Mollusk

Solana program testing tools.

Harness

The harness is designed to directly invoke the loaded executable program using the BPF Loader, bypassing any transaction sanitization and runtime checks, and instead directly processing the instruction with the BPF Loader.

Example:

let program_id = Pubkey::new_unique();
let key1 = Pubkey::new_unique();
let key2 = Pubkey::new_unique();

let instruction = Instruction::new_with_bytes(
    program_id,
    &[],
    vec![
        AccountMeta::new(key1, false),
        AccountMeta::new_readonly(key2, false),
    ],
);

let accounts = vec![
    (key1, AccountSharedData::new(10_000, 0, &system_program::id())),
    (key2, AccountSharedData::new(10_000, 0, &system_program::id())),
];

let mollusk = Mollusk::new(program_id, "my_program");

let result = mollusk.process_instruction(instruction, accounts);

Bencher

Mollusk also offers a compute unit usage bencher for profiling a program's compute unit usage.

Example:

MolluskComputeUnitBencher::new(mollusk)
    .benchmark(BENCHMARK_COMPUTE_UNITS)
    .bench("bench1", instruction1, accounts1)
    .bench("bench2", instruction2, accounts2)
    .bench("bench3", instruction3, accounts3)
    .iterations(100)
    .must_pass(true)
    .out_dir("../target/benches")
    .execute();

You can invoke this benchmark test with cargo bench.

Mollusk will output bench details to the output directory in both JSON and Markdown.

Markdown example:

Name	Median	Mark Delta
bench1	579	+129
bench2	1,204	+754
bench3	2,811	+2,361