RSpec.shared_examples 'stack template' do
  validated_model_name = described_class.name.demodulize.underscore

  it 'is valid with factory attrs' do
    expect(build(validated_model_name)).to be_valid
  end

  describe 'validation rules' do
    include_examples 'field type validation', :id, :not_nil, :non_empty_string, :only_word_symbols, :field_validator
    include_examples 'field type validation', :provider, :not_nil, :non_empty_string, :field_validator
    include_examples 'field type validation', :template_body, :not_nil, :non_empty_string, :field_validator
    include_examples 'field type validation', :owner, :not_nil, :non_empty_string, :field_validator
  end

  describe '#to_hash_without_id' do
    it 'returns hash with provider, template_body and owner' do
      expect(stack_template.to_hash_without_id).to include(:provider, :template_body, :owner)
    end
  end

  describe '.create' do
    it "returns instance of #{described_class.name}" do
      params = {
        'id' => 'foo',
        'template_body' => '{}',
        'owner' => 'root',
        'provider' => 'ec2'
      }
      expect(described_class.create(params)).to be_an_instance_of(described_class)
    end
  end

  describe '#build_from_bson' do
    let(:params) { {
      '_id' => 'foo',
      'template_body' => '{}',
      'owner' => 'root',
      'provider' => 'ec2'
    }}

    subject { described_class.build_from_bson(params) }

    it 'sets id from _id' do
      expect(subject.id).to eq 'foo'
    end

    it 'sets other params from given hash' do
      expect(subject.template_body).to eq '{}'
      expect(subject.owner).to eq 'root'
      expect(subject.provider).to eq 'ec2'
    end
  end
end