Fail gracefully on DFC product import errors

app/controllers/admin/dfc_product_imports_controller.rb

@@ -38,6 +38,11 @@ def index
       end
 
       @count = imported.compact.count
+    rescue Faraday::Error,
+           Addressable::URI::InvalidURIError,
+           ActionController::ParameterMissing => e
+      flash[:error] = e.message
+      redirect_to admin_product_import_path
     end
 
     private

engines/dfc_provider/spec/services/supplied_product_builder_spec.rb

@@ -111,6 +111,31 @@
     end
   end
 
+  describe ".update_product" do
+    let(:subject) { builder.update_product(product, variant) }
+    let(:product) {
+      DfcIo.import(product_json).find do |subject|
+        subject.is_a? DataFoodConsortium::Connector::SuppliedProduct
+      end
+    }
+    let(:product_json) { ExampleJson.read("product.GET") }
+
+    it "updates a variant" do
+      variant # Create test data first
+
+      expect { subject }.not_to change {
+        Spree::Variant.count
+      }
+
+      expect(subject).to eq variant
+      expect(subject.display_name).to eq "Fillet Steak - 201g x 1 Steak"
+      expect(subject.variant_unit).to eq "items"
+      expect(subject.unit_value).to eq 1
+      expect(subject.on_demand).to eq false
+      expect(subject.on_hand).to eq 11
+    end
+  end
+
   describe ".import_product" do
     let(:supplied_product) do
       DfcProvider::SuppliedProduct.new(

spec/system/admin/dfc_product_import_spec.rb

@@ -66,12 +66,41 @@
     }.to change { enterprise.supplied_products.count }
       .and change { linked_variant.display_name }
       .and change { linked_variant.unit_value }
-      .and change { linked_variant.price }
+      .and change { linked_variant.price }.to(2.09)
+      .and change { linked_variant.on_demand }.to(true)
+      .and change { linked_variant.on_hand }.by(0)
 
     expect(page).to have_content "Importing a DFC product catalog"
 
     product = Spree::Product.last
     expect(product.variants[0].semantic_links).to be_present
     expect(product.image).to be_present
   end
+
+  it "fails gracefully" do
+    user.oidc_account.update!(
+      uid: "anonymous@example.net",
+      updated_at: 1.minute.ago,
+    )
+    url = "https://example.net/unauthorized"
+    stub_request(:get, url).to_return(status: [401, "Unauthorized"])
+
+    visit admin_product_import_path
+    select enterprise.name, from: "Enterprise"
+    fill_in "catalog_url", with: url
+
+    expect { click_button "Import" }.not_to change { Spree::Variant.count }
+
+    expect(page).to have_content "the server responded with status 401"
+
+    select enterprise.name, from: "Enterprise"
+    fill_in "catalog_url", with: "badurl"
+    click_button "Import"
+    expect(page).to have_content "Absolute URI missing hierarchical segment: 'http://:80'"
+
+    select enterprise.name, from: "Enterprise"
+    fill_in "catalog_url", with: ""
+    click_button "Import"
+    expect(page).to have_content "param is missing or the value is empty: catalog_url"
+  end
 end