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/utils/Address.test.js

@@ -1,11 +1,15 @@
+const { accounts, contract } = require('@openzeppelin/test-environment');
+
 const { balance, constants, ether, expectRevert, send } = require('@openzeppelin/test-helpers');
 const { expect } = require('chai');
 
-const AddressImpl = artifacts.require('AddressImpl');
-const SimpleToken = artifacts.require('SimpleToken');
-const EtherReceiver = artifacts.require('EtherReceiverMock');
+const AddressImpl = contract.fromArtifact('AddressImpl');
+const SimpleToken = contract.fromArtifact('SimpleToken');
+const EtherReceiver = contract.fromArtifact('EtherReceiverMock');
+
+describe('Address', function () {
+  const [ recipient, other ] = accounts;
 
-contract('Address', function ([_, recipient, other]) {
   const ALL_ONES_ADDRESS = '0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF';
 
   beforeEach(async function () {

test/utils/Arrays.test.js

@@ -1,10 +1,11 @@
+const { contract } = require('@openzeppelin/test-environment');
 require('@openzeppelin/test-helpers');
 
 const { expect } = require('chai');
 
-const ArraysImpl = artifacts.require('ArraysImpl');
+const ArraysImpl = contract.fromArtifact('ArraysImpl');
 
-contract('Arrays', function () {
+describe('Arrays', function () {
   context('Even number of elements', function () {
     const EVEN_ELEMENTS_ARRAY = [11, 12, 13, 14, 15, 16, 17, 18, 19, 20];
 

test/utils/ReentrancyGuard.test.js

@@ -1,11 +1,12 @@
+const { contract } = require('@openzeppelin/test-environment');
 const { expectRevert } = require('@openzeppelin/test-helpers');
 
 const { expect } = require('chai');
 
-const ReentrancyMock = artifacts.require('ReentrancyMock');
-const ReentrancyAttack = artifacts.require('ReentrancyAttack');
+const ReentrancyMock = contract.fromArtifact('ReentrancyMock');
+const ReentrancyAttack = contract.fromArtifact('ReentrancyAttack');
 
-contract('ReentrancyGuard', function () {
+describe('ReentrancyGuard', function () {
   beforeEach(async function () {
     this.reentrancyMock = await ReentrancyMock.new();
     expect(await this.reentrancyMock.counter()).to.be.bignumber.equal('0');

test/utils/SafeCast.test.js

@@ -1,10 +1,11 @@
+const { contract } = require('@openzeppelin/test-environment');
 const { BN, expectRevert } = require('@openzeppelin/test-helpers');
 
 const { expect } = require('chai');
 
-const SafeCastMock = artifacts.require('SafeCastMock');
+const SafeCastMock = contract.fromArtifact('SafeCastMock');
 
-contract('SafeCast', async () => {
+describe('SafeCast', async () => {
   beforeEach(async function () {
     this.safeCast = await SafeCastMock.new();
   });