Switch over to Lerna + Yarn Workspaces setup for a mono-repo approach

packages/0x.js/test/assert_test.ts

@@ -0,0 +1,34 @@
+import * as chai from 'chai';
+import 'mocha';
+import {ZeroEx} from '../src';
+import {assert} from '../src/utils/assert';
+import {web3Factory} from './utils/web3_factory';
+
+const expect = chai.expect;
+
+describe('Assertion library', () => {
+    const web3 = web3Factory.create();
+    const zeroEx = new ZeroEx(web3.currentProvider);
+    describe('#isSenderAddressHexAsync', () => {
+        it('throws when address is invalid', async () => {
+            const address = '0xdeadbeef';
+            const varName = 'address';
+            return expect(assert.isSenderAddressAsync(varName, address, (zeroEx as any)._web3Wrapper))
+                .to.be.rejectedWith(`Expected ${varName} to be of type ETHAddressHex, encountered: ${address}`);
+        });
+        it('throws when address is unavailable', async () => {
+            const validUnrelatedAddress = '0x8b0292b11a196601eddce54b665cafeca0347d42';
+            const varName = 'address';
+            return expect(assert.isSenderAddressAsync(varName, validUnrelatedAddress, (zeroEx as any)._web3Wrapper))
+                .to.be.rejectedWith(
+                    `Specified ${varName} ${validUnrelatedAddress} isn't available through the supplied web3 provider`,
+                );
+        });
+        it('doesn\'t throw if address is available', async () => {
+            const availableAddress = (await zeroEx.getAvailableAddressesAsync())[0];
+            const varName = 'address';
+            return expect(assert.isSenderAddressAsync(varName, availableAddress, (zeroEx as any)._web3Wrapper))
+                .to.become(undefined);
+        });
+    });
+});