add more tests

spec/factories/payments.rb

@@ -0,0 +1,11 @@
+FactoryGirl.define do
+  factory :payment do
+    first_name { "#{Faker::Hipster.word} abc" }
+    last_name { "#{Faker::Hipster.word} xyz" }
+    credit_card_number { '4242424242424242' }
+    card_verification_value { '123' }
+    expiration_month { '06' }
+    expiration_year { Date.current.year + 2 }
+    amount { '10' }
+  end
+end