2 unstable releases
0.2.0 | Sep 15, 2022 |
---|---|
0.1.0 | Sep 14, 2022 |
#48 in #stub
4KB
stub_trait
Macro to implement stub object for a trait.
Overview
Stub traits is a technique to simulate some comportments or to avoid to be blocked by a specific part of the code that is not implemented yet.
Usage
stub_trait is generally only used by tests. Add the following snippet into your Cargo.toml
:
[dev-dependencies]
stub_trait = "0.2.0"
You can use it like this:
#[cfg(test)]
use stub_trait::stub;
#[cfg_attr(test, stub)]
trait Animal {
fn name(&self) -> &str;
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn stub_all_calls() {
let mut animal = StubAnimal::default();
animal.stub_all_calls_of_name(|| "Ivana");
assert_eq!(animal.name(), "Ivana");
assert_eq!(animal.name(), "Ivana");
assert_eq!(animal.count_calls_of_name(), 2);
}
#[test]
fn stub_call_by_call() {
let mut animal = StubAnimal::default();
animal.register_stub_of_name(|| "Ivana");
animal.register_stub_of_name(|| "Truffle");
assert_eq!(animal.name(), "Ivana");
assert_eq!(animal.name(), "Truffle");
assert_eq!(animal.count_calls_of_name(), 2);
}
}
Contributing
See CONTRIBUTING.md file.