Merge pull request #14 from 0xProject/implementFirstExchangeMethod

Implement first exchange method

1 files changed, 160 insertions, 0 deletions

diff --git a/test/0x.js_test.ts b/test/0x.js_test.ts
new file mode 100644
index 000000000..d5b2015fb
--- /dev/null
+++ b/test/0x.js_test.ts
@@ -0,0 +1,160 @@
+import {ZeroEx} from '../src/ts/0x.js';
+import * as chai from 'chai';
+import 'mocha';
+import * as BigNumber from 'bignumber.js';
+import ChaiBigNumber = require('chai-bignumber');
+import {constants} from '../src/ts/utils/constants';
+
+// Use BigNumber chai add-on
+chai.use(ChaiBigNumber());
+const expect = chai.expect;
+
+describe('ZeroEx library', () => {
+    describe('#getOrderHash', () => {
+        const ORDER_HASH = '0x103a5e97dab5dbeb8f385636f86a7d1e458a7ccbe1bd194727f0b2f85ab116c7';
+        it('defaults takerAddress to NULL address', () => {
+            const orderHash = ZeroEx.getOrderHashHex(
+                constants.NULL_ADDRESS,
+                constants.NULL_ADDRESS,
+                '',
+                constants.NULL_ADDRESS,
+                constants.NULL_ADDRESS,
+                constants.NULL_ADDRESS,
+                new BigNumber(0),
+                new BigNumber(0),
+                new BigNumber(0),
+                new BigNumber(0),
+                new BigNumber(0),
+                new BigNumber(0),
+            );
+            expect(orderHash).to.be.equal(ORDER_HASH);
+        });
+        it('calculates the order hash', () => {
+            const orderHash = ZeroEx.getOrderHashHex(
+                constants.NULL_ADDRESS,
+                constants.NULL_ADDRESS,
+                constants.NULL_ADDRESS,
+                constants.NULL_ADDRESS,
+                constants.NULL_ADDRESS,
+                constants.NULL_ADDRESS,
+                new BigNumber(0),
+                new BigNumber(0),
+                new BigNumber(0),
+                new BigNumber(0),
+                new BigNumber(0),
+                new BigNumber(0),
+            );
+            expect(orderHash).to.be.equal(ORDER_HASH);
+        });
+    });
+    describe('#isValidSignature', () => {
+        // This test data was borrowed from the JSON RPC documentation
+        // Source: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign
+        const data = '0xdeadbeaf';
+        const signature = {
+            v: 27,
+            r: '0xa3f20717a250c2b0b729b7e5becbff67fdaef7e0699da4de7ca5895b02a170a1',
+            s: '0x2d887fd3b17bfdce3481f10bea41f45ba9f709d39ce8325427b57afcfc994cee',
+        };
+        const address = '0x9b2055d370f73ec7d8a03e965129118dc8f5bf83';
+        describe('should throw if passed a malformed signature', () => {
+            it('malformed v', () => {
+                const malformedSignature = {
+                    v: 34,
+                    r: signature.r,
+                    s: signature.s,
+                };
+                expect(() => ZeroEx.isValidSignature(data, malformedSignature, address)).to.throw();
+            });
+            it('r lacks 0x prefix', () => {
+                const malformedR = signature.r.replace('0x', '');
+                const malformedSignature = {
+                    v: signature.v,
+                    r: malformedR,
+                    s: signature.s,
+                };
+                expect(() => ZeroEx.isValidSignature(data, malformedSignature, address)).to.throw();
+            });
+            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.isValidSignature(data, malformedSignature, address)).to.throw();
+            });
+            it('s is not hex', () => {
+                const malformedS = signature.s.replace('0', 'z');
+                const malformedSignature = {
+                    v: signature.v,
+                    r: signature.r,
+                    s: malformedS,
+                };
+                expect(() => ZeroEx.isValidSignature(data, malformedSignature, address)).to.throw();
+            });
+        });
+        it('should return false if the data doesn\'t pertain to the signature & address', () => {
+            const isValid = ZeroEx.isValidSignature('0x0', signature, address);
+            expect(isValid).to.be.false;
+        });
+        it('should return false if the address doesn\'t pertain to the signature & data', () => {
+            const validUnrelatedAddress = '0x8b0292B11a196601eD2ce54B665CaFEca0347D42';
+            const isValid = ZeroEx.isValidSignature(data, signature, validUnrelatedAddress);
+            expect(isValid).to.be.false;
+        });
+        it('should return false if the signature doesn\'t pertain to the data & address', () => {
+            const wrongSignature = Object.assign({}, signature, {v: 28});
+            const isValid = ZeroEx.isValidSignature(data, wrongSignature, address);
+            expect(isValid).to.be.false;
+        });
+        it('should return true if the signature does pertain to the data & address', () => {
+            const isValid = ZeroEx.isValidSignature(data, signature, address);
+            expect(isValid).to.be.true;
+        });
+    });
+    describe('#generateSalt', () => {
+        it('generates different salts', () => {
+            const equal = ZeroEx.generatePseudoRandomSalt().eq(ZeroEx.generatePseudoRandomSalt());
+            expect(equal).to.be.false;
+        });
+        it('generates salt in range [0..2^256)', () => {
+            const salt = ZeroEx.generatePseudoRandomSalt();
+            expect(salt.greaterThanOrEqualTo(0)).to.be.true;
+            const twoPow256 = new BigNumber(2).pow(256);
+            expect(salt.lessThan(twoPow256)).to.be.true;
+        });
+    });
+    describe('#isValidOrderHash', () => {
+        it('returns false if the value is not a hex string', () => {
+            const isValid = ZeroEx.isValidOrderHash('not a hex');
+            expect(isValid).to.be.false;
+        });
+        it('returns false if the length is wrong', () => {
+            const isValid = ZeroEx.isValidOrderHash('0xdeadbeef');
+            expect(isValid).to.be.false;
+        });
+        it('returns true if order hash is correct', () => {
+            const isValid = ZeroEx.isValidOrderHash('0x' + Array(65).join('0'));
+            expect(isValid).to.be.true;
+        });
+    });
+    describe('#toUnitAmount', () => {
+        it('Should return the expected unit amount for the decimals passed in', () => {
+            const baseUnitAmount = new BigNumber(1000000000);
+            const decimals = 6;
+            const unitAmount = ZeroEx.toUnitAmount(baseUnitAmount, decimals);
+            const expectedUnitAmount = new BigNumber(1000);
+            expect(unitAmount).to.be.bignumber.equal(expectedUnitAmount);
+        });
+    });
+    describe('#toBaseUnitAmount', () => {
+        it('Should return the expected base unit amount for the decimals passed in', () => {
+            const unitAmount = new BigNumber(1000);
+            const decimals = 6;
+            const baseUnitAmount = ZeroEx.toBaseUnitAmount(unitAmount, decimals);
+            const expectedUnitAmount = new BigNumber(1000000000);
+            expect(baseUnitAmount).to.be.bignumber.equal(expectedUnitAmount);
+        });
+    });
+});