Add generic message validator

.github/workflows/main.yml

@@ -25,6 +25,3 @@ jobs:
           bundler-cache: true
       - name: Run the default task
         run: bundle exec rake
-
-      - name: Run Steep check
-        run: bundle exec steep check

lib/wampproto/message.rb

@@ -1,5 +1,9 @@
 # frozen_string_literal: true
 
+require_relative "message/exceptions"
+require_relative "message/util"
+require_relative "message/validation_spec"
+
 require_relative "message/base"
 require_relative "message/hello"
 require_relative "message/welcome"

lib/wampproto/message/abort.rb

@@ -2,16 +2,65 @@
 
 module Wampproto
   module Message
+    # interface for abort fields
+    class IAbortFields
+      def details
+        raise NotImplementedError
+      end
+
+      def reason
+        raise NotImplementedError
+      end
+
+      def args
+        raise NotImplementedError
+      end
+
+      def kwargs
+        raise NotImplementedError
+      end
+    end
+
+    # abort fields
+    class AbortFields < IAbortFields
+      attr_reader :details, :reason, :args, :kwargs
+
+      def initialize(details, reason, *args, **kwargs)
+        super()
+        @details = details
+        @reason = reason
+        @args = args
+        @kwargs = kwargs
+      end
+    end
+
     # abort message
     class Abort < Base
       attr_reader :details, :reason, :args, :kwargs
 
+      TEXT = "ABORT"
+      VALIDATION_SPEC = Message::ValidationSpec.new(
+        3,
+        5,
+        TEXT,
+        {
+          1 => Message::Util.method(:validate_details),
+          2 => Message::Util.method(:validate_reason),
+          3 => Message::Util.method(:validate_args),
+          4 => Message::Util.method(:validate_kwargs)
+        }
+      )
+
       def initialize(details, reason, *args, **kwargs)
         super()
-        @details = Validate.hash!("Details", details)
-        @reason = Validate.string!("Reason", reason)
-        @args   = Validate.array!("Arguments", args)
-        @kwargs = Validate.hash!("Keyword Arguments", kwargs)
+        @details = details
+        @reason = reason
+        @args = args
+        @kwargs = kwargs
+      end
+
+      def self.with_fields(fields)
+        new(fields.details, fields.reason, *fields.args, **fields.kwargs)
       end
 
       def marshal
@@ -22,10 +71,10 @@ def marshal
       end
 
       def self.parse(wamp_message)
-        _type, details, reason, args, kwargs = wamp_message
-        args   ||= []
-        kwargs ||= {}
-        new(details, reason, *args, **kwargs)
+        fields = Util.validate_message(wamp_message, Type::ABORT, VALIDATION_SPEC)
+        fields.args ||= []
+        fields.kwargs ||= {}
+        Abort.with_fields(fields)
       end
     end
   end

lib/wampproto/message/exceptions.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+module Wampproto
+  module Message
+    module Exceptions
+      INVALID_DATA_TYPE_ERROR = "%<message>s: value at index %<index>s must be of type '%<expected_type>s'" \
+                                "but was %<actual_type>s"
+      INVALID_RANGE_ERROR = "%<message>s: value at index %<index>s must be between '%<start>s' and '%<end>s" \
+                            "but was %<actual>s"
+      INVALID_DETAIL_ERROR = "%<message>s: value at index %<index>s for key '%<key>s' must be of type" \
+                             "'%<expected_type>s' but was %<actual_type>s"
+    end
+  end
+end