shared_examples 'helm commands' do describe '#generate_script' do let(:helm_setup) do <<~EOS set -eo pipefail ALPINE_VERSION=$(cat /etc/alpine-release | cut -d '.' -f 1,2) echo http://mirror.clarkson.edu/alpine/v$ALPINE_VERSION/main >> /etc/apk/repositories echo http://mirror1.hs-esslingen.de/pub/Mirrors/alpine/v$ALPINE_VERSION/main >> /etc/apk/repositories apk add -U ca-certificates openssl >/dev/null wget -q -O - https://kubernetes-helm.storage.googleapis.com/helm-v2.7.0-linux-amd64.tar.gz | tar zxC /tmp >/dev/null mv /tmp/linux-amd64/helm /usr/bin/ EOS end it 'should return appropriate command' do expect(subject.generate_script).to eq(helm_setup + commands) end end end