```ruby
require 'spec_helper'

describe 'nexus3::default' do
  context 'linux' do
    let(:chef_run) do
      ChefSpec::SoloRunner.new(platform: 'centos', version: CENTOS_VERSION, step_into: 'nexus3')
                          .converge(described_recipe)
    end

    it 'converges successfully' do
      expect { :chef_run }.to_not raise_error
    end
  end

  context 'windows' do
    let(:chef_run) do
      ChefSpec::SoloRunner.new(platform: 'windows', version: '2012R2', step_into: 'nexus3') do
        ENV['SYSTEMDRIVE'] = 'C:'
      end.converge(described_recipe)
    end

    it 'converges successfully' do
      expect { :chef_run }.to_not raise_error
    end
  end
end
```

Fix default spec to actually perform a chef run
user
```ruby
require 'spec_helper'

describe 'nexus3::default' do
  context 'linux' do
    let(:chef_run) do
      ChefSpec::SoloRunner.new(platform: 'centos', version: CENTOS_VERSION, step_into: 'nexus3')
                          .converge(described_recipe)
    end

    it 'converges successfully' do
      expect { chef_run }.to_not raise_error
    end
  end

  context 'windows' do
    let(:chef_run) do
      ChefSpec::SoloRunner.new(platform: 'windows', version: '2012R2', step_into: 'nexus3') do
        ENV['SYSTEMDRIVE'] = 'C:'
      end.converge(described_recipe)
    end

    it 'converges successfully' do
      expect { chef_run }.to_not raise_error
    end
  end
end
```
assistant