{"id":57365,"library":"mockall","title":"Mockall","description":"A powerful mock object library for Rust, enabling easy creation of mock structs and traits for testing.","status":"active","version":"0.14.0","language":"rust","source_language":null,"source_url":"https://github.com/asomers/mockall","tags":["mock","testing","trait","automock"],"install":[{"cmd":"# Cargo.toml\n[dependencies]\nmockall = \"0.14.0\"","lang":"toml","label":"Cargo.toml"},{"cmd":"cargo add mockall","lang":"bash","label":"cargo add"}],"dependencies":[],"imports":[{"symbol":"automock","correct":"use mockall::automock;"}],"quickstart":{"code":"use mockall::automock;\n\n#[automock]\npub trait MyTrait {\n    fn do_something(&self) -> i32;\n}\n\nlet mock = MockMyTrait::new();\nmock.expect_do_something().returning(|| 42);\nassert_eq!(mock.do_something(), 42);","lang":"rust","description":"Define a mock trait using `#[automock]` and set expectations."},"warnings":[{"fix":"Place `#[automock]` before other derive macros like `#[derive(Debug)]`.","message":"Mockall generates code that may conflict with other derive macros; order of attributes matters.","severity":"gotcha","affected_versions":">=0.14.0"}],"env_vars":null,"search_vec":"'automock':22 'creation':11 'easi':10 'enabl':9 'librari':6 'mock':4,13,19 'mockal':1 'object':5 'power':3 'rust':8 'struct':14 'test':18,20 'trait':16,21","created_at":"2026-06-16T15:39:27.482588+00:00","updated_at":"2026-06-16T15:39:27.482588+00:00","problems":[],"ecosystem":"crates","meta_description":null,"install_score":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":null,"cli_version":null,"type":"library","homepage":"https://github.com/asomers/mockall","github":"https://github.com/asomers/mockall","docs":"https://docs.rs/mockall/","changelog":null,"pypi":null,"npm":null,"openapi_spec":null,"status_page":null,"smithery":null,"categories":["testing"],"base_url":null,"auth_type":null,"provenance":{"verified_status":null,"verified_at":null,"last_verified":"2026-06-16","next_check":"2026-12-13","install_tag":null}}