[general] moving ios and android project under ./platform folder

test/util/text_conversions.test.cpp

@@ -0,0 +1,42 @@
+#include <iostream>
+#include <mbgl/test/util.hpp>
+
+#include <mbgl/util/utf.hpp>
+#include <mbgl/util/platform.hpp>
+
+using namespace mbgl;
+
+TEST(TextConversions, to_upper) {
+    EXPECT_EQ(std::string("STREET"), platform::uppercase("strEEt"));  // EN
+    EXPECT_EQ(std::string("ROAD"), platform::uppercase("rOAd"));      // EN
+
+    EXPECT_EQ(std::string("STRASSE"), platform::uppercase("straße")); // DE
+    EXPECT_EQ(std::string("MASSE"), platform::uppercase("maße"));     // DE
+    EXPECT_EQ(std::string("WEISSKOPFSEEADLER"), platform::uppercase("weißkopfseeadler")); // DE
+
+    EXPECT_EQ(std::string("BÊNÇÃO"), platform::uppercase("bênção")); // PT
+    EXPECT_EQ(std::string("AZƏRBAYCAN"), platform::uppercase("Azərbaycan")); // AZ
+    EXPECT_EQ(std::string("ὈΔΥΣΣΕΎΣ"), platform::uppercase("Ὀδυσσεύς")); // GR
+}
+
+
+TEST(TextConversions, to_lower) {
+    EXPECT_EQ(std::string("street"), platform::lowercase("strEEt"));  // EN
+    EXPECT_EQ(std::string("road"), platform::lowercase("rOAd"));      // EN
+
+    EXPECT_EQ(std::string("straße"), platform::lowercase("Straße"));   // DE
+    EXPECT_EQ(std::string("strasse"), platform::lowercase("STRASSE")); // DE
+    EXPECT_EQ(std::string("masse"), platform::lowercase("MASSE"));     // DE
+    EXPECT_EQ(std::string("weisskopfseeadler"), platform::lowercase("weiSSkopfseeadler")); // DE
+
+    EXPECT_EQ(std::string("bênção"), platform::lowercase("BÊNÇÃO")); // PT
+    EXPECT_EQ(std::string("azərbaycan"), platform::lowercase("AZƏRBAYCAN")); // AZ
+
+#if defined(__QT__)
+    // https://bugreports.qt.io/browse/QTBUG-17337
+    EXPECT_NE(std::string("ὀδυσσεύς"), platform::lowercase("ὈΔΥΣΣΕΎΣ")); // GR
+#else
+    EXPECT_EQ(std::string("ὀδυσσεύς"), platform::lowercase("ὈΔΥΣΣΕΎΣ")); // GR
+#endif
+
+}