creating sync with billing

test/integration/eis_billing/payment_status_test.rb

@@ -9,10 +9,7 @@ class PaymentStatusTest < ApplicationIntegrationTest
     Spy.on_instance_method(EisBilling::BaseController, :authorized).and_return(true)
   end
 
-  def shoudl_update_buyer_balance
-    assert @invoice.paid?
-    assert_equal @invoice.buyer.balance.to_f, 100.0
-
+  test 'should mark an invoice as paid' do
     payload = {
       payment_state: 'settled',
       order_reference: @unpaid.number,
@@ -20,13 +17,57 @@ class PaymentStatusTest < ApplicationIntegrationTest
       transaction_time: Time.zone.now,
     }
 
-    put eis_billing_payment_status_path, params: payload
+    item = @unpaid.items.first
 
-    @invoice.reload
-    @invoice.buyer.reload
-    @registrar.reload
+    refute @unpaid.paid?
+    assert_equal @unpaid.buyer.balance.to_f, 100.0
+    assert_equal item.price, 5.0
+
+    put eis_billing_payment_status_path, params: payload
+    @unpaid.reload
+    assert_equal @unpaid.buyer.balance.to_f, 105.0
+  end
+
+  test 'ignore additonal callbacks if invoice is already paid' do
+    payload = {
+      payment_state: 'settled',
+      order_reference: @unpaid.number,
+      standing_amount: @unpaid.total,
+      transaction_time: Time.zone.now,
+    }
+
+    item = @unpaid.items.first
+
+    refute @unpaid.paid?
+    assert_equal @unpaid.buyer.balance.to_f, 100.0
+    assert_equal item.price, 5.0
+
+    put eis_billing_payment_status_path, params: payload
+    @unpaid.reload
+    assert_equal @unpaid.buyer.balance.to_f, 105.0
+    assert @unpaid.paid?
+
+    put eis_billing_payment_status_path, params: payload
+    @unpaid.reload
+
+    assert_equal @unpaid.buyer.balance.to_f, 105.0
+    assert @unpaid.paid?
+  end
+
+  test 'send callback to already paid invoice' do
+    payload = {
+      payment_state: 'settled',
+      order_reference: @invoice.number,
+      standing_amount: @invoice.total,
+      transaction_time: Time.zone.now,
+    }
 
     assert @invoice.paid?
     assert_equal @invoice.buyer.balance.to_f, 100.0
+
+    put eis_billing_payment_status_path, params: payload
+    @invoice.reload
+    assert_equal @invoice.buyer.balance.to_f, 100.0
+    assert @invoice.paid?
   end
 end