Create test_ERC20Token.js

blockchain_integration/pi_network/tests/test_ERC20Token.js

@@ -0,0 +1,44 @@
+// tests/test_ERC20Token.js
+const { expect } = require("chai");
+const { ethers } = require("hardhat");
+
+describe("ERC20Token", function () {
+    let Token;
+    let token;
+    let owner;
+    let addr1;
+    let addr2;
+
+    beforeEach(async function () {
+        Token = await ethers.getContractFactory("ERC20Token");
+        [owner, addr1, addr2] = await ethers.getSigners();
+        token = await Token.deploy("Test Token", "TTK", 1000);
+        await token.deployed();
+    });
+
+    it("Should have the correct name and symbol", async function () {
+        expect(await token.name()).to.equal("Test Token");
+        expect(await token.symbol()).to.equal("TTK");
+    });
+
+    it("Should assign the total supply to the owner", async function () {
+        const ownerBalance = await token.balanceOf(owner.address);
+        expect(await token.totalSupply()).to.equal(ownerBalance);
+    });
+
+    it("Should transfer tokens between accounts", async function () {
+        await token.transfer(addr1.address, 100);
+        const addr1Balance = await token.balanceOf(addr1.address);
+        expect(addr1Balance).to.equal(100);
+
+        await token.connect(addr1).transfer(addr2.address, 50);
+        const addr2Balance = await token.balanceOf(addr2.address);
+        expect(addr2Balance).to.equal(50);
+    });
+
+    it("Should fail if sender doesn’t have enough tokens", async function () {
+        const initialOwnerBalance = await token.balanceOf(owner.address);
+        await expect(token.connect(addr1).transfer(owner.address, 1)).to.be.revertedWith("ERC20: transfer amount exceeds balance");
+        expect(await token.balanceOf(owner.address)).to.equal(initialOwnerBalance);
+    });
+});