Initial commit

spec/support/matchers/validate_attachment_of.rb

@@ -0,0 +1,45 @@
+require "rspec/expectations"
+
+RSpec::Matchers.define :validate_attachment_of do |attr_name|
+  match do |record| 
+    matcher.matches?(record, attr_name)
+  end
+
+  chain :on do |validation_context|
+    matcher.on(validation_context)
+  end
+
+  chain :with_message do |message|
+    matcher.with_message(message)
+  end
+
+  private
+
+  def matcher
+    @matcher ||= ValidateAttachmentOfMatcher.new
+  end
+
+  class ValidateAttachmentOfMatcher
+    def on(validation_context)
+      @validation_context = validation_context
+    end
+
+    def with_message(message)
+      @message = message
+    end
+
+    def matches?(record, attr_name)
+      record.send(attr_name).purge
+      record.valid?(validation_context)
+      record.errors[attr_name].include? message
+    end
+    
+    private
+
+    attr_reader :validation_context
+
+    def message
+      @message || I18n.translate("activerecord.errors.messages.attached")
+    end
+  end
+end