECOND, 235);
-        return cal;
-    }
+        cal.setTimeZone(TimeZone.getTimeZone("GMT-3"));
+        cal.set(2003, Calendar.FEBRUARY, 10, 9, 0, 0);
 
-    private enum Expected1806 {
-        India(INDIA, "+05", "+0530", "+05:30", true),
-        Greenwich(GMT, "Z", "Z", "Z", false),
-        NewYork(NEW_YORK, "-05", "-0500", "-05:00", false);
+        assertEquals(cal.getTime(), fdf.parse("2003-02-10T09:00:00.000 
-0300"));
 
-        Expected1806(final TimeZone zone, final String one, final String two, 
final String three, final boolean hasHalfHourOffset) {
-            this.zone = zone;
-            this.one = one;
-            this.two = two;
-            this.three = three;
-            this.offset = hasHalfHourOffset ?30*60*1000 :0;
-        }
+        cal.setTimeZone(TimeZone.getTimeZone("GMT+5"));
+        cal.set(2003, Calendar.FEBRUARY, 10, 15, 5, 6);
 
-        final TimeZone zone;
-        final String one;
-        final String two;
-        final String three;
-        final long offset;
+        assertEquals(cal.getTime(), fdf.parse("2003-02-10T15:05:06.000 
+0500"));
     }
 
     @Test
-    public void test1806() throws ParseException {
-        final String formatStub = "yyyy-MM-dd'T'HH:mm:ss.SSS";
-        final String dateStub = "2001-02-04T12:08:56.235";
+    public void testPatternMatches() {
+        final DateParser parser= getInstance(yMdHmsSZ);
+        assertEquals(yMdHmsSZ, parser.getPattern());
+    }
 
-        for (final Expected1806 trial : Expected1806.values()) {
-            final Calendar cal = initializeCalendar(trial.zone);
+    @Test
+    public void testQuotes() throws ParseException {
+        final Calendar cal= Calendar.getInstance(NEW_YORK, Locale.US);
+        cal.clear();
+        cal.set(2003, Calendar.FEBRUARY, 10, 15, 33, 20);
+        cal.set(Calendar.MILLISECOND, 989);
 
-            final String message = trial.zone.getDisplayName()+";";
+        final DateParser fdf = getInstance("''yyyyMMdd'A''B'HHmmssSSS''", 
NEW_YORK, Locale.US);
+        assertEquals(cal.getTime(), fdf.parse("'20030210A'B153320989'"));
+    }
 
-            DateParser parser = getInstance(formatStub+"X", trial.zone);
-            assertEquals(cal.getTime().getTime(), 
parser.parse(dateStub+trial.one).getTime()-trial.offset, message+trial.one);
+    private void testSdfAndFdp(final String format, final String date, final 
boolean shouldFail)
+            throws Exception {
+        Date dfdp = null;
+        Date dsdf = null;
+        Throwable f = null;
+        Throwable s = null;
 
-            parser = getInstance(formatStub+"XX", trial.zone);
-            assertEquals(cal.getTime(), parser.parse(dateStub+trial.two), 
message+trial.two);
+        try {
+            final SimpleDateFormat sdf = new SimpleDateFormat(format, 
Locale.US);
+            sdf.setTimeZone(NEW_YORK);
+            dsdf = sdf.parse(date);
+            assertFalse(shouldFail, "Expected SDF failure, but got " + dsdf + 
" for ["+format+", "+date+"]");
+        } catch (final Exception e) {
+            s = e;
+            if (!shouldFail) {
+                throw e;
+            }
+        }
 
-            parser = getInstance(formatStub+"XXX", trial.zone);
-            assertEquals(cal.getTime(), parser.parse(dateStub+trial.three), 
message+trial.three);
+        try {
+            final DateParser fdp = getInstance(format, NEW_YORK, Locale.US);
+            dfdp = fdp.parse(date);
+            assertFalse(shouldFail, "Expected FDF failure, but got " + dfdp + 
" for ["+format+", "+date+"]");
+        } catch (final Exception e) {
+            f = e;
+            if (!shouldFail) {
+                throw e;
+            }
         }
+        // SDF and FDF should produce equivalent results
+        assertEquals((f == null), (s == null), "Should both or neither throw 
Exceptions");
+        assertEquals(dsdf, dfdp, "Parsed dates should be equal");
     }
 
