test(node): add test case for node.createTransaction

Author: Ian Tan

jest-setup.js

@@ -7,5 +7,5 @@
 // another public or private blockchain network. This source code is provided ‘as is’ and no
 // warranties are given as to title or non-infringement, merchantability or fitness for purpose
 // and, to the extent permitted by law, all liability for your use of the code is disclaimed.
-const crypto = require('@trust/webcrypto');
-window.crypto = crypto;
+window.crypto = require('@trust/webcrypto');
+window.fetch = require('jest-fetch-mock');

src/__tests__/node.spec.ts

@@ -0,0 +1,45 @@
+import elliptic from 'elliptic';
+import BN from 'bn.js';
+import {pairs} from './keypairs.fixtures';
+import Znode from '../node';
+import jestFetch from 'jest-fetch-mock';
+
+const secp256k1 = elliptic.ec('secp256k1');
+const node = new Znode({url: 'http://localhost:4201'});
+const fetchMock = fetch as typeof jestFetch;
+
+describe('node', () => {
+  beforeEach(() => {
+    fetchMock.resetMocks();
+  });
+
+  it('should be able to broadcast a well-formed transaction', (done) => {
+    const privateKey = pairs[1].private;
+    const publicKey = secp256k1
+      .keyFromPrivate(privateKey, 'hex')
+      .getPublic(true, 'hex');
+
+    const tx = {
+      version: 8,
+      nonce: 8,
+      to: pairs[0].digest.slice(0, 40),
+      from: pairs[1].digest.slice(0, 40),
+      pubKey: publicKey,
+      amount: new BN('888', 10),
+      gasPrice: 8,
+      gasLimit: 88,
+      code: '',
+      data: '',
+    };
+
+    // setup mock response here
+    const response = JSON.stringify({some: 'random_data'});
+    fetchMock.mockResponseOnce(response);
+
+    node.createTransaction(tx, (err, res) => {
+      expect(err).toBeFalsy();
+      expect(JSON.stringify(res)).toEqual(response);
+      done();
+    });
+  });
+});

src/node.ts

@@ -7,7 +7,7 @@
 // another public or private blockchain network. This source code is provided ‘as is’ and no
 // warranties are given as to title or non-infringement, merchantability or fitness for purpose
 // and, to the extent permitted by law, all liability for your use of the code is disclaimed.
-import fetch from 'cross-fetch';
+import BN from 'bn.js';
 import { validateArgs } from './util';
 import * as util from './util';
 
@@ -61,7 +61,7 @@ export default class ZNode {
       validateArgs(args, {
         to: [util.isAddress],
         pubKey: [util.isPubkey],
-        amount: [util.isNumber],
+        amount: [BN.isBN],
         gasPrice: [util.isNumber],
         gasLimit: [util.isNumber],
       });