some tests and a helper method

lib/validators/phony_validator.rb

@@ -9,4 +9,16 @@ def validate_each(record, attribute, value)
     record.errors[attribute] << (options[:message] || "is an invalid number") if not Phony.plausible?(value)
   end
 
-end
+end
+
+module ActiveModel
+  module Validations
+    module HelperMethods
+
+      def validates_plausible_phone(*attr_names)
+        validates_with PhonyPlausibleValidator, _merge_attributes(attr_names)
+      end
+
+    end
+  end
+end

spec/lib/phony_validator_spec.rb

@@ -0,0 +1,60 @@
+require 'spec_helper'
+
+ActiveRecord::Schema.define do
+  create_table :validating_homes do |table|
+    table.column :phone_number, :string
+    table.column :fax_number, :string
+  end
+end
+
+class ValidatingHome < ActiveRecord::Base
+  attr_accessor :phone_method, :fax_number
+  validates :phone_number, :phony_plausible => true
+  validates_plausible_phone :fax_number
+end
+
+
+
+describe PhonyPlausibleValidator do
+
+  describe 'validates' do
+    before(:each) do
+      @home = ValidatingHome.new
+    end
+
+    it "should validate an empty number" do
+      @home.should be_valid
+    end
+
+    it "should validate a valid number" do
+      @home.phone_number = '123456789'
+      @home.should be_valid
+    end
+
+    it "should invalidate an invalid number" do
+      @home.phone_number = '123456789 123456789 123456789 123456789'
+      @home.should_not be_valid
+    end
+  end
+
+  describe 'validates_plausible_phone' do
+    before(:each) do
+      @home = ValidatingHome.new
+    end
+
+    it "should validate an empty number" do
+      @home.should be_valid
+    end
+
+    it "should validate a valid number" do
+      @home.fax_number = '123456789'
+      @home.should be_valid
+    end
+
+    it "should invalidate an invalid number" do
+      @home.fax_number = '123456789 123456789 123456789 123456789'
+      @home.should_not be_valid
+    end
+  end
+
+end