anchor-litesvm

anchor-litesvm

anchor-litesvm is a small extension to LiteSVM that enables using both Anchor and LiteSVM with minimal code changes. It does this by exporting a LitesvmProvider class that can be used as a replacement for AnchorProvider during testing.

Async note

litesvm is synchronous because it is entirely compute-bound. However, anchor-litesvm uses async because it implements interfaces that require async. If you would like to avoid async tests, you can simply use regular litesvm without anchor-litesvm.

Usage

Here's an example using LitesvmProvider to test an Anchor program:

import { fromWorkspace, LiteSVMProvider } from "anchor-litesvm";
import { Keypair, PublicKey } from "@solana/web3.js";
import { BN, Program, Wallet } from "@coral-xyz/anchor";
import { Puppet } from "./anchor-example/puppet";
const IDL = require("./anchor-example/puppet.json");

test("anchor", async () => {
	const client = fromWorkspace("tests/anchor-example");
	const provider = new LiteSVMProvider(client);
	const puppetProgram = new Program<Puppet>(IDL, provider);
	const puppetKeypair = Keypair.generate();
	await puppetProgram.methods
		.initialize()
		.accounts({
			puppet: puppetKeypair.publicKey,
		})
		.signers([puppetKeypair])
		.rpc();

	const data = new BN(123456);
	await puppetProgram.methods
		.setData(data)
		.accounts({
			puppet: puppetKeypair.publicKey,
		})
		.rpc();

	const dataAccount = await puppetProgram.account.data.fetch(
		puppetKeypair.publicKey,
	);
	expect(dataAccount.data.eq(new BN(123456)));
});

Installation

yarn add anchor-litesvm