invalid parameter error in rspec-puppet

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Hi,

I want to test all the if conditions of manifests

if $::operatingsystem == 'RedHat' {
  package { 'packagename' :
      ensure  => latest,

    }
}

 if $::operatingsystemmajrelease >= '7' {
      include 'dependent class'
    }

Below is the rspec-puppet for the manifest

let(:facts) {{ :operatingsystem => 'RedHat', :operatingsystemmajrelease => '6'}}

  context 'operatingsystem is Redhat' do
    let(:params) { {:operatingsystemmajrelease => 6} }

    it { should compile.with_all_deps }

    it { should contain_package(packagename).with(
        'ensure'  => 'latest'
    )}

  context 'operatingsystemmajrelease is 7' do
  let(:facts) {{ :operatingsystemmajrelease => '7'}}
   let(:params) { {:operatingsystemmajrelease => 7} }
    it { should contain_class('dependent class') }

I am getting "Invalid parameter operatingsystemmajrelease on Class[class_name] at line 3 on node"

how can I test the "if condition" if the operatingsystemmajrelease is 6 or operatingsystemmajrelease is 7