feat: add LiteSVM tests for page visit tracking in Anchor program

* Implement tests for creating and incrementing page visit counts using LiteSVM.
* Update existing test structure to include assertions for page visit tracking.
* Refactor test descriptions for clarity.

Author: sol-warrior

basics/program-derived-addresses/anchor/tests/litesvm.test.ts

@@ -0,0 +1,119 @@
+import anchor from "@coral-xyz/anchor";
+import {
+	Keypair,
+	PublicKey,
+	SystemProgram,
+	Transaction,
+	TransactionInstruction,
+} from "@solana/web3.js";
+import { assert } from "chai";
+import { LiteSVM } from "litesvm";
+import IDL from "../target/idl/program_derived_addresses_program.json" with {
+	type: "json",
+};
+
+describe("LiteSVM: PDA", () => {
+	const svm = new LiteSVM();
+	const programId = new PublicKey(IDL.address);
+	const coder = new anchor.BorshCoder(IDL as anchor.Idl);
+
+	const payer = Keypair.generate();
+	svm.airdrop(payer.publicKey, BigInt(1000000000));
+
+	const programPath = new URL(
+		"../target/deploy/program_derived_addresses_program.so",
+		import.meta.url,
+	).pathname;
+	svm.addProgramFromFile(programId, programPath);
+
+	// PDA for the page visits account
+	const [pageVisitPDA] = PublicKey.findProgramAddressSync(
+		[Buffer.from("page_visits"), payer.publicKey.toBuffer()],
+		programId,
+	);
+
+	it("Create the page visits tracking PDA", () => {
+		const data = coder.instruction.encode("create_page_visits", {});
+		const ix = new TransactionInstruction({
+			keys: [
+				{ pubkey: payer.publicKey, isSigner: true, isWritable: true },
+				{ pubkey: pageVisitPDA, isSigner: false, isWritable: true },
+				{ pubkey: SystemProgram.programId, isSigner: false, isWritable: false },
+			],
+			programId,
+			data,
+		});
+
+		const tx = new Transaction().add(ix);
+		tx.feePayer = payer.publicKey;
+		tx.recentBlockhash = svm.latestBlockhash();
+		tx.sign(payer);
+		svm.sendTransaction(tx);
+
+		//Fetch the pageVisitPDA account and check it page visit count
+		const pageVisitPDAAccInfo = svm.getAccount(pageVisitPDA);
+		const pageVisitAccount = coder.accounts.decode(
+			"PageVisits",
+			Buffer.from(pageVisitPDAAccInfo.data),
+		);
+
+		assert.equal(pageVisitAccount.page_visits, 0);
+	});
+
+	it("Visit the page!", () => {
+		const data = coder.instruction.encode("increment_page_visits", {});
+		const ix = new TransactionInstruction({
+			keys: [
+				{ pubkey: payer.publicKey, isSigner: true, isWritable: true },
+				{ pubkey: pageVisitPDA, isSigner: false, isWritable: true },
+				{ pubkey: SystemProgram.programId, isSigner: false, isWritable: false },
+			],
+			programId,
+			data,
+		});
+
+		const tx = new Transaction().add(ix);
+		tx.feePayer = payer.publicKey;
+		tx.recentBlockhash = svm.latestBlockhash();
+		tx.sign(payer);
+		svm.sendTransaction(tx);
+		svm.expireBlockhash();
+
+		//Fetch the pageVisitPDA account and check it page visit count
+		const pageVisitPDAAccInfo = svm.getAccount(pageVisitPDA);
+		const pageVisitAccount = coder.accounts.decode(
+			"PageVisits",
+			Buffer.from(pageVisitPDAAccInfo.data),
+		);
+
+		assert.equal(pageVisitAccount.page_visits, 1);
+	});
+
+	it("Again visit the page!", () => {
+		const data = coder.instruction.encode("increment_page_visits", {});
+		const ix = new TransactionInstruction({
+			keys: [
+				{ pubkey: payer.publicKey, isSigner: true, isWritable: true },
+				{ pubkey: pageVisitPDA, isSigner: false, isWritable: true },
+				{ pubkey: SystemProgram.programId, isSigner: false, isWritable: false },
+			],
+			programId,
+			data,
+		});
+
+		const tx = new Transaction().add(ix);
+		tx.feePayer = payer.publicKey;
+		tx.recentBlockhash = svm.latestBlockhash();
+		tx.sign(payer);
+		svm.sendTransaction(tx);
+
+		//Fetch the pageVisitPDA account and check it page visit count
+		const pageVisitPDAAccInfo = svm.getAccount(pageVisitPDA);
+		const pageVisitAccount = coder.accounts.decode(
+			"PageVisits",
+			Buffer.from(pageVisitPDAAccInfo.data),
+		);
+
+		assert.equal(pageVisitAccount.page_visits, 2);
+	});
+});

basics/program-derived-addresses/anchor/tests/test.ts

@@ -1,8 +1,9 @@
 import * as anchor from "@coral-xyz/anchor";
 import { PublicKey } from "@solana/web3.js";
-import type { ProgramDerivedAddressesProgram } from "../target/types/program_derived_addresses_program";
+import { assert } from "chai";
+import type { ProgramDerivedAddressesProgram } from "../target/types/program_derived_addresses_program.ts";
 
-describe("PDAs", () => {
+describe("Anchor: PDAs", () => {
 	const provider = anchor.AnchorProvider.env();
 	anchor.setProvider(provider);
 	const payer = provider.wallet as anchor.Wallet;
@@ -22,6 +23,9 @@ describe("PDAs", () => {
 				payer: payer.publicKey,
 			})
 			.rpc();
+
+		const pageVisits = await program.account.pageVisits.fetch(pageVisitPDA);
+		assert.equal(pageVisits.pageVisits, 0);
 	});
 
 	it("Visit the page!", async () => {
@@ -31,19 +35,20 @@ describe("PDAs", () => {
 				user: payer.publicKey,
 			})
 			.rpc();
+
+		const pageVisits = await program.account.pageVisits.fetch(pageVisitPDA);
+		assert.equal(pageVisits.pageVisits, 1);
 	});
 
-	it("Visit the page!", async () => {
+	it("Again visit the page!", async () => {
 		await program.methods
 			.incrementPageVisits()
 			.accounts({
 				user: payer.publicKey,
 			})
 			.rpc();
-	});
 
-	it("View page visits", async () => {
 		const pageVisits = await program.account.pageVisits.fetch(pageVisitPDA);
-		console.log(`Number of page visits: ${pageVisits.pageVisits}`);
+		assert.equal(pageVisits.pageVisits, 2);
 	});
 });