refactor: rename testbench to test.

- rename testbench to test.
- add benchmark for future development.

test/yycc/macro/compiler_detector.cpp

@@ -0,0 +1,20 @@
+#include <gtest/gtest.h>
+#include <yycc.hpp>
+#include <yycc/macro/compiler_detector.hpp>
+
+#define COMPILER ::yycc::macro::compiler
+
+namespace yycctest::macro::compiler {
+
+    TEST(MacroCompiler, Main) {
+        auto rv = COMPILER::get_compiler();
+#if defined(YYCC_CC_MSVC)
+        EXPECT_EQ(rv, COMPILER::CompilerKind::Msvc);
+#elif defined(YYCC_CC_GCC)
+        EXPECT_EQ(rv, COMPILER::CompilerKind::Gcc);
+#else
+        EXPECT_EQ(rv, COMPILER::CompilerKind::Clang);
+#endif
+    }
+
+} // namespace yycctest::macro::compiler