Implement described_by for RSpec

Author: joeldrapper

lib/quickdraw/rspec.rb

@@ -11,17 +11,7 @@ module Quickdraw::RSpec
 	autoload :Expectation, "quickdraw/rspec/expectation"
 	autoload :Spec, "quickdraw/rspec/spec"
 
-	def self.describe(description = nil, &block)
-		Class.new(Spec) do
-			if respond_to?(:set_temporary_name)
-				case description
-				when Class
-					set_temporary_name "(#{description.name})"
-				else
-					set_temporary_name "(#{description})"
-				end
-			end
-			class_exec(&block)
-		end
+	def self.describe(description = nil, &)
+		Spec.describe(description, &)
 	end
 end

lib/quickdraw/rspec/spec.rb

@@ -4,8 +4,17 @@ class Quickdraw::RSpec::Spec < Quickdraw::BasicTest
 	include Quickdraw::RSpec::Matchers
 
 	class << self
+		def described_class
+			@described_class || (superclass.described_class if superclass.respond_to?(:described_class))
+		end
+
 		def describe(description, &block)
 			Class.new(self) do
+				case description
+				when Class, Module
+					@described_class = description
+				end
+
 				if respond_to?(:set_temporary_name)
 					case description
 					when Class
@@ -40,6 +49,10 @@ def let(name, &block)
 		end
 	end
 
+	def described_class
+		self.class.described_class
+	end
+
 	def expect(subject)
 		Quickdraw::RSpec::Expectation.new(subject, context: self)
 	end

test/rspec/described_class.test.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require "quickdraw/rspec"
+
+Quickdraw::RSpec.describe String do
+	it "provides described_class" do
+		expect(described_class).to eq(String)
+	end
+
+	describe "nested" do
+		it "inherits described_class" do
+			expect(described_class).to eq(String)
+		end
+	end
+
+	describe Array do
+		it "overrides described_class" do
+			expect(described_class).to eq(Array)
+		end
+	end
+end