Add unit tests to increase coverage #643

	##############################################################################
	# GitHub Actions Workflow for volesti to build examples
	#
	# Copyright (c) 2020-2025 Vissarion Fisikopoulos
	#
	# Licensed under GNU LGPL.3, see LICENCE file
	##############################################################################
	name: cmake-examples

	on: [push, pull_request]

	jobs:
	build:
	name: ${{ matrix.config.os }} - ${{ matrix.config.compiler }}
	strategy:
	fail-fast: false
	matrix:
	config:
	- {os: ubuntu-22.04, compiler_pkg: clang-11, compiler: clang++-11}
	- {os: ubuntu-22.04, compiler_pkg: g++-11, compiler: g++-11}
	runs-on: ${{ matrix.config.os }}
	steps:
	- uses: actions/checkout@v4
	- name: Cache external dependencies (Eigen, Spectra, SuiteSparse)
	uses: actions/cache@v4
	with:
	path: external/_deps
	key: deps-${{ runner.os }}-${{ hashFiles('external/cmake-files/*.cmake') }}
	- run: sudo apt-get update \|\| true;
	sudo apt-get install ${{ matrix.config.compiler_pkg }} lp-solve libopenblas-dev liblapack-dev libomp-dev libarpack2-dev;
	- name: Build examples
	run: \|
	cd examples
	for dir in */; do
	if [ "$dir" != "EnvelopeProblemSOS/" ] && [ "$dir" != "python_utilities/" ]; then
	echo
	echo "Building examples in $dir ....................."
	cd "$dir"
	mkdir build && cd build
	cmake -DCMAKE_CXX_COMPILER=${{ matrix.config.compiler }} -DUSE_MKL=OFF ..
	make -j$(nproc)
	cd ../..
	fi
	done

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