More Swap testing with hardhat (#3968)

* Played around with Hardhat

* Remove API key

* Clean up PR

* Add more timeout

* Move out code

* Revert hardhat config .ts to .js

* Remove commented code

* Add whitespace

__tests__/fixtures.js

@@ -49,7 +49,7 @@ const FIXTURE_SEND_ADDRESS = '0x4bbeEB066eD09B7AEd07bF39EEe0460DFa261520';
 
 const FIXTURE_SEND_AMOUNT = '0.001';
 
-const FIXTURE_WEB3_ADDRESS = '0xc6d5a3c98ec9073b54fa0969957bd582e8d874bf ';
+const FIXTURE_WEB3_ADDRESS = '0xc6d5a3c98ec9073b54fa0969957bd582e8d874bf';
 
 const FIXTURE_MYC_STORAGE_KEY = 'MYC_Storage';
 
@@ -163,6 +163,20 @@ const FIXTURE_HARDHAT = {
           uuid: '356a192b-7913-504c-9457-4d18c28d46e6',
           balance: '9998866308480000000000',
           mtime: 1621347441875
+        },
+        {
+          ticker: 'DAI',
+          name: 'DAI Stablecoin',
+          decimal: 18,
+          support: {},
+          social: {},
+          networkId: 'Ethereum',
+          type: 'erc20',
+          isCustom: false,
+          contractAddress: '0x6B175474E89094C44Da98b954EedeAC495271d0F',
+          uuid: 'e1f698bf-cb85-5405-b563-14774af14bf1',
+          balance: '9998866308480000000000',
+          mtime: 1621347441875
         }
       ],
       transactions: [],

__tests__/hardhat-utils.js

@@ -0,0 +1,52 @@
+import { Contract } from '@ethersproject/contracts';
+import { JsonRpcProvider } from '@ethersproject/providers';
+
+import { FIXTURE_WEB3_ADDRESS } from './fixtures';
+
+export const resetFork = async () => {
+  const provider = new JsonRpcProvider('http://127.0.0.1:8546/');
+
+  await provider.send('hardhat_reset', [
+    {
+      forking: {
+        jsonRpcUrl: `https://eth-mainnet.alchemyapi.io/v2/${process.env.ALCHEMY_API_KEY}`
+      }
+    }
+  ]);
+};
+
+// Transfers DAI to the test address
+export const setupDAI = async () => {
+  const provider = new JsonRpcProvider('http://127.0.0.1:8546/');
+
+  await provider.send('hardhat_impersonateAccount', ['0xf977814e90da44bfa03b6295a0616a897441acec']);
+
+  const signer = await provider.getSigner('0xf977814e90da44bfa03b6295a0616a897441acec');
+
+  const abi = [
+    // Read-Only Functions
+    'function balanceOf(address owner) view returns (uint256)',
+    'function decimals() view returns (uint8)',
+    'function symbol() view returns (string)',
+
+    // Authenticated Functions
+    'function transfer(address to, uint amount) returns (boolean)',
+
+    // Events
+    'event Transfer(address indexed from, address indexed to, uint amount)'
+  ];
+
+  // send ERC20
+  const erc20 = new Contract('0x6b175474e89094c44da98b954eedeac495271d0f', abi, signer);
+  const tx = await erc20.populateTransaction.transfer(
+    FIXTURE_WEB3_ADDRESS,
+    '100000000000000000000'
+  );
+  const sent = await signer.sendTransaction(tx);
+
+  await sent.wait();
+
+  await provider.send('hardhat_stopImpersonatingAccount', [
+    '0xf977814e90da44bfa03b6295a0616a897441acec'
+  ]);
+};

__tests__/swap-page.po.js

@@ -1,3 +1,4 @@
+import { getByTestId } from '@testing-library/testcafe';
 import { Selector, t } from 'testcafe';
 
 import BasePage from './base-page.po';
@@ -17,6 +18,12 @@ export default class SwapPage extends BasePage {
     await t.typeText(Selector('input[name="swap-from"]').parent(), FIXTURE_SEND_AMOUNT);
   }
 
+  async fillFormERC20() {
+    await t.click(getByTestId('asset-selector-option-ETH'));
+    await t.click(getByTestId('asset-selector-option-DAI'));
+    await t.typeText(Selector('input[name="swap-from"]').parent(), FIXTURE_SEND_AMOUNT);
+  }
+
   async setupMock() {
     await setupEthereumMock(FIXTURE_HARDHAT_PRIVATE_KEY, 1);
   }

__tests__/swap.test.js

@@ -1,7 +1,13 @@
-import { getByTestId, queryAllByTestId, queryByText } from '@testing-library/testcafe';
+import {
+  getByTestId,
+  queryAllByTestId,
+  queryAllByText,
+  queryByText
+} from '@testing-library/testcafe';
 
 import { injectLS } from './clientScripts';
 import { FIXTURE_HARDHAT, FIXTURES_CONST, PAGES } from './fixtures';
+import { resetFork, setupDAI } from './hardhat-utils';
 import SwapPage from './swap-page.po';
 import { findByTKey } from './translation-utils';
 
@@ -11,9 +17,10 @@ fixture('Swap')
   .clientScripts({ content: injectLS(FIXTURE_HARDHAT) })
   .page(PAGES.SWAP);
 
