Add GoodSmallTextValidator

app/validators/good_small_text_validator.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+class GoodSmallTextValidator < GoodTextValidator
+  class Validation < Validation
+    MIN = 1
+    MAX = 255
+
+    def perform
+      super
+      error! :too_short, count: MIN if value.to_s.length < MIN
+      error! :too_long,  count: MAX if value.to_s.length > MAX
+    end
+  end
+end

spec/validators/good_small_text_validator_spec.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe GoodSmallTextValidator do
+  pending "add some examples to (or delete) #{__FILE__}"
+end