Working example creation from DSL

src/spectator/dsl.cr

@@ -1,5 +1,6 @@
 # require "./dsl/*"
 require "./dsl/builder"
+require "./dsl/examples"
 require "./dsl/groups"
 
 module Spectator

src/spectator/dsl/builder.cr

@@ -13,5 +13,9 @@ module Spectator::DSL
     def end_group(*args)
       @@builder.end_group(*args)
     end
+
+    def add_example(*args, &block : Example, Context ->)
+      @@builder.add_example(*args, &block)
+    end
   end
 end

src/spectator/dsl/examples.cr

@@ -1,8 +1,29 @@
 require "../source"
-require "../spec_builder"
+require "./builder"
 
-module Spectator
-  module DSL
+module Spectator::DSL
+  module Examples
+    macro example(what = nil, *, _source_file = __FILE__, _source_line = __LINE__, &block)
+      def %test
+        {{block.body}}
+      end
+
+      %source = ::Spectator::Source.new({{_source_file}}, {{_source_line}})
+      ::Spectator::DSL::Builder.add_example(
+        {{what.is_a?(StringLiteral | NilLiteral) ? what : what.stringify}},
+        %source,
+        {{@type.name}}.new
+      ) { |example, context| context.as({{@type.name}}).%test }
+    end
+
+    macro it(what = nil, *, _source_file = __FILE__, _source_line = __LINE__, &block)
+      example({{what}}, _source_file: {{_source_file}}, _source_line: {{_source_line}}) {{block}}
+    end
+
+    macro specify(what = nil, *, _source_file = __FILE__, _source_line = __LINE__, &block)
+      example({{what}}, _source_file: {{_source_file}}, _source_line: {{_source_line}}) {{block}}
+    end
+  end
     macro it(description = nil, _source_file = __FILE__, _source_line = __LINE__, &block)
       {% if block.is_a?(Nop) %}
         {% if description.is_a?(Call) %}
@@ -60,5 +81,4 @@ module Spectator
     macro xit(description = nil, &block)
       pending({{description}}) {{block}}
     end
-  end
 end

src/spectator/spec/builder.cr

@@ -1,4 +1,5 @@
 require "../example"
+require "../example_context_method"
 require "../example_group"
 
 module Spectator
@@ -38,6 +39,16 @@ module Spectator
       @group_stack.pop
     end
 
+    def add_example(name, source, context, &block : Example, Context ->)
+      {% if flag?(:spectator_debug) %}
+        puts "Add example: #{name} @ #{source}"
+        puts "Context: #{context}"
+      {% end %}
+      delegate = ExampleContextDelegate.new(context, block)
+      Example.new(delegate, name, source, current_group)
+      # The example is added to the current group by `Example` initializer.
+    end
+
     def build
       raise NotImplementedError.new("#build")
     end

src/spectator_test_context.cr

@@ -2,6 +2,7 @@ require "./spectator_context"
 require "./spectator/dsl"
 
 class SpectatorTestContext < SpectatorContext
+  include ::Spectator::DSL::Examples
   include ::Spectator::DSL::Groups
 
   # Initial implicit subject for tests.