Hooks
Laboratory comes with four different types of hooks.
- before all
- before each
- after each
- after all
The hooks can be set by calling the respective method from the suite parameter.
describe("add_one()", |suite| {
suite.before_all(|_| {
println!("\n\n before_all hook called");
}).before_each(|_| {
println!(" before_each hook called");
}).after_each(|_| {
println!(" after_each hook called");
}).after_all(|_| {
println!(" after_all hook called");
});
})
The callback from any of these methods also pass the suite’s state as a parameter.
describe("add_one()", |suite| {
suite.before_all(|state| {
state.insert("/counter", 0);
}).before_each(|state| {
let mut counter = state.get_mut(&"/counter").unwrap();
*counter += 1;
}).after_each(|state| {
println!("Counter: {}", state.get(&"/counter").unwrap());
}).after_all(|state| {
println!("Final Count: {}", state.get(&"/counter").unwrap());
});
})
The before each and after each hooks will be called for each test ran in the suite and also in every child suite.