Add unit test for failing Enterprise Fee Summary

I observed this data but I'm unsure about the root cause. It could be
that the SQL query fetching this data needs tweaking to return the fee
name in this case or it could be that it's not available (deleted).

In any case, I thought I document what's happening and make this
summarizer more robust before looking into the query.

spec/lib/reports/enterprise_fee_summary/summarizer_spec.rb

@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+describe Reporting::Reports::EnterpriseFeeSummary::Summarizer do
+  let(:row) {
+    {
+      "total_amount" => 1, "payment_method_name" => nil,
+      "shipping_method_name" => nil, "hub_name" => "Kimchi Hub",
+      "enterprise_name" => nil, "fee_type" => nil,
+      "customer_name" => "Fermented Greens",
+      "customer_email" => "kimchi@example.com", "fee_name" => nil,
+      "tax_category_name" => nil,
+      "enterprise_fee_inherits_tax_category" => nil,
+      "product_tax_category_name" => nil,
+      "placement_enterprise_role" => nil,
+      "adjustment_adjustable_type" => nil,
+      "adjustment_source_distributor_name" => nil,
+      "incoming_exchange_enterprise_name" => nil,
+      "outgoing_exchange_enterprise_name" => nil,
+      "id" => nil
+    }
+  }
+
+  it "represents a transaction fee" do
+    data = row.merge(
+      "payment_method_name" => "cash",
+      "adjustment_adjustable_type" => "Spree::Payment",
+    )
+    summarizer = described_class.new(data)
+    expect(summarizer.fee_type).to eq "Payment Transaction"
+  end
+
+  it "represents an enterprise fee without name" do
+    pending "Enterprise Fee Summary report fails #10395"
+
+    data = row.merge(
+      "fee_name" => nil,
+      "placement_enterprise_role" => "coordinator",
+      "adjustment_adjustable_type" => "Spree::LineItem",
+    )
+    summarizer = described_class.new(data)
+    expect(summarizer.fee_type).to eq nil
+  end
+end