4 files changed, 73 insertions, 0 deletions
diff --git a/lib/super_good/solidus_taxjar/api.rb b/lib/super_good/solidus_taxjar/api.rb
index 61fecae..7309a64 100644
--- a/lib/super_good/solidus_taxjar/api.rb
+++ b/lib/super_good/solidus_taxjar/api.rb
@@ -32,6 +32,10 @@ module SuperGood
         taxjar_client.delete_order order.number
       end
 
+      def create_refund_for(reimbursement)
+        taxjar_client.create_refund APIParams.refund_params(reimbursement)
+      end
+
       private
 
       attr_reader :taxjar_client
diff --git a/lib/super_good/solidus_taxjar/api_params.rb b/lib/super_good/solidus_taxjar/api_params.rb
index f75713c..b848eee 100644
--- a/lib/super_good/solidus_taxjar/api_params.rb
+++ b/lib/super_good/solidus_taxjar/api_params.rb
@@ -33,6 +33,21 @@ module SuperGood
             )
         end
 
+        def refund_params(reimbursement)
+          additional_taxes = reimbursement.return_items.sum(&:additional_tax_total)
+
+          {}
+            .merge(order_address_params(reimbursement.order.tax_address))
+            .merge(
+              transaction_id: reimbursement.number,
+              transaction_reference_id: reimbursement.order.number,
+              transaction_date: reimbursement.order.completed_at.to_formatted_s(:iso8601),
+              amount: reimbursement.total - additional_taxes,
+              shipping: 0,
+              sales_tax: additional_taxes
+            )
+        end
+
         private
 
         def order_address_params(address)
diff --git a/spec/super_good/solidus_taxjar/api_params_spec.rb b/spec/super_good/solidus_taxjar/api_params_spec.rb
index cb70804..8b0e9d0 100644
--- a/spec/super_good/solidus_taxjar/api_params_spec.rb
+++ b/spec/super_good/solidus_taxjar/api_params_spec.rb
@@ -104,6 +104,18 @@ RSpec.describe SuperGood::SolidusTaxJar::APIParams do
     )
   end
 
+  let(:reimbursement) do
+    Spree::Reimbursement.new(
+      order: order,
+      total: 333.33,
+      number: "RI123123123",
+      return_items: [
+        Spree::ReturnItem.new(additional_tax_total: 0.33),
+        Spree::ReturnItem.new(additional_tax_total: 33.0)
+      ]
+    )
+  end
+
   describe "#order_params" do
     subject { described_class.order_params(order) }
 
@@ -162,4 +174,24 @@ RSpec.describe SuperGood::SolidusTaxJar::APIParams do
       })
     end
   end
+
+  describe "#refund_params" do
+    subject { described_class.refund_params(reimbursement) }
+
+    it "returns params for creating/updatingin a refund" do
+      expect(subject).to eq({
+        amount: BigDecimal("300.00"),
+        sales_tax: BigDecimal("33.33"),
+        shipping: 0,
+        to_city: "Los Angeles",
+        to_country: "US",
+        to_state: "CA",
+        to_street: "475 N Beverly Dr",
+        to_zip: "90210",
+        transaction_date: "2018-03-06T12:10:33Z",
+        transaction_id: "RI123123123",
+        transaction_reference_id: "R111222333",
+      })
+    end
+  end
 end
diff --git a/spec/super_good/solidus_taxjar/api_spec.rb b/spec/super_good/solidus_taxjar/api_spec.rb
index 64f017d..0f890ca 100644
--- a/spec/super_good/solidus_taxjar/api_spec.rb
+++ b/spec/super_good/solidus_taxjar/api_spec.rb
@@ -105,4 +105,26 @@ RSpec.describe SuperGood::SolidusTaxJar::API do
 
     it { is_expected.to eq({ some_kind_of: "response" }) }
   end
+
+  describe "#create_refund_for" do
+    subject { api.create_refund_for reimbursement }
+
+    let(:api) { described_class.new(taxjar_client: dummy_client) }
+    let(:dummy_client) { instance_double ::Taxjar::Client }
+    let(:reimbursement) { Spree::Reimbursement.new }
+
+    before do
+      allow(SuperGood::SolidusTaxJar::APIParams)
+        .to receive(:refund_params)
+        .with(reimbursement)
+        .and_return({ refund: "params" })
+
+      allow(dummy_client)
+        .to receive(:create_refund)
+        .with({ refund: "params" })
+        .and_return({ some_kind_of: "response" })
+    end
+
+    it { is_expected.to eq({ some_kind_of: "response" }) }
+  end
 end