Adyen: Fix error_code_from for unknown errors

Updated `error_code_from` to respond with default gateway error code in
case error is not listed in `STANDARD_ERROR_CODE_MAPPING`.

CE-2512

Remote:
123 tests, 440 assertions, 2 failures, 0 errors, 0 pendings, 0 omissions, 0 notifications
98.374% passed

Unit:
5146 tests, 75480 assertions, 0 failures, 0 errors, 0 pendings, 0 omissions, 0 notifications
100% passed

Rubocop:
739 files inspected, no offenses detected

CHANGELOG

@@ -61,6 +61,7 @@
 * CyberSource: Update and fix test coverage [peteroas] #4374
 * Airwallex: QA fixes for address and create_setup_intent handling [therufs] #4377
 * Airwallex: add `descriptor` field and update logic for sending `request_id` and `merchant_order_id` [dsmcclain] #4379
+* Adyen: Fix `error_code_from` implementation [ajawadmirza] #4381
 
 == Version 1.125.0 (January 20, 2022)
 * Wompi: support gateway [therufs] #4173

lib/active_merchant/billing/gateways/adyen.rb

@@ -672,7 +672,7 @@ def post_data(action, parameters = {})
       end
 
       def error_code_from(response)
-        STANDARD_ERROR_CODE_MAPPING[response['errorCode']]
+        STANDARD_ERROR_CODE_MAPPING[response['errorCode']] || response['errorCode']
       end
 
       def network_transaction_id_from(response)

test/remote/gateways/remote_adyen_test.rb

@@ -638,6 +638,24 @@ def test_successful_authorize_and_capture_with_unionpay_card
     assert_equal '[capture-received]', capture.message
   end
 
+  def test_error_code_render_from_response
+    options = {
+      order_id: '123',
+      email: '[email protected]',
+      billing_address: {
+        address2: 'address2',
+        zip: '31331',
+        city: 'Wanaque',
+        state: 'NJ',
+        country: 'IE'
+      },
+      delivery_date: 'invalid'
+    }
+    response = @gateway.authorize(@amount, @credit_card, options)
+    assert_failure response
+    assert_equal '702', response.error_code
+  end
+
   def test_partial_capture
     auth = @gateway.authorize(@amount, @credit_card, @options)
     assert_success auth

test/unit/gateways/adyen_test.rb

@@ -242,6 +242,22 @@ def test_failed_authorize
     assert_failure response
   end
 
+  def test_standard_error_code_mapping
+    @gateway.expects(:ssl_post).returns(failed_billing_field_response)
+
+    response = @gateway.authorize(@amount, @credit_card, @options)
+    assert_failure response
+    assert_equal 'incorrect_address', response.error_code
+  end
+
+  def test_unknown_error_code_mapping
+    @gateway.expects(:ssl_post).returns(failed_invalid_delivery_field_response)
+
+    response = @gateway.authorize(@amount, @credit_card, @options)
+    assert_failure response
+    assert_equal '702', response.error_code
+  end
+
   def test_failed_authorise3d
     @gateway.expects(:ssl_post).returns(failed_authorize_response)
 
@@ -1608,6 +1624,28 @@ def successful_verify_response
     RESPONSE
   end
 
+  def failed_billing_field_response
+    <<~RESPONSE
+      {
+        "status": 422,
+        "errorCode": "132",
+        "message": "Required field 'billingAddress.street' is not provided.",
+        "errorType": "validation"
+      }
+    RESPONSE
+  end
+
+  def failed_invalid_delivery_field_response
+    <<~RESPONSE
+      {
+        "status": 500,
+        "errorCode": "702",
+        "message": "The 'deliveryDate' field is invalid. Invalid date (year)",
+        "errorType": "validation"
+      }
+    RESPONSE
+  end
+
   def failed_verify_response
     <<-RESPONSE
     {