+    /**
+     * Test case for {@link FastDateParser#FastDateParser(String, TimeZone, 
Locale)}.
+     * @throws ParseException so we don't have to catch it
+     */
     @Test
-    public void testLang1121() throws ParseException {
-        final TimeZone kst = TimeZone.getTimeZone("KST");
-        final DateParser fdp = getInstance("yyyyMMdd", kst, Locale.KOREA);
-
-        assertThrows(ParseException.class, () -> fdp.parse("2015"));
-
-        // Wed Apr 29 00:00:00 KST 2015
-        Date actual = fdp.parse("20150429");
-        final Calendar cal = Calendar.getInstance(kst, Locale.KOREA);
+    public void testShortDateStyleWithLocales() throws ParseException {
+        DateParser fdf = getDateInstance(FastDateFormat.SHORT, Locale.US);
+        final Calendar cal = Calendar.getInstance();
         cal.clear();
-        cal.set(2015, 3, 29);
-        Date expected = cal.getTime();
-        assertEquals(expected, actual);
 
-        final SimpleDateFormat df = new SimpleDateFormat("yyyyMMdd", 
Locale.KOREA);
-        df.setTimeZone(kst);
-        expected = df.parse("20150429113100");
+        cal.set(2004, Calendar.FEBRUARY, 3);
+        assertEquals(cal.getTime(), fdf.parse("2/3/04"));
 
-        // Thu Mar 16 00:00:00 KST 81724
-        actual = fdp.parse("20150429113100");
-        assertEquals(expected, actual);
+        fdf = getDateInstance(FastDateFormat.SHORT, SWEDEN);
+        assertEquals(cal.getTime(), fdf.parse("2004-02-03"));
     }
 
-    @Test
-    public void testParseOffset() {
-        final DateParser parser = getInstance(YMD_SLASH);
-        final Date date = parser.parse("Today is 2015/07/04", new 
ParsePosition(9));
-
-        final Calendar cal = Calendar.getInstance();
+    private void testSingleLocale(final Locale locale) throws ParseException {
+        final Calendar cal = Calendar.getInstance(GMT);
         cal.clear();
-        cal.set(2015, Calendar.JULY, 4);
-        assertEquals(cal.getTime(), date);
+        cal.set(2003, Calendar.FEBRUARY, 10);
+        final SimpleDateFormat sdf = new SimpleDateFormat(LONG_FORMAT, locale);
+        final String formattedDate = sdf.format(cal.getTime());
+        sdf.parse(formattedDate);
+        sdf.parse(formattedDate.toUpperCase(locale));
+        sdf.parse(formattedDate.toLowerCase(locale));
     }
 
     @Test
-    public void testDayNumberOfWeek() throws ParseException {
-        final DateParser parser = getInstance("u");
-        final Calendar calendar = Calendar.getInstance();
-
-        calendar.setTime(parser.parse("1"));
-        assertEquals(Calendar.MONDAY, calendar.get(Calendar.DAY_OF_WEEK));
-
-        calendar.setTime(parser.parse("6"));
-        assertEquals(Calendar.SATURDAY, calendar.get(Calendar.DAY_OF_WEEK));
+    public void testSpecialCharacters() throws Exception {
+        testSdfAndFdp("q", "", true); // bad pattern character (at present)
+        testSdfAndFdp("Q", "", true); // bad pattern character
+        testSdfAndFdp("$", "$", false); // OK
+        testSdfAndFdp("?.d", "?.12", false); // OK
+        testSdfAndFdp("''yyyyMMdd'A''B'HHmmssSSS''", "'20030210A'B153320989'", 
false); // OK
+        testSdfAndFdp("''''yyyyMMdd'A''B'HHmmssSSS''", 
"''20030210A'B153320989'", false); // OK
+        testSdfAndFdp("'$\\Ed'", "$\\Ed", false); // OK
 
-        calendar.setTime(parser.parse("7"));
-        assertEquals(Calendar.SUNDAY, calendar.get(Calendar.DAY_OF_WEEK));
+        // quoted charaters are case sensitive
+        testSdfAndFdp("'QED'", "QED", false);
+        testSdfAndFdp("'QED'", "qed", true);
+        // case sensitive after insensitive Month field
+        testSdfAndFdp("yyyy-MM-dd 'QED'", "2003-02-10 QED", false);
+        testSdfAndFdp("yyyy-MM-dd 'QED'", "2003-02-10 qed", true);
     }
 
