added tests

packages/asset-swapper/test/utils_test.ts

@@ -0,0 +1,78 @@
+import { orderFactory } from '@0x/order-utils/lib/src/order_factory';
+import { SignedOrder } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import { Web3Wrapper } from '@0x/web3-wrapper';
+import * as chai from 'chai';
+import 'mocha';
+
+import { constants } from '../src/constants';
+import { utils } from '../src/utils/utils';
+
+import { chaiSetup } from './utils/chai_setup';
+
+chaiSetup.configure();
+const expect = chai.expect;
+
+const TOKEN_DECIMALS = 18;
+const WETH_DECIMALS = constants.ETHER_TOKEN_DECIMALS;
+
+const baseUnitAmount = (unitAmount: number, decimals = TOKEN_DECIMALS): BigNumber => {
+    return Web3Wrapper.toBaseUnitAmount(new BigNumber(unitAmount), decimals);
+};
+
+// tslint:disable:custom-no-magic-numbers
+describe('utils', () => {
+    // orders
+    const sellTwoTokensFor1Weth: SignedOrder = orderFactory.createSignedOrderFromPartial({
+        makerAssetAmount: baseUnitAmount(2),
+        takerAssetAmount: baseUnitAmount(1, WETH_DECIMALS),
+    });
+    const sellTenTokensFor10Weth: SignedOrder = orderFactory.createSignedOrderFromPartial({
+        makerAssetAmount: baseUnitAmount(10),
+        takerAssetAmount: baseUnitAmount(10, WETH_DECIMALS),
+    });
+    const sellTwoTokensFor1WethWithTwoTokenFee: SignedOrder = orderFactory.createSignedOrderFromPartial({
+        makerAssetAmount: baseUnitAmount(2),
+        takerAssetAmount: baseUnitAmount(1, WETH_DECIMALS),
+        takerFee: baseUnitAmount(2),
+    });
+    const sellTenTokensFor1WethWithFourTokenFee: SignedOrder = orderFactory.createSignedOrderFromPartial({
+        makerAssetAmount: baseUnitAmount(2),
+        takerAssetAmount: baseUnitAmount(1, WETH_DECIMALS),
+        takerFee: baseUnitAmount(4),
+    });
+    describe('isFeeOrdersRequiredToFillOrders', async () => {
+        it('should return true if ordersAndFillableAmounts is completed unfilled and has fees', () => {
+            const ordersAndFillableAmounts = {
+                orders: [sellTwoTokensFor1WethWithTwoTokenFee, sellTenTokensFor1WethWithFourTokenFee],
+                remainingFillableMakerAssetAmounts: [baseUnitAmount(1), baseUnitAmount(10)],
+            };
+            const isFeeOrdersRequired = utils.isFeeOrdersRequiredToFillOrders(ordersAndFillableAmounts);
+            expect(isFeeOrdersRequired).to.equal(true);
+        });
+        it('should return true if ordersAndFillableAmounts is partially unfilled and has fees', () => {
+            const ordersAndFillableAmounts = {
+                orders: [sellTwoTokensFor1WethWithTwoTokenFee, sellTenTokensFor1WethWithFourTokenFee],
+                remainingFillableMakerAssetAmounts: [baseUnitAmount(0), baseUnitAmount(5)],
+            };
+            const isFeeOrdersRequired = utils.isFeeOrdersRequiredToFillOrders(ordersAndFillableAmounts);
+            expect(isFeeOrdersRequired).to.equal(true);
+        });
+        it('should return false if ordersAndFillableAmounts is completed filled and has fees', () => {
+            const ordersAndFillableAmounts = {
+                orders: [sellTwoTokensFor1WethWithTwoTokenFee, sellTenTokensFor1WethWithFourTokenFee],
+                remainingFillableMakerAssetAmounts: [baseUnitAmount(0), baseUnitAmount(0)],
+            };
+            const isFeeOrdersRequired = utils.isFeeOrdersRequiredToFillOrders(ordersAndFillableAmounts);
+            expect(isFeeOrdersRequired).to.equal(false);
+        });
+        it('should return false if ordersAndFillableAmounts is completely unfilled and doesn\'t have fees', () => {
+            const ordersAndFillableAmounts = {
+                orders: [sellTwoTokensFor1Weth, sellTenTokensFor10Weth],
+                remainingFillableMakerAssetAmounts: [baseUnitAmount(1), baseUnitAmount(10)],
+            };
+            const isFeeOrdersRequired = utils.isFeeOrdersRequiredToFillOrders(ordersAndFillableAmounts);
+            expect(isFeeOrdersRequired).to.equal(false);
+        });
+    });
+});