Add test

Author: FrankYFTang

inflection/test/src/inflection/message2/MF2FactoryTest.cpp

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2025 Google Inc. All rights reserved.
+ */
+#include "catch2/catch_test_macros.hpp"
+
+#include <inflection/message2/MF2Factory.hpp>
+#include <inflection/util/LocaleUtils.hpp>
+#include <inflection/npc.hpp>
+
+#include "unicode/locid.h"
+#include "unicode/messageformat2.h"
+#include "unicode/messageformat2_function_registry.h"
+
+
+using icu::Locale;
+using icu::message2::data_model::FunctionName;
+using icu::message2::MFFunctionRegistry;
+using icu::message2::MessageFormatter;
+
+
+MFFunctionRegistry SetupCustomBuilder(UErrorCode& errorCode) {
+    auto functionName = FunctionName("inflection");
+    return MFFunctionRegistry::Builder(errorCode)
+        .adoptFormatter(functionName, inflection::message2::createFormatterFactory(), errorCode)
+        .adoptSelector(functionName, inflection::message2::createSelectorFactory(), errorCode)
+        .build();
+}
+
+TEST_CASE("MF2Factory#testBasic")
+{
+    UErrorCode errorCode = U_ZERO_ERROR;
+    auto customRegistry = SetupCustomBuilder(errorCode);
+    REQUIRE(U_SUCCESS(errorCode));
+}
+
+TEST_CASE("MF2Factory#testCreateFormatter")
+{
+    UErrorCode errorCode = U_ZERO_ERROR;
+    UParseError pe;
+    MessageFormatter mf = MessageFormatter::Builder(errorCode)
+                .setFunctionRegistry(SetupCustomBuilder(errorCode))
+                .setLocale(Locale::forLanguageTag("es-MX", errorCode))
+                .setPattern("Foo {$name :inflection hello=world definiteness=definite number=plural gender=feminine} Bar", pe, errorCode)
+                .build(errorCode);
+    REQUIRE(U_SUCCESS(errorCode));
+}