1 files changed, 130 insertions, 0 deletions
diff --git a/i18npool/qa/cppunit/test_calendar.cxx b/i18npool/qa/cppunit/test_calendar.cxx
new file mode 100644
index 000000000..a522a4a74
--- /dev/null
+++ b/i18npool/qa/cppunit/test_calendar.cxx
@@ -0,0 +1,130 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+#include <calendar_hijri.hxx>
+#include <unotest/bootstrapfixturebase.hxx>
+
+using namespace com::sun::star;
+
+class TestCalendar : public test::BootstrapFixtureBase
+{
+public:
+    void testHijriGregorian();
+    void testGetGregorianJulianDay();
+
+    CPPUNIT_TEST_SUITE(TestCalendar);
+    CPPUNIT_TEST(testHijriGregorian);
+    CPPUNIT_TEST(testGetGregorianJulianDay);
+    CPPUNIT_TEST_SUITE_END();
+};
+
+void TestCalendar::testHijriGregorian()
+{
+    // 21-7-1443 (Hijri) == 22-2-2022 (Gregorian)
+    sal_Int32 day = 22, month = 2, year = 2022;
+    i18npool::Calendar_hijri::getHijri(&day, &month, &year);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(21), day);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(7), month);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1443), year);
+
+    i18npool::Calendar_hijri::ToGregorian(&day, &month, &year);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(22), day);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(2), month);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(2022), year);
+
+    // 1-1-1 (Hijri) == 15-7-622 (Gregorian)
+    // NOTE: The calculated date is 15-7-622, as it was with the
+    // previous version of i18npool::Calendar_hijri::ToGregorian()
+    // but in some articles, 15-7-622 is considered the equivalent date
+    // https://en.wikipedia.org/wiki/622
+    // This article states that 15-7-622 is correct:
+    // "On the Origins of the Hijrī Calendar: A Multi-Faceted Perspective
+    // Based on the Covenants of the Prophet and Specific Date Verification"
+    // https://www.mdpi.com/2077-1444/12/1/42/htm
+    day = 15;
+    month = 7;
+    year = 622;
+    i18npool::Calendar_hijri::getHijri(&day, &month, &year);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), day);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), month);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), year);
+
+    i18npool::Calendar_hijri::ToGregorian(&day, &month, &year);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(15), day);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(7), month);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(622), year);
+
+    // 1-1-100 (Hijri) == 2-8-718 (Gregorian)
+    // https://habibur.com/hijri/100/
+    day = 2;
+    month = 8;
+    year = 718;
+    i18npool::Calendar_hijri::getHijri(&day, &month, &year);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), day);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), month);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(100), year);
+
+    i18npool::Calendar_hijri::ToGregorian(&day, &month, &year);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(2), day);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(8), month);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(718), year);
+
+    // 1-1-1000 (Hijri) == 19-10-1591 (Gregorian)
+    // NOTE: The calculated date is 18-10-1591, but there is inconsistency
+    // with this website, as it states it should be 19-10-1591
+    // https://habibur.com/hijri/1000/
+    day = 18;
+    month = 10;
+    year = 1591;
+    i18npool::Calendar_hijri::getHijri(&day, &month, &year);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), day);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), month);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1000), year);
+
+    i18npool::Calendar_hijri::ToGregorian(&day, &month, &year);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(18), day);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(10), month);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1591), year);
+
+    // 1-1-2000 (Hijri) == 7-1-2562 (Gregorian)
+    // NOTE: The calculated date is 7-1-2562, but there is inconsistency
+    // with this website, as it states it should be 8-1-2562
+    // https://habibur.com/hijri/2000/
+    day = 7;
+    month = 1;
+    year = 2562;
+    i18npool::Calendar_hijri::getHijri(&day, &month, &year);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), day);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), month);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(2000), year);
+
+    i18npool::Calendar_hijri::ToGregorian(&day, &month, &year);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(7), day);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), month);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(2562), year);
+}
+
+void TestCalendar::testGetGregorianJulianDay()
+{
+    // Julian day for 22-2-2022 (Gregorian) == 2459633
+    // https://core2.gsfc.nasa.gov/time/julian.html
+    sal_Int32 lJulianDay, day = 22, month = 2, year = 2022;
+    lJulianDay = i18npool::Calendar_hijri::getJulianDay(day, month, year);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(2459633), lJulianDay);
+
+    i18npool::Calendar_hijri::getGregorianDay(lJulianDay, &day, &month, &year);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(22), day);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(2), month);
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(2022), year);
+}
+
+CPPUNIT_TEST_SUITE_REGISTRATION(TestCalendar);
+
+CPPUNIT_PLUGIN_IMPLEMENT();
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */