spec_file.rb

RSpec.describe Foo::Bar do
  let(:obj) { OpenStruct.new(name: 'dummy', ops: '-l -a', post_cmd: true) }

  it 'should run test 1' do
    # test
    # will fail if post_cmd is false
  end

  it 'should run test 2' do
    # test
  end

  context 'obj with post_cmd attribute as false' do
    before { obj.post_cmd = 'false' }

    it 'should run test 3' do
      # test
    end

    it 'should run test 4' do
      # test
    end
  end
end