1 files changed, 66 insertions, 0 deletions
diff --git a/packages/contract-wrappers/test/calldata_optimization_utils_test.ts b/packages/contract-wrappers/test/calldata_optimization_utils_test.ts
new file mode 100644
index 000000000..107d913ba
--- /dev/null
+++ b/packages/contract-wrappers/test/calldata_optimization_utils_test.ts
@@ -0,0 +1,66 @@
+import { orderFactory } from '@0xproject/order-utils';
+import * as chai from 'chai';
+import * as _ from 'lodash';
+import 'mocha';
+
+import { constants } from '../src/utils/constants';
+import { calldataOptimizationUtils } from '../src/utils/calldata_optimization_utils';
+
+import { chaiSetup } from './utils/chai_setup';
+import { assert } from '../src/utils/assert';
+import { NULL_BYTES } from '@0xproject/utils';
+
+chaiSetup.configure();
+const expect = chai.expect;
+
+// utility for generating a set of order objects with mostly NULL values
+// except for a specified makerAssetData and takerAssetData
+const FAKE_ORDERS_COUNT = 5;
+const generateFakeOrders = (makerAssetData: string, takerAssetData: string) =>
+    _.map(_.range(FAKE_ORDERS_COUNT), index => {
+        const order = orderFactory.createOrder(
+            constants.NULL_ADDRESS,
+            constants.NULL_ADDRESS,
+            constants.NULL_ADDRESS,
+            constants.ZERO_AMOUNT,
+            constants.ZERO_AMOUNT,
+            constants.ZERO_AMOUNT,
+            makerAssetData,
+            constants.ZERO_AMOUNT,
+            takerAssetData,
+            constants.NULL_ADDRESS,
+            constants.NULL_ADDRESS,
+        );
+        return {
+            ...order,
+            signature: 'dummy signature',
+        };
+    });
+
+describe('calldataOptimizationUtils', () => {
+    const fakeMakerAssetData = 'fakeMakerAssetData';
+    const fakeTakerAssetData = 'fakeTakerAssetData';
+    const orders = generateFakeOrders(fakeMakerAssetData, fakeTakerAssetData);
+    describe('#optimizeForwarderOrders', () => {
+        it('should make makerAssetData `0x` unless first order', () => {
+            const optimizedOrders = calldataOptimizationUtils.optimizeForwarderOrders(orders);
+            expect(optimizedOrders[0].makerAssetData).to.equal(fakeMakerAssetData);
+            const ordersWithoutHead = _.slice(optimizedOrders, 1);
+            _.forEach(ordersWithoutHead, order => expect(order.makerAssetData).to.equal(constants.NULL_BYTES));
+        });
+        it('should make all takerAssetData `0x`', () => {
+            const optimizedOrders = calldataOptimizationUtils.optimizeForwarderOrders(orders);
+            _.forEach(optimizedOrders, order => expect(order.takerAssetData).to.equal(constants.NULL_BYTES));
+        });
+    });
+    describe('#optimizeForwarderFeeOrders', () => {
+        it('should make all makerAssetData `0x`', () => {
+            const optimizedOrders = calldataOptimizationUtils.optimizeForwarderFeeOrders(orders);
+            _.forEach(optimizedOrders, order => expect(order.makerAssetData).to.equal(constants.NULL_BYTES));
+        });
+        it('should make all takerAssetData `0x`', () => {
+            const optimizedOrders = calldataOptimizationUtils.optimizeForwarderFeeOrders(orders);
+            _.forEach(optimizedOrders, order => expect(order.takerAssetData).to.equal(constants.NULL_BYTES));
+        });
+    });
+});