feat: add LiteSVM test for rent anchor program

Author: sol-warrior

basics/rent/anchor/tests/litesvm.test.ts

@@ -0,0 +1,74 @@
+import anchor from "@coral-xyz/anchor";
+import {
+	Keypair,
+	LAMPORTS_PER_SOL,
+	PublicKey,
+	SystemProgram,
+	Transaction,
+	TransactionInstruction,
+} from "@solana/web3.js";
+import { assert } from "chai";
+import { LiteSVM } from "litesvm";
+import Idl from "../target/idl/rent_example.json" with { type: "json" };
+
+describe("LiteSVM: Create a system account", () => {
+	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(2 * LAMPORTS_PER_SOL));
+
+	const programPath = new URL(
+		"../target/deploy/rent_example.so",
+		import.meta.url,
+	).pathname;
+	svm.addProgramFromFile(programId, programPath);
+
+	it("Create the account", () => {
+		const newKeypair = Keypair.generate();
+
+		const ixArgs = {
+			address_data: {
+				name: "Marcus",
+				address: "123 Main St. San Francisco, CA",
+			},
+		};
+
+		/**
+		 * Create Instructions
+		 * Create Transactions
+		 * Send Transactions
+		 */
+		const data = coder.instruction.encode("create_system_account", ixArgs);
+		const ix = new TransactionInstruction({
+			keys: [
+				{ pubkey: payer.publicKey, isSigner: true, isWritable: true },
+				{ pubkey: newKeypair.publicKey, isSigner: true, 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, newKeypair);
+		svm.sendTransaction(tx);
+
+		/**
+		 * We're just going to serialize our object here so we can check
+		 * the size on the client side against the program logs
+		 */
+		const addressDataBuffer = coder.types.encode(
+			"AddressData",
+			ixArgs.address_data,
+		);
+
+		//Fetch newKeypair account and check its rent for space
+		const newKeypairInfo = svm.getAccount(newKeypair.publicKey);
+
+		assert.equal(newKeypairInfo.data.length, addressDataBuffer.length);
+	});
+});