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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /third_party/rust/thiserror/tests/test_display.rs
parentInitial commit. (diff)
downloadfirefox-esr-upstream.tar.xz
firefox-esr-upstream.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/thiserror/tests/test_display.rs')
-rw-r--r--third_party/rust/thiserror/tests/test_display.rs301
1 files changed, 301 insertions, 0 deletions
diff --git a/third_party/rust/thiserror/tests/test_display.rs b/third_party/rust/thiserror/tests/test_display.rs
new file mode 100644
index 0000000000..99ce2fdede
--- /dev/null
+++ b/third_party/rust/thiserror/tests/test_display.rs
@@ -0,0 +1,301 @@
+use std::fmt::{self, 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_nested_display() {
+ // Same behavior as the one in `test_match`, but without String allocations.
+ #[derive(Error, Debug)]
+ #[error("{}", {
+ struct Msg<'a>(&'a String, &'a Option<usize>);
+ impl<'a> Display for Msg<'a> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self.1 {
+ Some(n) => write!(formatter, "error occurred with {}", n),
+ None => write!(formatter, "there was an empty error"),
+ }?;
+ write!(formatter, ": {}", self.0)
+ }
+ }
+ Msg(.0, .1)
+ })]
+ 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);
+}