add requests test for favorite merchant and date merchant by items sold

app/controllers/api/v1/merchants/customers_with_pending_invoices_controller.rb

@@ -0,0 +1,7 @@
+class Api::V1::Merchants::CustomersWithPendingInvoicesController < ApplicationController
+
+  def index
+    render json: Merchant.customers_with_pending_invoices(params[:merchant_id])
+  end
+
+end

app/models/merchant.rb

@@ -38,6 +38,7 @@ def self.top_merchants_by_items_sold(number)
 
   def customers_with_pending_invoices
     customers.where(id: invoices.pending.pluck('DISTINCT customer_id')).uniq
+    # ActiveRecord::Base.connection.execute("SELECT * FROM customers WHERE customers.id IN (SELECT customer_id  FROM invoices WHERE invoices.merchant_id = #{merchant_id.to_i} AND NOT EXISTS (SELECT * FROM transactions WHERE transactions.invoice_id = invoices.id AND transactions.result = 'success'))")
   end
 
 end

coverage/.last_run.json

@@ -1,5 +1,5 @@
 {
   "result": {
-    "covered_percent": 95.38
+    "covered_percent": 96.25
   }
 }