在测试许多状态时干掉上下文和主题重复

Question

我终于冒险尝试了，经过多年的自动化测试，我学习了RSpec。

我正在测试具有18种可能状态组合的模型。目前，我的规范看起来像这个简化示例（请注意create来自factory_girl）：

describe MyModel do
  context 'in unapproved state' do
    context 'with guest account' do
      subject { build_stubbed(:my_model, :unapproved, :guest) }

      describe '#method_a' do
        it { ... }
      end

      describe '#method_b' do
        it { ... }
      end
    end

    context 'with full account' do
      subject { build_stubbed(:my_model, :unapproved, :full) }

      describe '#method_a' do
        it { ... }
      end

      describe '#method_b' do
        it { ... }
      end
    end
  end

  context 'in approved state' do
    context 'with guest account' do
      subject { build_stubbed(:my_model, :approved, :guest) }

      describe '#method_a' do
        it { ... }
      end

      describe '#method_b' do
        it { ... }
      end
    end

    context 'with full account' do
      subject { build_stubbed(:my_model, :approved, :full) }

      describe '#method_a' do
        it { ... }
      end

      describe '#method_b' do
        it { ... }
      end
    end
  end
end

这很有效，我（大多数时候）对它很满意。但是，我已经对RSpec最佳实践进行了大量阅读，并且我应该将所有describe放在最外层并将context嵌入其中（与之相反）我上面有。）

将describe置于最外层对我来说非常有意义，因为它将您班级的组成部分（您实际测试的内容）组合在一起。我上面的例子将成为：

describe MyModel do
  describe '#method_a' do
    context 'in unapproved state' do
      context 'with guest account' do
        subject { build_stubbed(:my_model, :unapproved, :guest) }
        it { ... }
      end

      context 'with full account' do
        subject { build_stubbed(:my_model, :unapproved, :full) }
        it { ... }
      end
    end

    context 'in approved state' do
      context 'with guest account' do
        subject { build_stubbed(:my_model, :approved, :guest) }
        it { ... }
      end

      context 'with full account' do
        subject { build_stubbed(:my_model, :approved, :full) }
        it { ... }
      end
    end
  end

  describe '#method_a' do
    context 'in unapproved state' do
      context 'with guest account' do
        subject { build_stubbed(:my_model, :unapproved, :guest) }
        it { ... }
      end

      context 'with full account' do
        subject { build_stubbed(:my_model, :unapproved, :full) }
        it { ... }
      end
    end

    context 'in approved state' do
      context 'with guest account' do
        subject { build_stubbed(:my_model, :approved, :guest) }
        it { ... }
      end

      context 'with full account' do
        subject { build_stubbed(:my_model, :approved, :full) }
        it { ... }
      end
    end
  end
end

这很酷，我认为它使我的规范更容易阅读和导航。然而，现在有很多重复与上下文和主题。

在这种情况下减少重复的好方法是什么？