Abstract validatable types (#16)

* Handle including `AVD::Validatable` into abstract parent types
* Bump versions

shard.yml

@@ -1,6 +1,6 @@
 name: athena-validator
 
-version: 0.1.5
+version: 0.1.6
 
 crystal: '>= 0.35.0'
 

spec/validatable_spec.cr

@@ -10,10 +10,40 @@ private class ManualConstraints
   def initialize(@name : String); end
 end
 
+private abstract class Parent
+  include AVD::Validatable
+end
+
+private class Child < Parent
+  @[Assert::NotBlank]
+  property name : String = ""
+end
+
+private class Obj
+  include AVD::Validatable
+
+  @[Assert::NotBlank]
+  property name : String = ""
+end
+
 describe AVD::Validatable do
   describe ".load_metadata" do
     it "should manually add constraints to the metadata object" do
       ManualConstraints.validation_class_metadata.constrained_properties.should eq ["name"]
     end
   end
+
+  describe ".validation_class_metadata" do
+    it "is inheritted when included in parent type" do
+      Child.validation_class_metadata.constrained_properties.should eq ["name"]
+    end
+
+    it "is not defined for abstract types" do
+      Parent.responds_to?(:validation_class_metadata).should be_false
+    end
+
+    it "is defined when included directly into non-abstract types" do
+      Obj.validation_class_metadata.constrained_properties.should eq ["name"]
+    end
+  end
 end

src/athena-validator.cr

@@ -383,7 +383,7 @@ alias Assert = AVD::Annotations
 #
 # NOTE: See the related types for more detailed information.
 module Athena::Validator
-  VERSION = "0.1.5"
+  VERSION = "0.1.6"
 
   # :nodoc:
   #

src/validatable.cr

@@ -21,6 +21,12 @@ module Athena::Validator::Validatable
   macro included
     extend AVD::Validatable::Class
 
-    class_getter validation_class_metadata : AVD::Metadata::ClassMetadata(self) { AVD::Metadata::ClassMetadata(self).build }
+    macro inherited
+      include AVD::Validatable
+    end
+
+    {% unless @type.abstract? %}
+      class_getter validation_class_metadata : AVD::Metadata::ClassMetadata(self) { AVD::Metadata::ClassMetadata(self).build }
+    {% end %}
   end
 end