2 files changed, 51 insertions, 1 deletions
diff --git a/spec/factories/card.rb b/spec/factories/card.rb
new file mode 100644
index 0000000..ddcafaf
--- /dev/null
+++ b/spec/factories/card.rb
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :card, class: 'Card' do
+    number { "#{rand(1000..9999)}-#{rand(1000..9999)}-#{rand(1000..9999)}-#{rand(1000..9999)}" }
+    expiration_day { rand(1..31) }
+    expiration_month { rand(1..12) }
+    expiration_year { rand(1971..2025) }
+    security_code { rand(100..999) }
+    user_account { create(:user_account) }
+  end
+end
diff --git a/spec/models/card_spec.rb b/spec/models/card_spec.rb
index 6f49b4a..11bee2d 100644
--- a/spec/models/card_spec.rb
+++ b/spec/models/card_spec.rb
@@ -1,5 +1,43 @@
+# frozen_string_literal: true
+
 require 'rails_helper'
 
 RSpec.describe Card, type: :model do
-  pending "add some examples to (or delete) #{__FILE__}"
+  let(:card) { build(:card) }
+
+  it { should belong_to(:user_account)}
+  it { should validate_presence_of(:number) }
+  it { should validate_presence_of(:security_code) }
+  it { should validate_presence_of(:expiration_year) }
+  it { should validate_presence_of(:expiration_month) }
+  it { should validate_presence_of(:expiration_day) }
+  it { should validate_numericality_of(:expiration_year) }
+
+  describe 'expiration_month' do
+    it "can't be less than 1 or greater than 12" do
+      card.expiration_month = 0
+      expect(card.save).to be_falsey
+      card.expiration_month = 13
+      expect(card.save).to be_falsey
+    end
+  end
+
+  describe 'expiration_day' do
+    it "can't be less than 1 or greater than 31" do
+      card.expiration_day = 0
+      expect(card.save).to be_falsey
+      card.expiration_day = 32
+      expect(card.save).to be_falsey
+    end
+  end
+
+  describe '#expiration_date' do
+    it 'renders the expiration date in a friendly format' do
+      card.expiration_year = 2025
+      card.expiration_month = 3
+      card.expiration_day = 24
+
+      expect(card.expiration_date).to eq('24/3/2025')
+    end
+  end
 end