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|
#[macro_use]
extern crate pretty_assertions;
#[macro_use]
extern crate derive_builder;
mod field_level {
use derive_builder::UninitializedFieldError;
#[derive(Debug, PartialEq, Default, Builder, Clone)]
struct Lorem {
required: String,
#[builder(default)]
explicit_default: String,
#[builder(default = "\"foo\".to_string()")]
escaped_default: String,
#[builder(default = r#"format!("Hello {}!", "World")"#)]
raw_default: String,
#[builder(default = r#"format!("{}-{}-{}-{}",
Clone::clone(self.required
.as_ref()
.ok_or_else(|| UninitializedFieldError::new("required"))?),
match self.explicit_default { Some(ref x) => x, None => "EMPTY" },
self.escaped_default.as_ref().map(|x| x.as_ref()).unwrap_or("EMPTY"),
if let Some(ref x) = self.raw_default { x } else { "EMPTY" })"#)]
computed_default: String,
}
#[test]
fn error_if_uninitialized() {
let error = LoremBuilder::default().build().unwrap_err();
assert_eq!(&error.to_string(), "`required` must be initialized");
}
#[test]
fn custom_default() {
let x = LoremBuilder::default()
.required("ipsum".to_string())
.build()
.unwrap();
assert_eq!(
x,
Lorem {
required: "ipsum".to_string(),
explicit_default: "".to_string(),
escaped_default: "foo".to_string(),
raw_default: "Hello World!".to_string(),
computed_default: "ipsum-EMPTY-EMPTY-EMPTY".to_string(),
}
);
}
#[test]
fn builder_test() {
let x = LoremBuilder::default()
.required("ipsum".to_string())
.explicit_default("lorem".to_string())
.escaped_default("dolor".to_string())
.raw_default("sit".to_string())
.build()
.unwrap();
assert_eq!(
x,
Lorem {
required: "ipsum".to_string(),
explicit_default: "lorem".to_string(),
escaped_default: "dolor".to_string(),
raw_default: "sit".to_string(),
computed_default: "ipsum-lorem-dolor-sit".to_string(),
}
);
}
}
mod struct_level {
#[derive(Debug, Clone, PartialEq, Eq, Builder)]
#[builder(default = "explicit_default()")]
struct Lorem {
#[builder(default = "true")]
overwritten: bool,
not_type_default: Option<&'static str>,
}
fn explicit_default() -> Lorem {
Lorem {
overwritten: false,
not_type_default: Some("defined on struct-level"),
}
}
#[derive(Debug, Clone, PartialEq, Eq, Builder)]
#[builder(default)]
struct Ipsum {
not_type_default: Option<u16>,
also_custom: bool,
is_type_default: String,
}
impl Default for Ipsum {
fn default() -> Self {
Ipsum {
not_type_default: Some(20),
also_custom: true,
is_type_default: Default::default(),
}
}
}
#[test]
fn explicit_defaults_are_equal() {
let lorem = LoremBuilder::default().build().unwrap();
assert_eq!(
lorem,
Lorem {
overwritten: true,
..explicit_default()
}
);
}
#[test]
fn implicit_defaults_are_equal() {
let ipsum = IpsumBuilder::default().build().unwrap();
assert_eq!(ipsum, Ipsum::default());
}
#[test]
fn overrides_work() {
let ipsum = IpsumBuilder::default()
.not_type_default(None)
.build()
.expect("Struct-level default makes all fields optional");
assert_eq!(ipsum.not_type_default, None);
}
}
|
