Refactor test.cpp (#7487)

* Add timing command to cmakelist

* Start to split test.cpp. Move flexbuffers tests

* Move monster related tests to own file

* Move parser related tests to own file

* Move json related tests to own file

* Move proto related tests to own file

* moved more functions to parser test

* moved more functions to parser test2

* move monster extra tests to monster test

* move evolution tests to own file

* move reflection tests to own file

* move util tests to own file

* rehomed various tests

* move optional scalars test to own file:

* rehome more tests

* move fuzz tests. Got rid of global test_data_path

* fixes for CI failures

* add bazel files

tests/is_quiet_nan.h

@@ -0,0 +1,41 @@
+#ifndef TESTS_IS_QUIET_NAN_H
+#define TESTS_IS_QUIET_NAN_H
+
+namespace flatbuffers {
+namespace tests {
+
+#if defined(FLATBUFFERS_HAS_NEW_STRTOD) && (FLATBUFFERS_HAS_NEW_STRTOD > 0)
+// The IEEE-754 quiet_NaN is not simple binary constant.
+// All binary NaN bit strings have all the bits of the biased exponent field E
+// set to 1. A quiet NaN bit string should be encoded with the first bit d[1]
+// of the trailing significand field T being 1 (d[0] is implicit bit).
+// It is assumed that endianness of floating-point is same as integer.
+template<typename T, typename U, U qnan_base> bool is_quiet_nan_impl(T v) {
+  static_assert(sizeof(T) == sizeof(U), "unexpected");
+  U b = 0;
+  std::memcpy(&b, &v, sizeof(T));
+  return ((b & qnan_base) == qnan_base);
+}
+#  if defined(__mips__) || defined(__hppa__)
+inline bool is_quiet_nan(float v) {
+  return is_quiet_nan_impl<float, uint32_t, 0x7FC00000u>(v) ||
+         is_quiet_nan_impl<float, uint32_t, 0x7FBFFFFFu>(v);
+}
+inline bool is_quiet_nan(double v) {
+  return is_quiet_nan_impl<double, uint64_t, 0x7FF8000000000000ul>(v) ||
+         is_quiet_nan_impl<double, uint64_t, 0x7FF7FFFFFFFFFFFFu>(v);
+}
+#  else
+inline bool is_quiet_nan(float v) {
+  return is_quiet_nan_impl<float, uint32_t, 0x7FC00000u>(v);
+}
+inline bool is_quiet_nan(double v) {
+  return is_quiet_nan_impl<double, uint64_t, 0x7FF8000000000000ul>(v);
+}
+#  endif
+#endif
+
+}  // namespace tests
+}  // namespace flatbuffers
+
+#endif  // TESTS_IS_QUIET_NAN_H