# Moq
[
](https://crates.io/crates/moq)
[
](https://docs.rs/moq)
[
](https://github.com/LazyMechanic/moq/actions)
This library provides macro that provides mock struct generating that implements trait.
```toml
[dependencies]
moq = "0.3"
```
## Usage example
```rust
#[moq::automock]
trait Trait {
fn func(&self, arg: i64) -> String;
}
#[test]
fn test_ok() {
let mock = TraitMock::new()
.expect_func(|arg: i64| {
assert_eq!(arg, 42);
format!("Hello, {}", arg)
})
.expect_func(|arg: i64| {
assert_eq!(arg, -1);
format!("Hello again, {}", -1)
});
mock.func(42);
mock.func(-1);
}
#[test]
fn test_failed_extra_call() {
let mock = TraitMock::new()
.expect_func(|arg: i64| {
assert_eq!(arg, 42);
format!("Hello, {}", arg)
});
mock.func(42);
mock.func(-1); // Panic here
}
#[test]
fn test_failed_missing_call() {
let mock = TraitMock::new()
.expect_func(|arg: i64| {
assert_eq!(arg, 42);
format!("Hello, {}", arg)
})
.expect_func(|arg: i64| {
assert_eq!(arg, -1);
format!("Hello again, {}", -1)
});
mock.func(42);
// Panic here
}
```
`async_trait` also works, but the main limitation is to specify the `automock` macro above the `async_trait`
```rust
#[moq::automock]
#[async_trait::async_trait]
trait Trait {
async fn func(&self, arg: i64) -> String;
}
#[tokio::test]
async fn test_ok() {
let mock = TraitMock::new()
.expect_func(|arg: i64| async {
assert_eq!(arg, 42);
format!("Hello, {}", arg)
});
mock.func(42).await;
}
```
You can find more examples in the tests.
## TODO
- [x] Supporting generic functions
- [ ] Supporting static functions
- [ ] Macro `moq::mock!(..)` for generating mock struct for external trait
- [ ] Generating mock struct for struct without trait
- [ ] Capturing environment in `moq::lambda!`
#### License
Licensed under either of Apache License, Version
2.0 or MIT license at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.