index.ts

it("Should save and retrieve the savings data", async function () {
  // Get the signer
  const [sender] = await ethers.getSigners();

  // Amount to save
  const ethAmount = "0.001";
  const weiAmount = ethers.utils.parseEther(ethAmount);
  const transaction = {
    value: weiAmount,
  };

  // Withdraw timestamp
  const withdrawTime = Date.now() + 1000;

  // Save the amount
  await lockSave.save(withdrawTime, transaction);

  // Get savings
  const savings = await lockSave.getSavings();

  // Extract savings values
  const saving = savings.values().next().value;
  const [owner, value, timestamp, withdrawTimestamp] = saving;

  const currentSaving: Saving = {
    address: sender.address,
    value: weiAmount.toString(),
    timestamp: Date.now(),
    withdrawTimestamp: withdrawTime,
  };

  const expectedSaving: Saving = {
    address: owner,
    value: value.toString(),
    timestamp: timestamp.toNumber(),
    withdrawTimestamp: withdrawTimestamp.toNumber(),
  };

  // Assert saving values
  expect(currentSaving.address).to.equal(expectedSaving.address);
  expect(currentSaving.value).to.equal(currentSaving.value);
  expect(
    currentSaving.withdrawTimestamp - expectedSaving.timestamp
  ).to.be.greaterThan(0);
  expect(currentSaving.withdrawTimestamp).to.equal(
    expectedSaving.withdrawTimestamp.toString()
  );
});