Organize test files following contracts folders structure

test/payment/PullPayment.test.js

@@ -0,0 +1,71 @@
+var PullPaymentMock = artifacts.require('mocks/PullPaymentMock.sol');
+
+contract('PullPayment', function (accounts) {
+  let ppce;
+  let amount = 17 * 1e18;
+
+  beforeEach(async function () {
+    ppce = await PullPaymentMock.new({ value: amount });
+  });
+
+  it('can\'t call asyncSend externally', async function () {
+    assert.isUndefined(ppce.asyncSend);
+  });
+
+  it('can record an async payment correctly', async function () {
+    let AMOUNT = 100;
+    await ppce.callSend(accounts[0], AMOUNT);
+    let paymentsToAccount0 = await ppce.payments(accounts[0]);
+    let totalPayments = await ppce.totalPayments();
+
+    assert.equal(totalPayments, AMOUNT);
+    assert.equal(paymentsToAccount0, AMOUNT);
+  });
+
+  it('can add multiple balances on one account', async function () {
+    await ppce.callSend(accounts[0], 200);
+    await ppce.callSend(accounts[0], 300);
+    let paymentsToAccount0 = await ppce.payments(accounts[0]);
+    let totalPayments = await ppce.totalPayments();
+
+    assert.equal(totalPayments, 500);
+    assert.equal(paymentsToAccount0, 500);
+  });
+
+  it('can add balances on multiple accounts', async function () {
+    await ppce.callSend(accounts[0], 200);
+    await ppce.callSend(accounts[1], 300);
+
+    let paymentsToAccount0 = await ppce.payments(accounts[0]);
+    assert.equal(paymentsToAccount0, 200);
+
+    let paymentsToAccount1 = await ppce.payments(accounts[1]);
+    assert.equal(paymentsToAccount1, 300);
+
+    let totalPayments = await ppce.totalPayments();
+    assert.equal(totalPayments, 500);
+  });
+
+  it('can withdraw payment', async function () {
+    let payee = accounts[1];
+    let initialBalance = web3.eth.getBalance(payee);
+
+    await ppce.callSend(payee, amount);
+
+    let payment1 = await ppce.payments(payee);
+    assert.equal(payment1, amount);
+
+    let totalPayments = await ppce.totalPayments();
+    assert.equal(totalPayments, amount);
+
+    await ppce.withdrawPayments({ from: payee });
+    let payment2 = await ppce.payments(payee);
+    assert.equal(payment2, 0);
+
+    totalPayments = await ppce.totalPayments();
+    assert.equal(totalPayments, 0);
+
+    let balance = web3.eth.getBalance(payee);
+    assert(Math.abs(balance - initialBalance - amount) < 1e16);
+  });
+});