Add a unit test for LocalizeDigitsInString

Change-Id: I51fb04dbc542b4052a31e8c96552406a1d6947e7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/193461
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

vcl/CppunitTest_vcl_localize_digits.mk

@@ -0,0 +1,26 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t; 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/.
+#
+
+$(eval $(call gb_CppunitTest_CppunitTest,vcl_localize_digits))
+
+$(eval $(call gb_CppunitTest_set_include,vcl_localize_digits,\
+    $$(INCLUDE) \
+    -I$(SRCDIR)/vcl/inc \
+))
+
+$(eval $(call gb_CppunitTest_add_exception_objects,vcl_localize_digits, \
+    vcl/qa/cppunit/LocalizeDigits \
+))
+
+$(eval $(call gb_CppunitTest_use_libraries,vcl_localize_digits, \
+    sal \
+    vcl \
+))
+
+# vim: set noet sw=4 ts=4:

vcl/Module_vcl.mk

@@ -254,6 +254,7 @@ $(eval $(call gb_Module_add_check_targets,vcl,\
         CppunitTest_vcl_skia) \
     CppunitTest_vcl_filter_igif \
     CppunitTest_vcl_unit_conversion \
+    CppunitTest_vcl_localize_digits \
 ))
 
 ifeq ($(USING_X11),TRUE)

vcl/qa/cppunit/LocalizeDigits.cxx

@@ -0,0 +1,64 @@
+/* -*- 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 <sal/config.h>
+
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+#include <cppunit/plugin/TestPlugIn.h>
+
+#include <vcl/svapp.hxx>
+
+namespace
+{
+CPPUNIT_TEST_FIXTURE(CppUnit::TestFixture, LocalDigits)
+{
+    // Test the case where there are no digits to convert
+    OUString sNoDigits = "hello";
+    sal_Int32 nLen = sNoDigits.getLength();
+    // It should return the same string
+    CPPUNIT_ASSERT_EQUAL(reinterpret_cast<sal_uIntPtr>(sNoDigits.getStr()),
+                         reinterpret_cast<sal_uIntPtr>(
+                             LocalizeDigitsInString(sNoDigits, LANGUAGE_FARSI, 0, nLen).getStr()));
+    // The length should not change
+    CPPUNIT_ASSERT_EQUAL(sNoDigits.getLength(), nLen);
+
+    // Test the case where there are digits but they are already correct for the locale.
+    OUString sDozen = "There are 12 eggs in a dozen.";
+    nLen = sDozen.getLength();
+    // It should return the same string
+    CPPUNIT_ASSERT_EQUAL(reinterpret_cast<sal_uIntPtr>(sDozen.getStr()),
+                         reinterpret_cast<sal_uIntPtr>(
+                             LocalizeDigitsInString(sDozen, LANGUAGE_SYSTEM, 0, nLen).getStr()));
+    // The length should not change
+    CPPUNIT_ASSERT_EQUAL(sDozen.getLength(), nLen);
+
+    // Test an actual conversion
+    CPPUNIT_ASSERT_EQUAL(u"There are ۱۲ eggs in a dozen."_ustr,
+                         LocalizeDigitsInString(sDozen, LANGUAGE_FARSI, 0, nLen));
+    CPPUNIT_ASSERT_EQUAL(sDozen.getLength(), nLen);
+
+    // Test converting a subrange
+    nLen = 12;
+    CPPUNIT_ASSERT_EQUAL(
+        u"There are ۱۲ eggs in a dozen but 13 in a baker's dozen."_ustr,
+        LocalizeDigitsInString("There are 12 eggs in a dozen but 13 in a baker's dozen.",
+                               LANGUAGE_FARSI, 2, nLen));
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(12), nLen);
+
+    // Test with characters outside of the bmp
+    CPPUNIT_ASSERT_EQUAL(
+        u"𐑞𐑺 𐑸 ۱۲ 𐑧𐑜𐑟 𐑦𐑯 𐑩 𐑚𐑱𐑒𐑼𐑟 𐑛𐑳𐑟𐑩𐑯."_ustr,
+        LocalizeDigitsInString(u"𐑞𐑺 𐑸 12 𐑧𐑜𐑟 𐑦𐑯 𐑩 𐑚𐑱𐑒𐑼𐑟 𐑛𐑳𐑟𐑩𐑯."_ustr, LANGUAGE_FARSI));
+}
+} // namespace
+
+CPPUNIT_PLUGIN_IMPLEMENT();
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */