From 5de07c194e85fa74e7d7f2be12e99cb9acad3ccc Mon Sep 17 00:00:00 2001
From: Harald Eilertsen <haraldei@anduin.net>
Date: Sat, 9 Sep 2017 17:37:13 +0200
Subject: Validate postcode properly.

Don't accept invalid postcodes, or postcodes containing invalid chars.
---
 lib/contact.rb                  | 27 +++++++++++++++++++--------
 spec/contact_spec.rb            | 29 +++++++++++++++++++++++++++++
 spec/spec_helper.rb             |  2 ++
 spec/support/contact_factory.rb | 12 ++++++++++++
 4 files changed, 62 insertions(+), 8 deletions(-)
 create mode 100644 spec/contact_spec.rb
 create mode 100644 spec/support/contact_factory.rb

diff --git a/lib/contact.rb b/lib/contact.rb
index ffa33bf..cb9a6e9 100644
--- a/lib/contact.rb
+++ b/lib/contact.rb
@@ -16,28 +16,39 @@ class Contact
     "#{@street}, #{@postcode} #{@city}"
   end
 
+  def valid?
+    validate!
+    @errors.length == 0
+  end
+
   def validate!
-    errors = []
+    @errors = []
     if @name.nil? || @name.strip.empty?
-      errors << "Du må oppgi en kontaktperson"
+      @errors << "Du må oppgi en kontaktperson"
     end
 
-    if @postcode.nil? || @postcode.strip.empty?
-      errors << "Du må oppgi et gyldig postnr."
+    unless valid_postcode
+      @errors << "Du må oppgi et gyldig postnr."
     end
 
     if @city.nil? || @city.strip.empty?
-      errors << "Du må oppgi poststed."
+      @errors << "Du må oppgi poststed."
     end
 
     if @phone.nil? || @phone.strip.empty?
-      errors << "Du må oppgi et telefonnummer"
+      @errors << "Du må oppgi et telefonnummer"
     end
 
     if @email.nil? || @email.strip.empty?
-      errors << "Du må oppgi en epostadresse"
+      @errors << "Du må oppgi en epostadresse"
     end
 
-    errors
+    @errors
+  end
+
+  private
+
+  def valid_postcode
+    @postcode && @postcode =~ /^\d{4}$/
   end
 end
diff --git a/spec/contact_spec.rb b/spec/contact_spec.rb
new file mode 100644
index 0000000..980626b
--- /dev/null
+++ b/spec/contact_spec.rb
@@ -0,0 +1,29 @@
+require 'spec_helper'
+
+describe Contact do
+  let(:params) { create_contact_params }
+
+  it "rejects empty postcodes" do
+    params.delete('postcode')
+    @contact = Contact.new(params)
+    expect(@contact.valid?).to be(false)
+  end
+
+  it "rejects too short postcodes" do
+    params['postcode'] = '123'
+    @contact = Contact.new(params)
+    expect(@contact.valid?).to be(false)
+  end
+
+  it "rejects too long postcodes" do
+    params['postcode'] = '12345'
+    @contact = Contact.new(params)
+    expect(@contact.valid?).to be(false)
+  end
+
+  it "rejects postcodes wiht invalid chars" do
+    params['postcode'] = '123s'
+    @contact = Contact.new(params)
+    expect(@contact.valid?).to be(false)
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index cd9f3f3..293bd8e 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -2,11 +2,13 @@ ENV['RACK_ENV'] = 'test'
 
 require_relative '../registration'
 require_relative 'support/band_factory'
+require_relative 'support/contact_factory'
 require_relative 'support/submit_form_helper'
 require 'capybara/rspec'
 
 RSpec.configure do |config|
   config.include BandFactory
+  config.include ContactFactory
   config.include SubmitFormHelper
 
   config.before(:example) do
diff --git a/spec/support/contact_factory.rb b/spec/support/contact_factory.rb
new file mode 100644
index 0000000..f05e9a1
--- /dev/null
+++ b/spec/support/contact_factory.rb
@@ -0,0 +1,12 @@
+module ContactFactory
+  def create_contact_params(params = {})
+    par = {
+      'name' => 'Contact Name',
+      'street' => "Streetname 666",
+      'postcode' => "1234",
+      'city' => "Someplace Nice",
+      'phone' => '98765432',
+      'email' => 'band@example.com',
+    }.merge(params)
+  end
+end
-- 
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