Added i18n unit test

test/i18n.cpp

@@ -0,0 +1,50 @@
+#include "../src/server/i18n.h"
+#include "gtest/gtest.h"
+
+using namespace kiwix;
+
+TEST(ParameterizedMessage, parameterlessMessages)
+{
+  {
+    const ParameterizedMessage msg("404-page-title", {});
+
+    EXPECT_EQ(msg.getText("en"),   "Content not found");
+    EXPECT_EQ(msg.getText("test"), "[I18N TESTING] Not Found - Try Again");
+  }
+
+  {
+    // Make sure that msgId influences the result of getText()
+    const ParameterizedMessage msg("random-page-button-text", {});
+
+    EXPECT_EQ(msg.getText("en"),   "Go to a randomly selected page");
+    EXPECT_EQ(msg.getText("test"), "[I18N TESTING] I am tired of determinism");
+  }
+
+  {
+    // Demonstrate that unwanted parameters are silently ignored
+    const ParameterizedMessage msg("404-page-title", {{"abc", "xyz"}});
+
+    EXPECT_EQ(msg.getText("en"),   "Content not found");
+    EXPECT_EQ(msg.getText("test"), "[I18N TESTING] Not Found - Try Again");
+  }
+}
+
+TEST(ParameterizedMessage, messagesWithParameters)
+{
+  {
+    const ParameterizedMessage msg("filter-by-tag",
+                                   {{"TAG", "scifi"}}
+    );
+
+    EXPECT_EQ(msg.getText("en"),   "Filter by tag \"scifi\"");
+    EXPECT_EQ(msg.getText("test"), "Filter [I18N] by [TESTING] tag \"scifi\"");
+  }
+
+  {
+    // Omitting expected parameters amounts to using empty values for them
+    const ParameterizedMessage msg("filter-by-tag", {});
+
+    EXPECT_EQ(msg.getText("en"),   "Filter by tag \"\"");
+    EXPECT_EQ(msg.getText("test"), "Filter [I18N] by [TESTING] tag \"\"");
+  }
+}

test/meson.build

@@ -13,7 +13,8 @@ tests = [
     'name_mapper',
     'opds_catalog',
     'server_helper',
-    'lrucache'
+    'lrucache',
+    'i18n'
 ]
 
 if build_machine.system() != 'windows'