Ignore zero variadic macro warning

Ignore gnu-zero-variadic-macro-arguments for clang because
"__VA_ARGS__" is a GNU extension, not part of the standard
C language.

Replace TYPED_TEST_CASE with TYPED_TEST_SUITE because
TYPED_TEST_CASE has been deprecated.

Change-Id: Id153a24bf4ac2de5623e85c11ac4ca24b6224fd0

test/unittest/documenttest.cpp

@@ -461,15 +461,7 @@ struct DocumentMove: public ::testing::Test {
 };
 
 typedef ::testing::Types< CrtAllocator, MemoryPoolAllocator<> > MoveAllocatorTypes;
-class TypeTestNames {
-public:
-    template <typename T>
-    static std::string GetName(int) {
-        if (std::is_same<T, CrtAllocator>()) return "CrtAllocator";
-        if (std::is_same<T, MemoryPoolAllocator<>>()) return "MemoryPoolAllocator<>";
-    }
-};
-TYPED_TEST_CASE(DocumentMove, MoveAllocatorTypes, TypeTestNames);
+TYPED_TEST_SUITE(DocumentMove, MoveAllocatorTypes);
 
 TYPED_TEST(DocumentMove, MoveConstructor) {
     typedef TypeParam Allocator;

test/unittest/unittest.h

@@ -54,6 +54,7 @@
 #ifdef __clang__
 // All TEST() macro generated this warning, disable globally
 #pragma GCC diagnostic ignored "-Wglobal-constructors"
+#pragma clang diagnostic ignored "-Wgnu-zero-variadic-macro-arguments"
 #endif
 
 template <typename Ch>