diff options
Diffstat (limited to 'vendor/thiserror/tests/test_display.rs')
-rw-r--r-- | vendor/thiserror/tests/test_display.rs | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/vendor/thiserror/tests/test_display.rs b/vendor/thiserror/tests/test_display.rs new file mode 100644 index 000000000..949d9eda7 --- /dev/null +++ b/vendor/thiserror/tests/test_display.rs @@ -0,0 +1,274 @@ +#![deny(clippy::all, clippy::pedantic)] + +use std::fmt::Display; +use thiserror::Error; + +fn assert<T: Display>(expected: &str, value: T) { + assert_eq!(expected, value.to_string()); +} + +#[test] +fn test_braced() { + #[derive(Error, Debug)] + #[error("braced error: {msg}")] + struct Error { + msg: String, + } + + let msg = "T".to_owned(); + assert("braced error: T", Error { msg }); +} + +#[test] +fn test_braced_unused() { + #[derive(Error, Debug)] + #[error("braced error")] + struct Error { + extra: usize, + } + + assert("braced error", Error { extra: 0 }); +} + +#[test] +fn test_tuple() { + #[derive(Error, Debug)] + #[error("tuple error: {0}")] + struct Error(usize); + + assert("tuple error: 0", Error(0)); +} + +#[test] +fn test_unit() { + #[derive(Error, Debug)] + #[error("unit error")] + struct Error; + + assert("unit error", Error); +} + +#[test] +fn test_enum() { + #[derive(Error, Debug)] + enum Error { + #[error("braced error: {id}")] + Braced { id: usize }, + #[error("tuple error: {0}")] + Tuple(usize), + #[error("unit error")] + Unit, + } + + assert("braced error: 0", Error::Braced { id: 0 }); + assert("tuple error: 0", Error::Tuple(0)); + assert("unit error", Error::Unit); +} + +#[test] +fn test_constants() { + #[derive(Error, Debug)] + #[error("{MSG}: {id:?} (code {CODE:?})")] + struct Error { + id: &'static str, + } + + const MSG: &str = "failed to do"; + const CODE: usize = 9; + + assert("failed to do: \"\" (code 9)", Error { id: "" }); +} + +#[test] +fn test_inherit() { + #[derive(Error, Debug)] + #[error("{0}")] + enum Error { + Some(&'static str), + #[error("other error")] + Other(&'static str), + } + + assert("some error", Error::Some("some error")); + assert("other error", Error::Other("...")); +} + +#[test] +fn test_brace_escape() { + #[derive(Error, Debug)] + #[error("fn main() {{}}")] + struct Error; + + assert("fn main() {}", Error); +} + +#[test] +fn test_expr() { + #[derive(Error, Debug)] + #[error("1 + 1 = {}", 1 + 1)] + struct Error; + assert("1 + 1 = 2", Error); +} + +#[test] +fn test_nested() { + #[derive(Error, Debug)] + #[error("!bool = {}", not(.0))] + struct Error(bool); + + #[allow(clippy::trivially_copy_pass_by_ref)] + fn not(bool: &bool) -> bool { + !*bool + } + + assert("!bool = false", Error(true)); +} + +#[test] +fn test_match() { + #[derive(Error, Debug)] + #[error("{}: {0}", match .1 { + Some(n) => format!("error occurred with {}", n), + None => "there was an empty error".to_owned(), + })] + struct Error(String, Option<usize>); + + assert( + "error occurred with 1: ...", + Error("...".to_owned(), Some(1)), + ); + assert( + "there was an empty error: ...", + Error("...".to_owned(), None), + ); +} + +#[test] +fn test_void() { + #[allow(clippy::empty_enum)] + #[derive(Error, Debug)] + #[error("...")] + pub enum Error {} + + let _: Error; +} + +#[test] +fn test_mixed() { + #[derive(Error, Debug)] + #[error("a={a} :: b={} :: c={c} :: d={d}", 1, c = 2, d = 3)] + struct Error { + a: usize, + d: usize, + } + + assert("a=0 :: b=1 :: c=2 :: d=3", Error { a: 0, d: 0 }); +} + +#[test] +fn test_ints() { + #[derive(Error, Debug)] + enum Error { + #[error("error {0}")] + Tuple(usize, usize), + #[error("error {0}", '?')] + Struct { v: usize }, + } + + assert("error 9", Error::Tuple(9, 0)); + assert("error ?", Error::Struct { v: 0 }); +} + +#[test] +fn test_trailing_comma() { + #[derive(Error, Debug)] + #[error( + "error {0}", + )] + #[rustfmt::skip] + struct Error(char); + + assert("error ?", Error('?')); +} + +#[test] +fn test_field() { + #[derive(Debug)] + struct Inner { + data: usize, + } + + #[derive(Error, Debug)] + #[error("{}", .0.data)] + struct Error(Inner); + + assert("0", Error(Inner { data: 0 })); +} + +#[test] +fn test_macro_rules() { + // Regression test for https://github.com/dtolnay/thiserror/issues/86 + + macro_rules! decl_error { + ($variant:ident($value:ident)) => { + #[derive(Debug, Error)] + pub enum Error0 { + #[error("{0:?}")] + $variant($value), + } + + #[derive(Debug, Error)] + #[error("{0:?}")] + pub enum Error1 { + $variant($value), + } + }; + } + + decl_error!(Repro(u8)); + + assert("0", Error0::Repro(0)); + assert("0", Error1::Repro(0)); +} + +#[test] +fn test_raw() { + #[derive(Error, Debug)] + #[error("braced raw error: {r#fn}")] + struct Error { + r#fn: &'static str, + } + + assert("braced raw error: T", Error { r#fn: "T" }); +} + +#[test] +fn test_raw_enum() { + #[derive(Error, Debug)] + enum Error { + #[error("braced raw error: {r#fn}")] + Braced { r#fn: &'static str }, + } + + assert("braced raw error: T", Error::Braced { r#fn: "T" }); +} + +#[test] +fn test_raw_conflict() { + #[derive(Error, Debug)] + enum Error { + #[error("braced raw error: {r#func}, {func}", func = "U")] + Braced { r#func: &'static str }, + } + + assert("braced raw error: T, U", Error::Braced { r#func: "T" }); +} + +#[test] +fn test_keyword() { + #[derive(Error, Debug)] + #[error("error: {type}", type = 1)] + struct Error; + + assert("error: 1", Error); +} |