2 files changed, 747 insertions, 0 deletions

diff --git a/third_party/rust/error-chain/tests/quick_main.rs b/third_party/rust/error-chain/tests/quick_main.rs
new file mode 100644
index 0000000000..4ada3b4e03
--- /dev/null
+++ b/third_party/rust/error-chain/tests/quick_main.rs
@@ -0,0 +1,28 @@
+#![allow(dead_code)]
+#[macro_use]
+extern crate error_chain;
+
+error_chain!();
+
+mod unit {
+    use super::*;
+    quick_main!(run);
+
+    fn run() -> Result<()> {
+        Ok(())
+    }
+}
+
+mod i32 {
+    use super::*;
+    quick_main!(run);
+
+    fn run() -> Result<i32> {
+        Ok(1)
+    }
+}
+
+mod closure {
+    use super::*;
+    quick_main!(|| -> Result<()> { Ok(()) });
+}
diff --git a/third_party/rust/error-chain/tests/tests.rs b/third_party/rust/error-chain/tests/tests.rs
new file mode 100644
index 0000000000..e9d183c577
--- /dev/null
+++ b/third_party/rust/error-chain/tests/tests.rs
@@ -0,0 +1,719 @@
+#![allow(dead_code)]
+
+#[macro_use]
+extern crate error_chain;
+
+#[test]
+fn smoke_test_1() {
+    error_chain! {
+        types {
+            Error, ErrorKind, ResultExt, Result;
+        }
+
+        links { }
+
+        foreign_links { }
+
+        errors { }
+    };
+}
+
+#[test]
+fn smoke_test_2() {
+    error_chain! {
+        types { }
+
+        links { }
+
+        foreign_links { }
+
+        errors { }
+    };
+}
+
+#[test]
+fn smoke_test_3() {
+    error_chain! {
+        links { }
+
+        foreign_links { }
+
+        errors { }
+    };
+}
+
+#[test]
+fn smoke_test_4() {
+    error_chain! {
+        links { }
+
+        foreign_links { }
+
+        errors {
+            HttpStatus(e: u32) {
+                description("http request returned an unsuccessful status code")
+                display("http request returned an unsuccessful status code: {}", e)
+            }
+        }
+    };
+}
+
+#[test]
+fn smoke_test_5() {
+    error_chain! {
+        types { }
+
+        links { }
+
+        foreign_links { }
+
+        errors {
+            HttpStatus(e: u32) {
+                description("http request returned an unsuccessful status code")
+                display("http request returned an unsuccessful status code: {}", e)
+            }
+        }
+    };
+}
+
+#[test]
+fn smoke_test_6() {
+    error_chain! {
+        errors {
+            HttpStatus(e: u32) {
+                description("http request returned an unsuccessful status code")
+                display("http request returned an unsuccessful status code: {}", e)
+            }
+        }
+    };
+}
+
+#[test]
+fn smoke_test_7() {
+    error_chain! {
+        types { }
+
+        foreign_links { }
+
+        errors {
+            HttpStatus(e: u32) {
+                description("http request returned an unsuccessful status code")
+                display("http request returned an unsuccessful status code: {}", e)
+            }
+        }
+    };
+}
+
+#[test]
+fn smoke_test_8() {
+    error_chain! {
+        types { }
+
+        links { }
+        links { }
+
+        foreign_links { }
+        foreign_links { }
+
+        errors {
+            FileNotFound
+            AccessDenied
+        }
+    };
+}
+
+#[test]
+fn order_test_1() {
+    error_chain! { types { } links { } foreign_links { } errors { } };
+}
+
+#[test]
+fn order_test_2() {
+    error_chain! { links { } types { } foreign_links { } errors { } };
+}
+
+#[test]
+fn order_test_3() {
+    error_chain! { foreign_links { }  links { }  errors { } types { } };
+}
+
+#[test]
+fn order_test_4() {
+    error_chain! { errors { } types { } foreign_links { } };
+}
+
+#[test]
+fn order_test_5() {
+    error_chain! { foreign_links { } types { }  };
+}
+
+#[test]
+fn order_test_6() {
+    error_chain! {
+        links { }
+
+        errors {
+            HttpStatus(e: u32) {
+                description("http request returned an unsuccessful status code")
+                display("http request returned an unsuccessful status code: {}", e)
+            }
+        }
+
+
+        foreign_links { }
+    };
+}
+
+#[test]
+fn order_test_7() {
+    error_chain! {
+        links { }
+
+        foreign_links { }
+
+        types {
+            Error, ErrorKind, ResultExt, Result;
+        }
+    };
+}
+
+#[test]
+fn order_test_8() {
+    error_chain! {
+        links { }
+
+        foreign_links { }
+        foreign_links { }
+
+        types {
+            Error, ErrorKind, ResultExt, Result;
+        }
+    };
+}
+
+#[test]
+fn empty() {
+    error_chain! {};
+}
+
+#[test]
+#[cfg(feature = "backtrace")]
+fn has_backtrace_depending_on_env() {
+    use std::path::PathBuf;
+    use std::process::Command;
+
+    let cmd_folder = if cfg!(build = "debug") {
+        "debug"
+    } else if cfg!(build = "release") {
+        "release"
+    } else {
+        panic!("Unknown build config");
+    };
+