-test('can do a swap', async (t) => {
+test('can do an ETH swap', async (t) => {
   await swapPage.waitPageLoaded();
   await swapPage.setupMock();
+  await resetFork();
 
   await swapPage.fillForm();
   await t.wait(FIXTURES_CONST.TIMEOUT);
@@ -31,3 +38,38 @@ test('can do a swap', async (t) => {
     .expect(queryAllByTestId('SUCCESS').with({ timeout: FIXTURES_CONST.HARDHAT_TIMEOUT }).exists)
     .ok({ timeout: FIXTURES_CONST.HARDHAT_TIMEOUT });
 });
+
+test('can do an ERC20 swap', async (t) => {
+  await swapPage.waitPageLoaded();
+  await swapPage.setupMock();
+  await resetFork();
+  await setupDAI();
+
+  await swapPage.fillFormERC20();
+  await t.wait(FIXTURES_CONST.TIMEOUT);
+
+  const button = await getByTestId('confirm-swap');
+  await t.click(button);
+
+  const approve = await queryAllByText(findByTKey('APPROVE_SWAP'))
+    .with({
+      timeout: FIXTURES_CONST.HARDHAT_TIMEOUT
+    })
+    .nth(1);
+  await t.expect(approve.exists).ok({ timeout: FIXTURES_CONST.HARDHAT_TIMEOUT });
+  await t.click(approve);
+
+  await t.wait(FIXTURES_CONST.HARDHAT_TIMEOUT);
+
+  const send = await queryByText(findByTKey('CONFIRM_TRANSACTION')).with({
+    timeout: FIXTURES_CONST.HARDHAT_TIMEOUT
+  });
+  await t.expect(send.exists).ok({ timeout: FIXTURES_CONST.HARDHAT_TIMEOUT });
+  await t.click(send);
+
+  await t.wait(FIXTURES_CONST.HARDHAT_TIMEOUT);
+
+  await t
+    .expect(queryAllByTestId('SUCCESS').count)
+    .eql(2, { timeout: FIXTURES_CONST.HARDHAT_TIMEOUT });
+});

hardhat.config.ts

@@ -1,4 +1,5 @@
 import { HardhatUserConfig } from 'hardhat/config';
+import '@nomiclabs/hardhat-ethers';
 
 const config: HardhatUserConfig = {
   networks: {

package.json

@@ -17,6 +17,7 @@
     "@ethersproject/bignumber": "5.1.1",
     "@ethersproject/bytes": "5.1.0",
     "@ethersproject/constants": "5.1.0",
+    "@ethersproject/contracts": "5.1.1",
     "@ethersproject/providers": "5.1.2",
     "@ethersproject/transactions": "5.1.1",
     "@ethersproject/units": "5.1.0",

yarn.lock

@@ -1380,6 +1380,21 @@
     rustbn.js "~0.2.0"
     util.promisify "^1.0.1"
 
+"@ethersproject/abi@^5.1.0":
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/@ethersproject/abi/-/abi-5.1.2.tgz#a8e75cd0455e6dc9e4861c3d1c22bbe436c1d775"
+  integrity sha512-uMhoQVPX0UtfzTpekYQSEUcJGDgsJ25ifz+SV6PDETWaUFhcR8RNgb1QPTASP13inW8r6iy0/Xdq9D5hK2pNvA==
+  dependencies:
+    "@ethersproject/address" "^5.1.0"
+    "@ethersproject/bignumber" "^5.1.0"
+    "@ethersproject/bytes" "^5.1.0"
+    "@ethersproject/constants" "^5.1.0"
+    "@ethersproject/hash" "^5.1.0"
+    "@ethersproject/keccak256" "^5.1.0"
+    "@ethersproject/logger" "^5.1.0"
+    "@ethersproject/properties" "^5.1.0"
+    "@ethersproject/strings" "^5.1.0"
+
 "@ethersproject/[email protected]", "@ethersproject/abstract-provider@^5.1.0":
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/@ethersproject/abstract-provider/-/abstract-provider-5.1.0.tgz#1f24c56cda5524ef4ed3cfc562a01d6b6f8eeb0b"
@@ -1453,6 +1468,22 @@
   dependencies:
     "@ethersproject/bignumber" "^5.1.0"
 
+"@ethersproject/[email protected]":
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/@ethersproject/contracts/-/contracts-5.1.1.tgz#c66cb6d618fcbd73e20a6b808e8f768b2b781d0b"
+  integrity sha512-6WwktLJ0DFWU8pDkgH4IGttQHhQN4SnwKFu9h+QYVe48VGWtbDu4W8/q/7QA1u/HWlWMrKxqawPiZUJj0UMvOw==
+  dependencies:
+    "@ethersproject/abi" "^5.1.0"
+    "@ethersproject/abstract-provider" "^5.1.0"
+    "@ethersproject/abstract-signer" "^5.1.0"
+    "@ethersproject/address" "^5.1.0"
+    "@ethersproject/bignumber" "^5.1.0"
+    "@ethersproject/bytes" "^5.1.0"
+    "@ethersproject/constants" "^5.1.0"
+    "@ethersproject/logger" "^5.1.0"
+    "@ethersproject/properties" "^5.1.0"
+    "@ethersproject/transactions" "^5.1.0"
+
 "@ethersproject/hash@^5.1.0":
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/@ethersproject/hash/-/hash-5.1.0.tgz#40961d64837d57f580b7b055e0d74174876d891e"