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#[macro_use]
extern crate pretty_assertions;
#[macro_use]
extern crate derive_builder;
use std::clone::Clone;
use std::fmt::Display;
#[derive(Debug, PartialEq, Default, Builder, Clone)]
struct Generic<T: Display>
where
T: Clone,
{
ipsum: &'static str,
pub dolor: T,
}
#[derive(Debug, PartialEq, Default, Builder, Clone)]
pub struct GenericReference<'a, T: 'a + Default>
where
T: Display,
{
pub bar: Option<&'a T>,
}
#[test]
fn error_if_uninitialized() {
let error = GenericBuilder::<String>::default().build().unwrap_err();
assert_eq!(&error.to_string(), "`ipsum` must be initialized");
}
#[test]
fn generic_builder() {
let x = GenericBuilder::default()
.ipsum("Generic")
.dolor(true)
.build()
.unwrap();
assert_eq!(
x,
Generic {
ipsum: "Generic".into(),
dolor: true,
}
);
}
#[test]
fn generic_reference_builder() {
static BAR: u32 = 42;
let x = GenericReferenceBuilder::<'static, u32>::default()
.bar(Some(&BAR))
.build()
.unwrap();
assert_eq!(x, GenericReference { bar: Some(&BAR) });
}
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