     @Test
-    public void testLang1380() throws ParseException {
-        final Calendar expected = Calendar.getInstance(GMT, Locale.FRANCE);
-        expected.clear();
-        expected.set(2014, Calendar.APRIL, 14);
-
-        final DateParser fdp = getInstance("dd MMM yyyy", GMT, Locale.FRANCE);
-        assertEquals(expected.getTime(), fdp.parse("14 avril 2014"));
-        assertEquals(expected.getTime(), fdp.parse("14 avr. 2014"));
-        assertEquals(expected.getTime(), fdp.parse("14 avr 2014"));
+    public void testTimeZoneMatches() {
+        final DateParser parser= getInstance(yMdHmsSZ, REYKJAVIK);
+        assertEquals(REYKJAVIK, parser.getTimeZone());
     }
 
     @Test
-    public void java15BuggyLocaleTestAll() throws ParseException {
-        for (final Locale locale : Locale.getAvailableLocales()) {
-            testSingleLocale(locale);
-        }
+    public void testToStringContainsName() {
+        final DateParser parser= getInstance(YMD_SLASH);
+        assertTrue(parser.toString().startsWith("FastDate"));
     }
 
+    // we cannot use historic dates to test timezone parsing, some timezones 
have second offsets
+    // as well as hours and minutes which makes the z formats a low fidelity 
round trip
     @Test
-    public void java15BuggyLocaleTest() throws ParseException {
-        final String buggyLocaleName = "ff_LR_#Adlm";
-        Locale buggyLocale = null;
+    public void testTzParses() throws Exception {
+        // Check that all Locales can parse the time formats we use
         for (final Locale locale : Locale.getAvailableLocales()) {
-            if (buggyLocaleName.equals(locale.toString())) {
-                buggyLocale = locale;
-                break;
+            final FastDateParser fdp= new FastDateParser("yyyy/MM/dd z", 
TimeZone.getDefault(), locale);
+
+            for (final TimeZone tz :  new TimeZone[]{NEW_YORK, REYKJAVIK, 
GMT}) {
+                final Calendar cal= Calendar.getInstance(tz, locale);
+                cal.clear();
+                cal.set(Calendar.YEAR, 2000);
+                cal.set(Calendar.MONTH, 1);
+                cal.set(Calendar.DAY_OF_MONTH, 10);
+                final Date expected= cal.getTime();
+
+                final Date actual = fdp.parse("2000/02/10 
"+tz.getDisplayName(locale));
+                assertEquals(expected, actual, "tz:"+tz.getID()+" 
locale:"+locale.getDisplayName());
             }
         }
-        if (buggyLocale == null) {
-            return;
-        }
-        testSingleLocale(buggyLocale);
     }
 
-    private void testSingleLocale(final Locale locale) throws ParseException {
-        final Calendar cal = Calendar.getInstance(GMT);
-        cal.clear();
-        cal.set(2003, Calendar.FEBRUARY, 10);
-        final SimpleDateFormat sdf = new SimpleDateFormat(LONG_FORMAT, locale);
-        final String formattedDate = sdf.format(cal.getTime());
-        sdf.parse(formattedDate);
-        sdf.parse(formattedDate.toUpperCase(locale));
-        sdf.parse(formattedDate.toLowerCase(locale));
+    private void validateSdfFormatFdpParseEquality(final String format, final 
Locale locale, final TimeZone tz, final DateParser fdp, final Date in, final 
int year, final Date cs) throws ParseException {
+        final SimpleDateFormat sdf = new SimpleDateFormat(format, locale);
+        sdf.setTimeZone(tz);
+        if (format.equals(SHORT_FORMAT)) {
+            sdf.set2DigitYearStart( cs );
+        }
+        final String fmt = sdf.format(in);
+        try {
+            final Date out = fdp.parse(fmt);
+            assertEquals(in, out, locale.toString()+" "+in+" "+ format+ " 
"+tz.getID());
+        } catch (final ParseException pe) {
+            if (year >= 1868 || !locale.getCountry().equals("JP")) {// LANG-978
+                throw pe;
+            }
+        }
     }
 }

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