1 files changed, 95 insertions, 0 deletions
diff --git a/test/exchange_wrapper.ts b/test/exchange_wrapper.ts
new file mode 100644
index 000000000..4bfc49374
--- /dev/null
+++ b/test/exchange_wrapper.ts
@@ -0,0 +1,95 @@
+import 'mocha';
+import * as chai from 'chai';
+import chaiAsPromised = require('chai-as-promised');
+import * as Web3 from 'web3';
+import {web3Factory} from './utils/web3_factory';
+import {ZeroEx} from '../src/0x.js';
+import {BlockchainLifecycle} from './utils/blockchain_lifecycle';
+
+const expect = chai.expect;
+chai.use(chaiAsPromised);
+const blockchainLifecycle = new BlockchainLifecycle();
+
+describe('ExchangeWrapper', () => {
+    let zeroEx: ZeroEx;
+    before(async () => {
+        const web3 = web3Factory.create();
+        zeroEx = new ZeroEx(web3);
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    describe('#isValidSignatureAsync', () => {
+        // The Exchange smart contract `isValidSignature` method only validates orderHashes and assumes
+        // the length of the data is exactly 32 bytes. Thus for these tests, we use data of this size.
+        const dataHex = '0x6927e990021d23b1eb7b8789f6a6feaf98fe104bb0cf8259421b79f9a34222b0';
+        const signature = {
+            v: 27,
+            r: '0x61a3ed31b43c8780e905a260a35faefcc527be7516aa11c0256729b5b351bc33',
+            s: '0x40349190569279751135161d22529dc25add4f6069af05be04cacbda2ace2254',
+        };
+        const address = '0x5409ed021d9299bf6814279a6a1411a7e866a631';
+        describe('should throw if passed a malformed signature', () => {
+            it('malformed v', async () => {
+                const malformedSignature = {
+                    v: 34,
+                    r: signature.r,
+                    s: signature.s,
+                };
+                expect(zeroEx.exchange.isValidSignatureAsync(dataHex, malformedSignature, address))
+                    .to.be.rejected;
+            });
+            it('r lacks 0x prefix', () => {
+                const malformedR = signature.r.replace('0x', '');
+                const malformedSignature = {
+                    v: signature.v,
+                    r: malformedR,
+                    s: signature.s,
+                };
+                expect(zeroEx.exchange.isValidSignatureAsync(dataHex, malformedSignature, address))
+                    .to.be.rejected;
+            });
+            it('r is too short', () => {
+                const malformedR = signature.r.substr(10);
+                const malformedSignature = {
+                    v: signature.v,
+                    r: malformedR,
+                    s: signature.s.replace('0', 'z'),
+                };
+                expect(zeroEx.exchange.isValidSignatureAsync(dataHex, malformedSignature, address))
+                    .to.be.rejected;
+            });
+            it('s is not hex', () => {
+                const malformedS = signature.s.replace('0', 'z');
+                const malformedSignature = {
+                    v: signature.v,
+                    r: signature.r,
+                    s: malformedS,
+                };
+                expect(zeroEx.exchange.isValidSignatureAsync(dataHex, malformedSignature, address))
+                    .to.be.rejected;
+            });
+        });
+        it('should return false if the data doesn\'t pertain to the signature & address', async () => {
+            const isValid = await zeroEx.exchange.isValidSignatureAsync('0x0', signature, address);
+            expect(isValid).to.be.false;
+        });
+        it('should return false if the address doesn\'t pertain to the signature & dataHex', async () => {
+            const validUnrelatedAddress = '0x8b0292B11a196601eD2ce54B665CaFEca0347D42';
+            const isValid = await zeroEx.exchange.isValidSignatureAsync(dataHex, signature, validUnrelatedAddress);
+            expect(isValid).to.be.false;
+        });
+        it('should return false if the signature doesn\'t pertain to the dataHex & address', async () => {
+            const wrongSignature = Object.assign({}, signature, {v: 28});
+            const isValid = await zeroEx.exchange.isValidSignatureAsync(dataHex, wrongSignature, address);
+            expect(isValid).to.be.false;
+        });
+        it('should return true if the signature does pertain to the dataHex & address', async () => {
+            const isValid = await zeroEx.exchange.isValidSignatureAsync(dataHex, signature, address);
+            expect(isValid).to.be.true;
+        });
+    });
+});