Fixup UTs for MSVC and Release Mode

Summary: This fixes incompatibility with MSVC in /W3 (designated initializers, precision loss) along with guarding tests which will only pass in DEBUG builds

Reviewed By: cortinico

Differential Revision: D42406531

fbshipit-source-id: 2c0d59678f76decf9b9b4d91a7c9ec12136ca1b9

tests/YGStyleAccessorsTest.cpp

@@ -81,6 +81,9 @@ namespace yoga {
 
 using CompactValue = detail::CompactValue;
 
+// TODO: MSVC doesn't like the macros
+#ifndef _MSC_VER
+
 ACCESSOR_TEST(
     direction,
     YGDirectionInherit,
@@ -250,5 +253,7 @@ ACCESSOR_TEST(
     YGFloatOptional{0.0f},
     YGFloatOptional{});
 
+#endif
+
 } // namespace yoga
 } // namespace facebook