Reorganize the repo structure (#2503)

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

test/utils/escrow/Escrow.behavior.js

@@ -0,0 +1,94 @@
+const { balance, ether, expectEvent, expectRevert } = require('@openzeppelin/test-helpers');
+
+const { expect } = require('chai');
+
+function shouldBehaveLikeEscrow (owner, [payee1, payee2]) {
+  const amount = ether('42');
+
+  describe('as an escrow', function () {
+    describe('deposits', function () {
+      it('can accept a single deposit', async function () {
+        await this.escrow.deposit(payee1, { from: owner, value: amount });
+
+        expect(await balance.current(this.escrow.address)).to.be.bignumber.equal(amount);
+
+        expect(await this.escrow.depositsOf(payee1)).to.be.bignumber.equal(amount);
+      });
+
+      it('can accept an empty deposit', async function () {
+        await this.escrow.deposit(payee1, { from: owner, value: 0 });
+      });
+
+      it('only the owner can deposit', async function () {
+        await expectRevert(this.escrow.deposit(payee1, { from: payee2 }),
+          'Ownable: caller is not the owner',
+        );
+      });
+
+      it('emits a deposited event', async function () {
+        const { logs } = await this.escrow.deposit(payee1, { from: owner, value: amount });
+        expectEvent.inLogs(logs, 'Deposited', {
+          payee: payee1,
+          weiAmount: amount,
+        });
+      });
+
+      it('can add multiple deposits on a single account', async function () {
+        await this.escrow.deposit(payee1, { from: owner, value: amount });
+        await this.escrow.deposit(payee1, { from: owner, value: amount.muln(2) });
+
+        expect(await balance.current(this.escrow.address)).to.be.bignumber.equal(amount.muln(3));
+
+        expect(await this.escrow.depositsOf(payee1)).to.be.bignumber.equal(amount.muln(3));
+      });
+
+      it('can track deposits to multiple accounts', async function () {
+        await this.escrow.deposit(payee1, { from: owner, value: amount });
+        await this.escrow.deposit(payee2, { from: owner, value: amount.muln(2) });
+
+        expect(await balance.current(this.escrow.address)).to.be.bignumber.equal(amount.muln(3));
+
+        expect(await this.escrow.depositsOf(payee1)).to.be.bignumber.equal(amount);
+
+        expect(await this.escrow.depositsOf(payee2)).to.be.bignumber.equal(amount.muln(2));
+      });
+    });
+
+    describe('withdrawals', async function () {
+      it('can withdraw payments', async function () {
+        const balanceTracker = await balance.tracker(payee1);
+
+        await this.escrow.deposit(payee1, { from: owner, value: amount });
+        await this.escrow.withdraw(payee1, { from: owner });
+
+        expect(await balanceTracker.delta()).to.be.bignumber.equal(amount);
+
+        expect(await balance.current(this.escrow.address)).to.be.bignumber.equal('0');
+        expect(await this.escrow.depositsOf(payee1)).to.be.bignumber.equal('0');
+      });
+
+      it('can do an empty withdrawal', async function () {
+        await this.escrow.withdraw(payee1, { from: owner });
+      });
+
+      it('only the owner can withdraw', async function () {
+        await expectRevert(this.escrow.withdraw(payee1, { from: payee1 }),
+          'Ownable: caller is not the owner',
+        );
+      });
+
+      it('emits a withdrawn event', async function () {
+        await this.escrow.deposit(payee1, { from: owner, value: amount });
+        const { logs } = await this.escrow.withdraw(payee1, { from: owner });
+        expectEvent.inLogs(logs, 'Withdrawn', {
+          payee: payee1,
+          weiAmount: amount,
+        });
+      });
+    });
+  });
+}
+
+module.exports = {
+  shouldBehaveLikeEscrow,
+};