svalbard: add holidays

jollyday-core/src/main/java/de/focus_shift/jollyday/core/HolidayCalendar.java

@@ -31,7 +31,7 @@ public enum HolidayCalendar {
   NAMIBIA("NA"), NETHERLANDS("NL"), NEW_ZEALAND("NZ"), NICARAGUA("NI"), NIGER("NE"), NIGERIA("NG"), NORWAY("NO"), NYSE("NYSE"), NYSE_EURONEXT("NYSE_EURONEXT"),
   PANAMA("PA"), PARAGUAY("PY"), PERU("PE"), POLAND("PL"), PORTUGAL("PT"),
   ROMANIA("RO"), RUSSIA("RU"), RWANDA("RW"),
-  SAN_MARINO("SM"), SAUDI_ARABIA("SA"), SERBIA("RS"), SIERRA_LEONE("SL"), SEYCHELLES("SC"), SINGAPORE("SG"), SLOWAKIA("SK"), SLOWENIA("SI"), SOMALIA("SO"), SUDAN("SD"), SOUTH_AFRICA("ZA"), SOUTH_SUDAN("SS"), SPAIN("ES"), SURINAME("SR"), SYRIA("SY"), SWEDEN("SE"), SWITZERLAND("CH"),
+  SAN_MARINO("SM"), SAUDI_ARABIA("SA"), SERBIA("RS"), SIERRA_LEONE("SL"), SEYCHELLES("SC"), SINGAPORE("SG"), SLOWAKIA("SK"), SLOWENIA("SI"), SOMALIA("SO"), SUDAN("SD"), SOUTH_AFRICA("ZA"), SOUTH_SUDAN("SS"), SPAIN("ES"), SVALBARD_AND_JAN_MAYEN("SJ"), SURINAME("SR"), SYRIA("SY"), SWEDEN("SE"), SWITZERLAND("CH"),
   TARGET("TARGET"), TARGET2_SECURITIES("TARGET2_SECURITIES"), TAJIKISTAN("TJ"), TANZANIA("TZ"), TOGO("TG"), TRINIDAD_AND_TOBAGO("TT"), TUNISIA("TN"), TURKMENISTAN("TM"), TURKEY("TR"),
   UGANDA("UG"), UKRAINE("UA"), UNITED_ARAB_EMIRATES("AE"), UNITED_KINGDOM(Locale.UK.getCountry()), UNITED_STATES(Locale.US.getCountry()), URUGUAY("UY"), UZBEKISTAN("UZ"),
   VATICAN_CITY("VA"), VENEZUELA("VE"), VIETNAM("VN"), YEMEN("YE"),

jollyday-core/src/main/resources/holidays/Holidays_sj.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<Configuration hierarchy="sj" description="Svalbard and Jan Mayen"
+               xmlns="https://focus_shift.de/jollyday/schema/holiday"
+               xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+               xsi:schemaLocation="https://focus_shift.de/jollyday/schema/holiday https://focus_shift.de/jollyday/schema/holiday/holiday.xsd">
+  <Holidays>
+    <Fixed month="JANUARY" day="1" descriptionPropertiesKey="NEW_YEAR"/>
+    <Fixed month="MAY" day="1" descriptionPropertiesKey="LABOUR_DAY"/>
+    <Fixed month="MAY" day="17" descriptionPropertiesKey="CONSTITUTION_DAY"/>
+    <Fixed month="DECEMBER" day="25" descriptionPropertiesKey="CHRISTMAS"/>
+    <Fixed month="DECEMBER" day="26" descriptionPropertiesKey="STEPHENS"/>
+    <ChristianHoliday type="MAUNDY_THURSDAY"/>
+    <ChristianHoliday type="GOOD_FRIDAY"/>
+    <ChristianHoliday type="EASTER"/>
+    <ChristianHoliday type="EASTER_MONDAY"/>
+    <ChristianHoliday type="ASCENSION_DAY"/>
+    <ChristianHoliday type="PENTECOST"/>
+    <ChristianHoliday type="WHIT_MONDAY"/>
+  </Holidays>
+
+  <Sources>
+    <Source>https://en.wikipedia.org/wiki/Public_holidays_in_Svalbard</Source>
+    <Source of="ISO 3166">https://www.iso.org/obp/ui/#iso:code:3166:SJ</Source>
+  </Sources>
+</Configuration>

jollyday-tests/src/test/java/de/focus_shift/jollyday/tests/country/HolidaySJTest.java

@@ -0,0 +1,30 @@
+package de.focus_shift.jollyday.tests.country;
+
+import org.junit.jupiter.api.Test;
+
+import static de.focus_shift.jollyday.core.HolidayCalendar.SVALBARD_AND_JAN_MAYEN;
+import static de.focus_shift.jollyday.tests.CalendarCheckerApi.assertFor;
+import static java.time.Month.JANUARY;
+import static java.time.Month.MAY;
+import static java.time.Month.DECEMBER;
+
+class HolidaySJTest {
+
+  @Test
+  void ensuresHolidays() {
+    assertFor(SVALBARD_AND_JAN_MAYEN)
+      .hasFixedHoliday("NEW_YEAR", JANUARY, 1).and()
+      .hasFixedHoliday("LABOUR_DAY", MAY, 1).and()
+      .hasFixedHoliday("CONSTITUTION_DAY", MAY, 17).and()
+      .hasFixedHoliday("CHRISTMAS", DECEMBER, 25).and()
+      .hasFixedHoliday("STEPHENS", DECEMBER, 26).and()
+      .hasChristianHoliday("MAUNDY_THURSDAY").and()
+      .hasChristianHoliday("GOOD_FRIDAY").and()
+      .hasChristianHoliday("EASTER").and()
+      .hasChristianHoliday("EASTER_MONDAY").and()
+      .hasChristianHoliday("ASCENSION_DAY").and()
+      .hasChristianHoliday("PENTECOST").and()
+      .hasChristianHoliday("WHIT_MONDAY")
+      .check();
+  }
+}