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test/staging/FundMe.staging.test.js

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+//Last Step Before Going to Mainnet
+
+const { ethers, deployments, getNamedAccounts } = require("hardhat");
+const { expect, assert } = require("chai");
+const { developmentChains } = require("../../helper-hardhat-config");
+
+// Run on testnet
+developmentChains.includes(network.name)
+    ? describe.skip
+    : describe("FundMe", async function () {
+          let fundMe;
+          let deployer;
+          const sendValue = ethers.utils.parseEther("1");
+          // Assume already deployed
+          // Assume on testnet, no need mock
+          beforeEach(async function () {
+              deployer = (await getNamedAccounts()).deployer;
+              fundMe = await ethers.getContract("FundMe", deployer);
+          });
+
+          it("allows people to fund and withdraw", async function () {
+              const fundTxResponse = await fundMe.fund({ value: sendValue });
+              await fundTxResponse.wait(1);
+              const withdrawTxResponse = await fundMe.withdraw();
+              await withdrawTxResponse.wait(1);
+
+              const endingFundMeBalance = await fundMe.provider.getBalance(
+                  fundMe.address,
+              );
+              console.log(
+                  endingFundMeBalance.toString() +
+                      " should equal 0, running assert equal...",
+              );
+              assert.equal(endingFundMeBalance.toString(), "0");
+          });
+      });