Add support for legacy C test code compilation under Clang in CMake #3

	name: Test Parity Verification

	on:
	push:
	branches: [ main, develop ]
	pull_request:
	branches: [ main, develop ]

	jobs:
	test-parity:
	name: Verify C++ wrapper maintains test parity with original C implementation
	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -y cmake build-essential

	- name: Configure build
	run: \|
	mkdir -p build
	cd build
	cmake -DCMAKE_BUILD_TYPE=Release ..

	- name: Build all components
	run: \|
	cd build
	cmake --build . --parallel --config Release

	- name: Build C tests
	run: \|
	cd build
	cmake --build . --target test_csv --config Release

	- name: Run C tests
	run: \|
	./build/legacy/test_csv > /tmp/c_tests_output.txt 2>&1
	echo "✓ C tests completed"
	cat /tmp/c_tests_output.txt

	- name: Run C++ tests
	run: \|
	./build/tests/test_parity > /tmp/cpp_tests_output.txt 2>&1
	echo "✓ C++ tests completed"
	cat /tmp/cpp_tests_output.txt

	- name: Verify test parity
	run: \|
	echo "Comparing test outputs..."
	if diff /tmp/c_tests_output.txt /tmp/cpp_tests_output.txt; then
	echo "✅ PERFECT PARITY: C and C++ tests produce identical output"
	exit 0
	else
	echo "❌ PARITY MISMATCH: Test outputs differ"
	echo ""
	echo "=== Differences ==="
	diff -u /tmp/c_tests_output.txt /tmp/cpp_tests_output.txt \|\| true
	exit 1
	fi

	- name: Upload test results
	if: always()
	uses: actions/upload-artifact@v4
	with:
	name: test-outputs
	path: \|
	/tmp/c_tests_output.txt
	/tmp/cpp_tests_output.txt

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