Initial work on values DSL

src/spectator/dsl.cr

@@ -4,6 +4,7 @@ require "./dsl/examples"
 require "./dsl/groups"
 require "./dsl/hooks"
 require "./dsl/top"
+require "./dsl/values"
 
 module Spectator
   # Namespace containing methods representing the spec domain specific language.

src/spectator/dsl/values.cr

@@ -1,21 +1,15 @@
+require "../lazy_wrapper"
+
 module Spectator::DSL
+  # DSL methods for defining test values (subjects).
   module Values
-  end
-
     macro let(name, &block)
-      @%wrapper : ::Spectator::ValueWrapper?
+      {% raise "Block required for 'let'" unless block %}
+
+      @%value = ::Spectator::LazyWrapper.new
 
       def {{name.id}}
-        {{block.body}}
-      end
-
-      def {{name.id}}
-        if (wrapper = @%wrapper)
-          wrapper.as(::Spectator::TypedValueWrapper(typeof(previous_def))).value
-        else
-          previous_def.tap do |value|
-            @%wrapper = ::Spectator::TypedValueWrapper.new(value)
-          end
+        @%value.get {{block}}
       end
     end
   end

src/spectator/test_context.cr

@@ -9,6 +9,7 @@ class SpectatorTestContext < SpectatorContext
   include ::Spectator::DSL::Examples
   include ::Spectator::DSL::Groups
   include ::Spectator::DSL::Hooks
+  include ::Spectator::DSL::Values
 
   # Initial implicit subject for tests.
   # This method should be overridden by example groups when an object is described.