application manager

contracts/ApplicationManager.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.24;
+
+import {IApplicationManager} from "./IApplicationManager.sol";
+
+contract ApplicationManager is IApplicationManager {
+    mapping(uint => Application) private applications_;
+    uint private nextApplicationId_;
+
+    constructor() {}
+
+    function nextApplicationId() external view returns (uint) {
+        return nextApplicationId_;
+    }
+
+    function createApplication(Application memory _application) external {
+        applications_[nextApplicationId_] = _application;
+        emit ApplicationCreated(
+            nextApplicationId_,
+            applications_[nextApplicationId_]
+        );
+        nextApplicationId_++;
+    }
+
+    function updateApplication(
+        uint _id,
+        Application memory _application
+    ) external override {}
+
+    function deleteApplication(uint _id) external override {}
+
+    function getApplication(
+        uint _id
+    ) external view returns (Application memory) {
+        return applications_[_id];
+    }
+
+    function getApplications(
+        uint _start,
+        uint _limit
+    ) external override returns (Application[] memory application) {}
+}

contracts/IApplicationManager.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.24;
+
+interface IApplicationManager {
+    struct Application {
+        string name;
+        address account;
+    }
+
+    event ApplicationCreated(uint id, Application application);
+    event ApplicationUpdated(uint id, Application application);
+    event ApplicationDeleted(uint id, Application application);
+
+    function nextApplicationId() external view returns (uint);
+
+    function createApplication(Application memory _application) external;
+
+    function updateApplication(
+        uint _id,
+        Application memory _application
+    ) external;
+
+    function deleteApplication(uint _id) external;
+
+    function getApplication(
+        uint _id
+    ) external view returns (Application memory);
+
+    function getApplications(
+        uint _start,
+        uint _limit
+    ) external returns (Application[] memory application);
+}

test/ApplicationManager.ts

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+import { loadFixture } from "@nomicfoundation/hardhat-toolbox-viem/network-helpers";
+import { expect } from "chai";
+import hre from "hardhat";
+import { type Address, getAddress, parseUnits } from "viem";
+
+interface Application {
+	name: string;
+	account: Address;
+}
+
+describe("ApplicationManager", () => {
+	// We define a fixture to reuse the same setup in every test.
+	// We use loadFixture to run this setup once, snapshot that state,
+	// and reset Hardhat Network to that snapshot in every test.
+	async function deploy() {
+		// Contracts are deployed using the first signer/account by default
+		const [owner, otherAccount, app1Account] =
+			await hre.viem.getWalletClients();
+
+		const contract = await hre.viem.deployContract("ApplicationManager");
+
+		const publicClient = await hre.viem.getPublicClient();
+
+		return {
+			contract,
+			owner,
+			otherAccount,
+			app1Account,
+			publicClient,
+		};
+	}
+
+	describe("Deployment", () => {
+		it("Should set the nextxApplicationId to 0", async () => {
+			const { contract } = await loadFixture(deploy);
+			expect(await contract.read.nextApplicationId()).to.equal(
+				parseUnits("0", 0),
+			);
+		});
+	});
+
+	describe("createApplication", () => {
+		// biome-ignore lint/suspicious/noExplicitAny: <explanation>
+		let contract: any;
+		let app: Application;
+
+		beforeEach(async () => {
+			const fixture = await loadFixture(deploy);
+			contract = fixture.contract;
+
+			app = {
+				name: "app",
+				account: getAddress(fixture.app1Account.account.address),
+			};
+		});
+
+		it("Should accept name (string) and account (address) as inputs", async () => {
+			expect(await contract.write.createApplication([app])).to.be.string;
+		});
+		it("Should increment nextApplicationId", async () => {
+			const t0 = await contract.read.nextApplicationId();
+			expect(t0).to.equal(parseUnits("0", 0));
+			await contract.write.createApplication([app]);
+			const t1 = await contract.read.nextApplicationId();
+			expect(t1).to.equal(parseUnits("1", 0));
+		});
+		it("Should create a new Application", async () => {
+			const applicationId = await contract.read.nextApplicationId();
+			await contract.write.createApplication([app]);
+			expect(await contract.read.getApplication([applicationId])).to.contain(
+				app,
+			);
+		});
+		it("Should emit the ApplicationCreated event with the new application's details", async () => {
+			const applicationId = await contract.read.nextApplicationId();
+			const txHash = await contract.write.createApplication([app]);
+
+			const events = await contract.getEvents.ApplicationCreated();
+
+			expect(events.length).to.be.equal(1);
+
+			const event = events[0];
+			expect(event.eventName).to.be.equal("ApplicationCreated");
+			expect(event.transactionHash).to.be.equal(txHash);
+			expect(event.args.id).to.be.equal(applicationId);
+			expect(event.args.application).to.contain(app);
+		});
+	});
+});