Migrate from truffle to test-environment (#2007)

* Sketch

* Migrate all tests to test-env

* Finish migration to test-env

* Add config

* Work on GSN tests

* Migrate to newer test-env version and loader syntax

* Add GSN setup

* Finish test-env migration

* Setup coverage using test-env

* Migrate to npm package

* Fix package.json

* Add compile step to CI

* Add comment on coverage setup

* Remove dependency on @truffle/contract

* Fix package-lock merge

* Fix linter errors

* Upgrade test-environment, depend locally on ganche-coverage

* Improve coverage script

* Improve sign.js API

* Move accounts destructuring to describe block

* Switch to prebuilt ethereumjs-vm package

* Upgrade test-enviroment version

* use workspace in circleci config

* remove unnecessary npx

test/payment/PaymentSplitter.test.js

@@ -1,11 +1,15 @@
+const { accounts, contract } = require('@openzeppelin/test-environment');
+
 const { balance, constants, ether, expectEvent, send, expectRevert } = require('@openzeppelin/test-helpers');
 const { ZERO_ADDRESS } = constants;
 
 const { expect } = require('chai');
 
-const PaymentSplitter = artifacts.require('PaymentSplitter');
+const PaymentSplitter = contract.fromArtifact('PaymentSplitter');
+
+describe('PaymentSplitter', function () {
+  const [ owner, payee1, payee2, payee3, nonpayee1, payer1 ] = accounts;
 
-contract('PaymentSplitter', function ([_, owner, payee1, payee2, payee3, nonpayee1, payer1]) {
   const amount = ether('1');
 
   it('rejects an empty set of payees', async function () {

test/payment/PullPayment.test.js

@@ -1,10 +1,14 @@
+const { accounts, contract } = require('@openzeppelin/test-environment');
+
 const { balance, ether } = require('@openzeppelin/test-helpers');
 
 const { expect } = require('chai');
 
-const PullPaymentMock = artifacts.require('PullPaymentMock');
+const PullPaymentMock = contract.fromArtifact('PullPaymentMock');
+
+describe('PullPayment', function () {
+  const [ payer, payee1, payee2 ] = accounts;
 
-contract('PullPayment', function ([_, payer, payee1, payee2]) {
   const amount = ether('17');
 
   beforeEach(async function () {
@@ -35,23 +39,23 @@ contract('PullPayment', function ([_, payer, payee1, payee2]) {
     const balanceTracker = await balance.tracker(payee1);
 
     await this.contract.callTransfer(payee1, amount, { from: payer });
-    (await this.contract.payments(payee1)).should.be.bignumber.equal(amount);
+    expect(await this.contract.payments(payee1)).to.be.bignumber.equal(amount);
 
     await this.contract.withdrawPayments(payee1);
 
-    (await balanceTracker.delta()).should.be.bignumber.equal(amount);
-    (await this.contract.payments(payee1)).should.be.bignumber.equal('0');
+    expect(await balanceTracker.delta()).to.be.bignumber.equal(amount);
+    expect(await this.contract.payments(payee1)).to.be.bignumber.equal('0');
   });
 
   it('can withdraw payment forwarding all gas', async function () {
     const balanceTracker = await balance.tracker(payee1);
 
     await this.contract.callTransfer(payee1, amount, { from: payer });
-    (await this.contract.payments(payee1)).should.be.bignumber.equal(amount);
+    expect(await this.contract.payments(payee1)).to.be.bignumber.equal(amount);
 
     await this.contract.withdrawPaymentsWithGas(payee1);
 
-    (await balanceTracker.delta()).should.be.bignumber.equal(amount);
-    (await this.contract.payments(payee1)).should.be.bignumber.equal('0');
+    expect(await balanceTracker.delta()).to.be.bignumber.equal(amount);
+    expect(await this.contract.payments(payee1)).to.be.bignumber.equal('0');
   });
 });

test/payment/escrow/ConditionalEscrow.test.js

@@ -1,9 +1,13 @@
+const { accounts, contract } = require('@openzeppelin/test-environment');
+
 const { ether, expectRevert } = require('@openzeppelin/test-helpers');
 const { shouldBehaveLikeEscrow } = require('./Escrow.behavior');
 
-const ConditionalEscrowMock = artifacts.require('ConditionalEscrowMock');
+const ConditionalEscrowMock = contract.fromArtifact('ConditionalEscrowMock');
+
+describe('ConditionalEscrow', function () {
+  const [ owner, payee, ...otherAccounts ] = accounts;
 
-contract('ConditionalEscrow', function ([_, owner, payee, ...otherAccounts]) {
   beforeEach(async function () {
     this.escrow = await ConditionalEscrowMock.new({ from: owner });
   });

test/payment/escrow/Escrow.test.js

@@ -1,9 +1,13 @@
+const { accounts, contract } = require('@openzeppelin/test-environment');
+
 require('@openzeppelin/test-helpers');
 const { shouldBehaveLikeEscrow } = require('./Escrow.behavior');
 
-const Escrow = artifacts.require('Escrow');
+const Escrow = contract.fromArtifact('Escrow');
+
+describe('Escrow', function () {
+  const [ primary, ...otherAccounts ] = accounts;
 
-contract('Escrow', function ([_, primary, ...otherAccounts]) {
   beforeEach(async function () {
     this.escrow = await Escrow.new({ from: primary });
   });

test/payment/escrow/RefundEscrow.test.js

@@ -1,11 +1,15 @@
+const { accounts, contract } = require('@openzeppelin/test-environment');
+
 const { balance, constants, ether, expectEvent, expectRevert } = require('@openzeppelin/test-helpers');
 const { ZERO_ADDRESS } = constants;
 
 const { expect } = require('chai');
 
-const RefundEscrow = artifacts.require('RefundEscrow');
+const RefundEscrow = contract.fromArtifact('RefundEscrow');
+
+describe('RefundEscrow', function () {
+  const [ primary, beneficiary, refundee1, refundee2 ] = accounts;
 
-contract('RefundEscrow', function ([_, primary, beneficiary, refundee1, refundee2]) {
   const amount = ether('54');
   const refundees = [refundee1, refundee2];