Initial work on hooks rework

src/spectator/dsl/hooks.cr

@@ -1,5 +1,39 @@
-module Spectator
-  module DSL
+module Spectator::DSL
+  # DSL methods for adding custom logic to key times of the spec execution.
+  module Hooks
+    # Defines code to run before any and all examples in an example group.
+    macro before_all(&block)
+      {% raise "Cannot use 'before_all' inside of a test block" if @def %}
+
+      def self.%hook : Nil
+        {{block.body}}
+      end
+
+      ::Spectator::DSL::Builder.add_hook(
+        :before
+      ) { {{@type.name}.%hook }
+    end
+
+    macro before_each(&block)
+      {% raise "Cannot use 'before_each' inside of a test block" if @def %}
+
+      def %hook : Nil
+        {{block.body}}
+      end
+
+      ::Spectator::DSL::Builder.add_context_hook(
+        :before,
+        {{@type.name}}
+      ) { |context| context.as({{@type.name}).%hook }
+    end
+
+    macro after_all(&block)
+    end
+
+    macro after_each(&block)
+    end
+  end
+
     macro before_each(&block)
       def %hook({{block.args.splat}}) : Nil
         {{block.body}}