tests: add tests for internal utilities

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

tests/cpu/arm/exec.cc

@@ -32,7 +32,7 @@ class CpuFixture {
     };
 };
 
-#define TAG "arm execution"
+static constexpr auto TAG = "[arm][execution]";
 
 using namespace arm;
 
@@ -1051,5 +1051,3 @@ TEST_CASE_METHOD(CpuFixture, "Data Processing", TAG) {
         CHECK(cpu.spsr.raw() == cpu.cpsr.raw());
     }
 }
-
-#undef TAG

tests/cpu/arm/instruction.cc

@@ -1,7 +1,7 @@
 #include "cpu/arm/instruction.hh"
 #include <catch2/catch_test_macros.hpp>
 
-#define TAG "disassembler"
+static constexpr auto TAG = "[arm][disassembly]";
 
 using namespace matar;
 using namespace arm;
@@ -467,5 +467,3 @@ TEST_CASE("Software Interrupt", TAG) {
     CHECK(instruction.condition == Condition::EQ);
     CHECK(instruction.disassemble() == "SWIEQ");
 }
-
-#undef TAG