Adding unit tests for Solidity Crypto Units and Time Units

contracts/solidity/units/cryptoUnits.sol

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.20;
+
+contract CryptoUnits {
+    constructor() {
+    }
+
+    function get1Wei() public pure returns (uint) {
+      return 1 wei;
+    }
+
+    function get1GWei() public pure returns (uint256) {
+      return 1 gwei;
+    }
+
+    function get1Eth() public pure returns (uint256) {
+      return 1 ether;
+    }
+}

contracts/solidity/units/timeUnits.sol

@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.20;
+
+contract TimeUnits {
+    constructor() {
+    }
+
+    function get1Second() public pure returns (uint) {
+      return 1 seconds;
+    }
+
+    function get1Minute() public pure returns (uint) {
+      return 1 minutes;
+    }
+
+    function get1Hour() public pure returns (uint) {
+      return 1 hours;
+    }
+
+    function get1Day() public pure returns (uint) {
+      return 1 days;
+    }
+
+    function get1Week() public pure returns (uint) {
+      return 1 weeks;
+    }
+}

test/constants.js

@@ -109,6 +109,12 @@ const GAS_LIMIT_8000000 = { gasLimit: 8000000 }
 const TOKEN_NAME = 'tokenName'
 const TOKEN_SYMBOL = 'tokenSymbol'
 const TX_SUCCESS_CODE = 22
+const SECOND = WEI = 1
+const MINUTE = 60 * SECOND
+const HOUR = 60 * MINUTE
+const DAY = 24 * HOUR
+const WEEK = 7 * DAY
+const GWEI = 1e9
 
 module.exports = {
   Events,
@@ -122,4 +128,11 @@ module.exports = {
   TOKEN_NAME,
   TOKEN_SYMBOL,
   TX_SUCCESS_CODE,
+  SECOND,
+  MINUTE,
+  HOUR,
+  DAY,
+  WEEK,
+  WEI,
+  GWEI
 }

test/solidity/units/cryptoUnits.js

@@ -0,0 +1,34 @@
+const { expect } = require('chai')
+const { ethers } = require('hardhat')
+const { WEI, GWEI } = require('../../constants')
+
+describe('Crypto Units tests', function () {
+  let signers
+  let contract
+
+  before(async function () {
+    signers = await ethers.getSigners()
+
+    const factory = await ethers.getContractFactory('CryptoUnits')
+    contract = await factory.deploy()
+  })
+
+  it('confirm 1 wei == 1', async function () {
+    const res = await contract.get1Wei()
+
+    expect(res).to.equal(WEI)
+  })
+
+  it('confirm 1 gwei == 1e9', async function () {
+    const res = await contract.get1GWei()
+
+    expect(res).to.equal(GWEI)
+  })
+
+  it('confirm 1 ether == 1e18', async function () {
+    const res = await contract.get1Eth()
+
+    expect(res / 1e9).to.equal(GWEI)
+  })
+
+})

test/solidity/units/timeUnits.js

@@ -0,0 +1,46 @@
+const { expect } = require('chai')
+const { ethers } = require('hardhat')
+const { SECOND, MINUTE, HOUR, DAY, WEEK } = require('../../constants')
+
+describe('Time Units tests', function () {
+  let signers
+  let contract
+
+  before(async function () {
+    signers = await ethers.getSigners()
+
+    const factory = await ethers.getContractFactory('TimeUnits')
+    contract = await factory.deploy()
+  })
+
+  it('confirm 1 == 1 seconds', async function () {
+    const res = await contract.get1Second()
+
+    expect(res).to.equal(SECOND)
+  })
+
+  it('confirm 1 minutes == 60 seconds', async function () {
+    const res = await contract.get1Minute()
+
+    expect(res).to.equal(MINUTE)
+  })
+
+  it('confirm 1 hours == 60 minutes', async function () {
+    const res = await contract.get1Hour()
+
+    expect(res).to.equal(HOUR)
+  })
+
+  it('confirm 1 days == 24 hours', async function () {
+    const res = await contract.get1Day()
+
+    expect(res).to.equal(DAY)
+  })
+
+  it('confirm 1 weeks == 7 days', async function () {
+    const res = await contract.get1Week()
+
+    expect(res).to.equal(WEEK)
+  })
+
+})