Invoice action required trigger (stripe#625)

* Invoice action required trigger

* Add expected error

pkg/fixtures/triggers.go

@@ -33,6 +33,7 @@ var Events = map[string]string{
 	"customer.subscription.updated":            "triggers/customer.subscription.updated.json",
 	"invoice.created":                          "triggers/invoice.created.json",
 	"invoice.finalized":                        "triggers/invoice.finalized.json",
+	"invoice.payment_action_required":          "triggers/invoice.payment_action_required.json",
 	"invoice.payment_failed":                   "triggers/invoice.payment_failed.json",
 	"invoice.payment_succeeded":                "triggers/invoice.payment_succeeded.json",
 	"invoice.updated":                          "triggers/invoice.updated.json",

pkg/fixtures/triggers/invoice.payment_action_required.json

@@ -0,0 +1,67 @@
+{
+  "_meta": {
+    "template_version": 0
+  },
+  "fixtures": [
+    {
+      "name": "customer",
+      "path": "/v1/customers",
+      "method": "post",
+      "params": {
+        "description": "(created by Stripe CLI)",
+        "source": "tok_visa"
+      }
+    },
+    {
+      "name": "invoiceitem",
+      "path": "/v1/invoiceitems",
+      "method": "post",
+      "params": {
+        "amount": 2000,
+        "currency": "usd",
+        "customer": "${customer:id}",
+        "description": "(created by Stripe CLI)"
+      }
+    },
+    {
+      "name": "invoice",
+      "path": "/v1/invoices",
+      "method": "post",
+      "params": {
+        "customer": "${customer:id}",
+        "description": "(created by Stripe CLI)"
+      }
+    },
+    {
+      "name": "payment_method",
+      "path": "/v1/payment_methods",
+      "method": "post",
+      "params": {
+        "type": "card",
+        "card": {
+          "exp_month": 7,
+          "exp_year": 25,
+          "number": "4000000000003220",
+          "cvc": "424"
+        }
+      }
+    },
+    {
+      "name": "attach_payment_method",
+      "path": "/v1/payment_methods/${payment_method:id}/attach",
+      "method": "post",
+      "params": {
+        "customer": "${customer:id}"
+      }
+    },
+    {
+      "name": "pay_invoice",
+      "path": "/v1/invoices/${invoice:id}/pay",
+      "method": "post",
+      "expected_error_type": "card_error",
+      "params": {
+        "payment_method": "${payment_method:id}"
+      }
+    }
+  ]
+}