add tests for b3 multi propagation #140

	name: Geneva Metrics CI

	on:
	push:
	branches: "*"
	paths:
	- "exporters/geneva/**"
	- ".github/workflows/geneva_metrics.yml"
	pull_request:
	branches: [main]
	paths:
	- "exporters/geneva/**"
	- ".github/workflows/geneva_metrics.yml"
	jobs:
	cmake_linux:
	name: CMake on Linux
	runs-on: ubuntu-latest
	steps:
	- name: checkout otel contrib geneva metrics
	uses: actions/checkout@v3
	with:
	path: "otel_cpp_contrib"
	- name: checkout otel cpp
	uses: actions/checkout@v3
	with:
	repository: "open-telemetry/opentelemetry-cpp"
	ref: "v1.15.0"
	path: "otel_cpp"
	submodules: "recursive"
	- name: setup
	run: \|
	sudo apt update -y
	sudo apt install -y --no-install-recommends --no-install-suggests build-essential\
	ca-certificates wget git valgrind lcov
	- name: run tests
	run: \|
	sudo $GITHUB_WORKSPACE/otel_cpp/ci/setup_googletest.sh
	mkdir -p "$GITHUB_WORKSPACE/otel_cpp/build"
	cd "$GITHUB_WORKSPACE/otel_cpp/build"
	cmake .. -DOPENTELEMETRY_INSTALL=ON
	cmake --build . -j$(nproc)
	cmake --install . --prefix "$HOME/prebuilt-otel"
	mkdir -p "$GITHUB_WORKSPACE/otel_cpp_contrib/exporters/geneva/build"
	cd "$GITHUB_WORKSPACE/otel_cpp_contrib/exporters/geneva/build"
	cmake .. "-DCMAKE_PREFIX_PATH=$HOME/prebuilt-otel" \
	-DBUILD_TESTING=ON -DWITH_EXAMPLES=ON
	cmake --build . -j$(nproc)
	ctest

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