Add SeamHttpInvalidInputError.get_validation_error_messages (#67)

* Add validation_errors prop and get_validation_error_messages method to SeamHttpInvalidInputError

* Test get_validation_error_messages

lib/seam/request.rb

@@ -54,7 +54,13 @@ def handle_error_response(response, _method, _uri)
         data: error["data"]
       }
 
-      raise SeamHttpInvalidInputError.new(error_details, status_code, request_id) if error_type == "invalid_input"
+      if error_type == "invalid_input"
+        error_details["validation_errors"] = error["validation_errors"]
+
+        raise SeamHttpInvalidInputError.new(
+          error_details, status_code, request_id
+        )
+      end
 
       raise SeamHttpApiError.new(error_details, status_code, request_id)
     end
@@ -97,9 +103,16 @@ def initialize(request_id)
   end
 
   class SeamHttpInvalidInputError < SeamHttpApiError
+    attr_reader :validation_errors
+
     def initialize(error, status_code, request_id)
       super(error, status_code, request_id)
       @code = "invalid_input"
+      @validation_errors = error["validation_errors"] || {}
+    end
+
+    def get_validation_error_messages(param_name)
+      @validation_errors.dig(param_name, "_errors") || []
     end
   end
 end

spec/seam_client/http_error_spec.rb

@@ -0,0 +1,52 @@
+require "spec_helper"
+
+RSpec.describe Seam::SeamHttpInvalidInputError do
+  let(:api_key) { "seam_apikey1_token" }
+  let(:client) { Seam::Client.new(api_key: api_key) }
+
+  describe "handling invalid input errors" do
+    let(:error_response) do
+      {
+        error: {
+          type: "invalid_input",
+          message: "Invalid input",
+          validation_errors: {
+            device_ids: {
+              _errors: ["Expected array, received number"]
+            }
+          }
+        }
+      }
+    end
+
+    it "raises SeamHttpInvalidInputError with correct validation messages" do
+      stub_seam_request(:post, "/devices/list",
+        error_response,
+        status: 400).with do |req|
+        req.body.source == {device_ids: 123}.to_json
+      end
+
+      expect {
+        client.devices.list(device_ids: 123)
+      }.to raise_error(Seam::SeamHttpInvalidInputError) do |error|
+        expect(error.code).to eq("invalid_input")
+        expect(error.status_code).to eq(400)
+        expect(error.get_validation_error_messages("device_ids")).to eq(["Expected array, received number"])
+      end
+    end
+
+    it "returns an empty array for non-existent validation errors" do
+      stub_seam_request(:post, "/devices/list",
+        error_response,
+        status: 400).with do |req|
+        req.body.source == {device_ids: 123}.to_json
+      end
+
+      begin
+        client.devices.list(device_ids: 123)
+      rescue Seam::SeamHttpInvalidInputError => error
+        expect(error.get_validation_error_messages("non_existent_field")).to eq([])
+      end
+    end
+  end
+end