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#[macro_use]
extern crate derive_builder;
#[derive(Debug, Clone, Builder, PartialEq, Eq)]
#[builder(build_fn(validate = "LoremBuilder::validate"))]
pub struct Lorem {
/// A percentile. Must be between 0 and 100.
my_effort: u8,
/// A percentile. Must be less than or equal to `Lorem::my_effort`.
#[builder(default = "40")]
their_effort: u8,
/// A percentile. Must be between 0 and 100.
rivals_effort: u8,
}
impl LoremBuilder {
/// Performs bound checks.
fn validate(&self) -> Result<(), String> {
if let Some(ref my_effort) = self.my_effort {
if *my_effort > 100 {
return Err("Don't wear yourself out".to_string());
}
}
if let Some(ref their_effort) = self.their_effort {
if *their_effort > 100 {
return Err("The game has changed".to_string());
}
}
if let Some(ref rivals_effort) = self.rivals_effort {
if *rivals_effort > 100 {
return Err("Your rival is cheating".to_string());
}
}
Ok(())
}
}
#[test]
fn out_of_bounds() {
assert_eq!(
&LoremBuilder::default()
.my_effort(120)
.build()
.unwrap_err()
.to_string(),
"Don't wear yourself out"
);
assert_eq!(
&LoremBuilder::default()
.rivals_effort(120)
.build()
.unwrap_err()
.to_string(),
"Your rival is cheating"
);
}
#[test]
fn validation_pass() {
let lorem = LoremBuilder::default()
.my_effort(90)
.rivals_effort(89)
.build()
.expect("All validations should be passing");
assert_eq!(
lorem,
Lorem {
my_effort: 90,
rivals_effort: 89,
their_effort: 40,
}
);
}
|
