Adds support for shipping address

- Adds pricing class support for shipping address
- Adds attachment procedure for shipping address
- Establlishes that shipping address holds precedence for billing address in tax calculations

Signed-off-by: Christopher Rogers <chrissrogers@gmail.com>

lib/recurly/pricing/attachment.js

@@ -59,11 +59,12 @@ export default class Attachment {
     const target = event.target || event.srcElement;
     const targetName = dom.data(target, 'recurly');
     const updating = name => event === INIT_RUN || targetName === name;
-    const updateAddress = updating('country') || updating('postal_code');
     const updateAddon = elems.addon && updating('addon');
+    const updateAddress = updating('country') || updating('postal_code');
     const updateCurrency = updating('currency');
     const updateCoupon = elems.coupon && (updating('coupon') || updating('plan'));
     const updateGiftcard = elems.gift_card && updating('gift_card');
+    const updateShippingAddress = updating('shipping_address.country') || updating('shipping_address.postal_code');
     const updateTax = updating('vat_number') || updating('tax_code');
 
     let pricing = this.pricing.plan(dom.value(elems.plan), { quantity: dom.value(elems.plan_quantity) });
@@ -94,11 +95,18 @@ export default class Attachment {
       pricing = pricing.giftcard(dom.value(elems.gift_card).trim()).then(null, ignoreNotFound);
     }
 
-    if (updateAddress) {
-      pricing = pricing.address({
-        country: dom.value(elems.country),
-        postal_code: dom.value(elems.postal_code)
-      });
+    if (updateShippingAddress || updateAddress) {
+      if ('shipping_address.country' in elems || 'shipping_address.postal_code' in elems) {
+        pricing = pricing.shippingAddress({
+          country: dom.value(elems['shipping_address.country']),
+          postal_code: dom.value(elems['shipping_address.postal_code'])
+        });
+      } else {
+        pricing = pricing.address({
+          country: dom.value(elems.country),
+          postal_code: dom.value(elems.postal_code)
+        });
+      }
     }
 
     if (updateTax) {

lib/recurly/pricing/calculations.js

@@ -93,7 +93,8 @@ Calculations.prototype.tax = function (done) {
   this.price.now.tax = 0;
   this.price.next.tax = 0;
 
-  var taxInfo = merge({}, this.items.address);
+  const address = this.items.shipping_address || this.items.address;
+  const taxInfo = merge({}, address);
 
   merge(taxInfo, this.items.tax);
 

lib/recurly/pricing/index.js

@@ -14,7 +14,8 @@ const PROPERTIES = [
   'coupon',
   'address',
   'currency',
-  'gift_card'
+  'gift_card',
+  'shipping_address'
 ];
 
 /**
@@ -341,6 +342,21 @@ export default class Pricing extends Emitter {
     return new PricingPromise(updateFactory(this, 'address', address), this).nodeify(done);
   }
 
+  /**
+   * Updates shipping address
+   *
+   * @param {Object} address
+   * @param {String} address.country
+   * @param {String|Number} address.postal_code
+   * @param {String} address.vat_number
+   * @param {Function} [done] callback
+   * @public
+   */
+
+  shippingAddress (address, done) {
+    return new PricingPromise(updateFactory(this, 'shipping_address', address), this).nodeify(done);
+  }
+
   /**
    * Updates tax info
    *

lib/recurly/pricing/promise.js

@@ -19,7 +19,8 @@ const pricingMethods = [
   'reset',
   'remove',
   'reprice',
-  'giftcard'
+  'giftcard',
+  'shipping_address'
 ];
 
 /**

test/pricing/pricing.test.js

@@ -139,6 +139,46 @@ describe('Recurly.Pricing', function () {
           done();
         });
     });
+
+    describe('with a shipping address', function () {
+      it('calculates tax from the shipping address', function (done) {
+        this.pricing
+          .plan('intermediate', { quantity: 1 })
+          .shippingAddress({
+            country: 'US',
+            postal_code: '94110'
+          })
+          .done(function (price) {
+            assert.equal(price.taxes.length, 1);
+            assert.equal(price.taxes[0].type, 'us');
+            assert.equal(price.taxes[0].rate, '0.0875');
+            assert.equal(price.now.tax, '1.93');
+            assert.equal(price.next.tax, '1.75');
+            done();
+          });
+      });
+
+      it('calculates tax from the shipping address when a billing address is given', function (done) {
+        this.pricing
+          .plan('intermediate', { quantity: 1 })
+          .address({
+            country: 'DE',
+            postal_code: 'XXX-XXX'
+          })
+          .shippingAddress({
+            country: 'US',
+            postal_code: '94110'
+          })
+          .done(function (price) {
+            assert.equal(price.taxes.length, 1);
+            assert.equal(price.taxes[0].type, 'us');
+            assert.equal(price.taxes[0].rate, '0.0875');
+            assert.equal(price.now.tax, '1.93');
+            assert.equal(price.next.tax, '1.75');
+            done();
+          });
+      })
+    });
   });
 
   describe('with usage addons', function() {