Add dummy calculator

This implements the interface required by Solidus, however it currently
just reports no taxes.

1 files changed, 21 insertions, 0 deletions

diff --git a/spec/super_good/solidus_taxjar/tax_calculator_spec.rb b/spec/super_good/solidus_taxjar/tax_calculator_spec.rb
new file mode 100644
index 0000000..eaf810c
--- /dev/null
+++ b/spec/super_good/solidus_taxjar/tax_calculator_spec.rb
@@ -0,0 +1,21 @@
+require 'spec_helper'
+
+RSpec.describe SuperGood::SolidusTaxJar::TaxCalculator do
+  describe "#calculate" do
+    subject { calculator.calculate }
+
+    let(:calculator) { described_class.new(order) }
+
+    let(:order) do
+      Spree::Order.new(
+        id: 10
+      )
+    end
+
+    it "returns the taxes" do
+      expect(subject.order_id).to eq order.id
+      expect(subject.line_item_taxes).to be_empty
+      expect(subject.shipment_taxes).to be_empty
+    end
+  end
+end