chore: check exact paths of test executable and provide temp dir

test/Catch2Common/main.cpp

@@ -0,0 +1,48 @@
+#include <catch2/catch_session.hpp>
+#include <filesystem>
+#include <format>
+#include <iostream>
+
+namespace fs = std::filesystem;
+
+int main(const int argc, char* argv[])
+{
+    const fs::path absoluteBinDir(fs::absolute(argv[0]).parent_path());
+
+    const auto expectedLibDir = absoluteBinDir.parent_path().parent_path();
+    const auto expectedBuildDir = expectedLibDir.parent_path();
+    const auto expectedRootDir = expectedBuildDir.parent_path();
+
+    if (absoluteBinDir.filename() != "tests" || expectedLibDir.filename() != "lib" || expectedBuildDir.filename() != "build")
+    {
+        std::cerr << std::format("Expected test binary to be in the folder it was compiled into (build/lib/?/tests) but was {}\n", absoluteBinDir.string());
+        std::cerr << "Please do not move test executable out of compilation folder\n";
+        return 1;
+    }
+
+    const auto expectedSrcDir = expectedRootDir / "src";
+    if (!fs::is_directory(expectedSrcDir))
+    {
+        std::cerr << std::format("Expected source directory to exist in {}, but it did not\n", expectedSrcDir.string());
+        std::cerr << "Please do not move test executable out of compilation folder\n";
+        return 1;
+    }
+
+    const auto expectedTestDir = expectedRootDir / "test";
+    if (!fs::is_directory(expectedTestDir))
+    {
+        std::cerr << std::format("Expected test directory to exist in {}, but it did not\n", expectedTestDir.string());
+        std::cerr << "Please do not move test executable out of compilation folder\n";
+        return 1;
+    }
+
+    fs::current_path(expectedRootDir);
+
+    const auto result = Catch::Session().run(argc, argv);
+
+    const auto tempDir = expectedBuildDir / ".tmp";
+    if (fs::is_directory(tempDir))
+        fs::remove_all(tempDir);
+
+    return result;
+}