Better rspec structure with subject & let blocks

subject_in_each_context_spec.rb

describe Card do
  describe "#value" do  
    context "Two of Hearts" do
      subject { Card.new("2H") }
      its(:value) { should == 2 }
    end
  
    describe "Face Cards" do  
    
      context "King of Clubs" do
        subject { Card.new("KC") }
        its(:value) { should == 13 }
      end
  
      context "Queen of Clubs" do
        subject{ Card.new("QC") }
        its(:value) { should == 12 }
      end

      context "Jack of Hearts" do
        subject{ Card.new("JH") }
        its(:value) { should == 11 }
      end
    end
    
    context "Bad Value" do
      it "should raise StandardError" do
        expect { Card.new("ZZ") }.to raise_error(StandardError)
      end
    end
  end
end

using_wrong_spec.out

Card
  ::new
    given a bad value
      raises
  #value
    is the same as the number
    is 1 for an Ace
    is 11 for a Jack
    is 12 for a Queen
    is 13 for a King

using_wrong_spec.rb

require "rspec/expectations"
require "wrong/adapters/rspec"

RSpec.configuration.expect_with :stdlib
Wrong.config.alias_assert :expect

describe Card do
  describe "::new" do
    context "given a bad value" do
      it "raises" do
        assert { rescuing { Card.new("ZZ") } }
      end
    end
  end

  describe "#value" do  
    it "is the same as the number" do
      (2..10).to_a.each do |n|
        assert { Card.new("#{n}H").value == n }
      end
    end

    it "is 1 for an Ace" do
      assert { Card.new("AH").value == 1 }
    end

    it "is 11 for a Jack" do
      assert { Card.new("JH").value == 11 }
    end

    it "is 12 for a Queen" do
      assert { Card.new("QH").value == 12 }
    end

    it "is 13 for a King" do
      assert { Card.new("KH").value == 13 }
    end
  end
end