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return_self_method.rs
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return_self_method.rs
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#![allow(clippy::redundant_clone)]
use std::{rc::Rc, sync::Arc};
type Result<T> = std::result::Result<T, ()>;
#[faux::create]
#[derive(Debug)]
pub struct Foo {
a: i32,
}
pub struct FooError {}
#[faux::methods]
impl Clone for Foo {
fn clone(&self) -> Self {
Self { a: self.a }
}
}
#[faux::methods]
impl Foo {
pub fn new(a: i32) -> Self {
Foo { a }
}
pub fn get(&self) -> i32 {
self.a
}
pub fn create_similar(&self) -> Self {
Foo { a: self.a + 1 }
}
pub fn new_boxed() -> Box<Self> {
Box::new(Foo { a: 0 })
}
pub fn new_rc() -> Rc<Self> {
Rc::new(Foo { a: 1 })
}
pub fn new_arc() -> Arc<Self> {
Arc::new(Foo { a: 2 })
}
pub fn new_result() -> std::result::Result<Self, Box<dyn std::error::Error>> {
Ok(Foo { a: 3 })
}
pub fn new_option() -> Option<Self> {
Some(Foo { a: 2 })
}
pub fn similar_name() -> FooError {
FooError {}
}
#[allow(clippy::result_unit_err)]
pub fn new_aliased_result() -> Result<Self> {
Ok(Foo { a: 0 })
}
}
#[test]
fn clone_real_instances() {
let real = Foo::new(3);
let cloned = real.clone();
assert_eq!(cloned.get(), 3);
}
#[test]
fn clone_mock_instances() {
let mut mock = Foo::faux();
faux::when!(mock.get()).then_return(20);
faux::when!(mock.clone()).then(|_| {
let mut other_mock = Foo::faux();
faux::when!(other_mock.get()).then_return(30);
other_mock
});
let cloned = mock.clone();
assert_eq!(cloned.get(), 30);
faux::when!(mock.clone()).then_return(Foo::new(5));
let cloned = mock.clone();
assert_eq!(cloned.get(), 5);
}
#[test]
fn create_from_real_instances() {
let real = Foo::new(3);
let similar = real.create_similar();
assert_eq!(similar.get(), 4);
}
#[test]
fn create_from_mock_instances() {
let mut mock = Foo::faux();
faux::when!(mock.create_similar()).then(|_| {
let mut other_mock = Foo::faux();
faux::when!(other_mock.get()).then_return(99);
other_mock
});
let similar = mock.create_similar();
assert_eq!(similar.get(), 99);
faux::when!(mock.create_similar()).then_return(Foo::new(5));
let similar = mock.create_similar();
assert_eq!(similar.get(), 5);
}