+    let cmd_path = if cfg!(windows) {
+        PathBuf::from(format!(
+            "./target/{}/examples/has_backtrace.exe",
+            cmd_folder
+        ))
+    } else {
+        PathBuf::from(format!("./target/{}/examples/has_backtrace", cmd_folder))
+    };
+    let mut cmd = Command::new(cmd_path);
+
+    // missing RUST_BACKTRACE and RUST_BACKTRACE=0
+    cmd.env_remove("RUST_BACKTRACE");
+    assert_eq!(cmd.status().unwrap().code().unwrap(), 0);
+
+    cmd.env("RUST_BACKTRACE", "0");
+    assert_eq!(cmd.status().unwrap().code().unwrap(), 0);
+
+    // RUST_BACKTRACE set to anything but 0
+    cmd.env("RUST_BACKTRACE", "yes");
+    assert_eq!(cmd.status().unwrap().code().unwrap(), 1);
+
+    cmd.env("RUST_BACKTRACE", "1");
+    assert_eq!(cmd.status().unwrap().code().unwrap(), 1);
+}
+
+#[test]
+fn chain_err() {
+    use std::fmt;
+
+    error_chain! {
+        foreign_links {
+            Fmt(fmt::Error);
+        }
+        errors {
+            Test
+        }
+    }
+
+    let _: Result<()> = Err(fmt::Error).chain_err(|| "");
+    let _: Result<()> = Err(Error::from_kind(ErrorKind::Test)).chain_err(|| "");
+}
+
+/// Verify that an error chain is extended one by `Error::chain_err`, with
+/// the new error added to the end.
+#[test]
+fn error_chain_err() {
+    error_chain! {
+        errors {
+            Test
+        }
+    }
+
+    let base = Error::from(ErrorKind::Test);
+    let ext = base.chain_err(|| "Test passes");
+
+    if let Error(ErrorKind::Msg(_), _) = ext {
+        // pass
+    } else {
+        panic!("The error should be wrapped. {:?}", ext);
+    }
+}
+
+#[test]
+fn links() {
+    mod test {
+        error_chain! {}
+    }
+
+    error_chain! {
+        links {
+            Test(test::Error, test::ErrorKind);
+        }
+    }
+}
+
+#[cfg(test)]
+mod foreign_link_test {
+
+    use std::fmt;
+
+    // Note: foreign errors must be `pub` because they appear in the
+    // signature of the public foreign_link_error_path
+    #[derive(Debug)]
+    pub struct ForeignError {
+        cause: ForeignErrorCause,
+    }
+
+    impl ::std::error::Error for ForeignError {
+        fn description(&self) -> &'static str {
+            "Foreign error description"
+        }
+
+        #[cfg(not(has_error_source))]
+        fn cause(&self) -> Option<&::std::error::Error> {
+            Some(&self.cause)
+        }
+
+        #[cfg(has_error_source)]
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            Some(&self.cause)
+        }
+    }
+
+    impl fmt::Display for ForeignError {
+        fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+            write!(formatter, "Foreign error display")
+        }
+    }
+
+    #[derive(Debug)]
+    pub struct ForeignErrorCause {}
+
+    impl ::std::error::Error for ForeignErrorCause {
+        fn description(&self) -> &'static str {
+            "Foreign error cause description"
+        }
+
+        #[cfg(not(has_error_source))]
+        fn cause(&self) -> Option<&::std::error::Error> {
+            None
+        }
+
+        #[cfg(has_error_source)]
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            None
+        }
+    }
+
+    impl fmt::Display for ForeignErrorCause {
+        fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+            write!(formatter, "Foreign error cause display")
+        }
+    }
+
+    error_chain! {
+        types{
+            Error, ErrorKind, ResultExt, Result;
+        }
+        links {}
+        foreign_links {
+            Foreign(ForeignError);
+            Io(::std::io::Error);
+        }
+        errors {}
+    }
+
+    #[test]
+    fn display_underlying_error() {
+        let chained_error = try_foreign_error().err().unwrap();
+        assert_eq!(
+            format!(
+                "{}",
+                ForeignError {
+                    cause: ForeignErrorCause {}
+                }
+            ),
+            format!("{}", chained_error)
+        );
+    }
+
+    #[test]
+    #[cfg(not(has_error_source))]
+    fn finds_cause() {
+        let chained_error = try_foreign_error().err().unwrap();
+        assert_eq!(
+            format!("{}", ForeignErrorCause {}),
+            format!("{}", ::std::error::Error::cause(&chained_error).unwrap())
+        );
+    }
+
+    #[test]
+    #[cfg(has_error_source)]
+    fn finds_source() {
+        let chained_error = try_foreign_error().err().unwrap();
+        assert_eq!(
+            format!("{}", ForeignErrorCause {}),
+            format!("{}", ::std::error::Error::source(&chained_error).unwrap())
+        );
+    }
+
+    #[test]
+    #[allow(unknown_lints, bare_trait_objects)]
+    fn iterates() {
+        let chained_error = try_foreign_error().err().unwrap();
+        let mut error_iter = chained_error.iter();
+        assert!(!format!("{:?}", error_iter).is_empty());
+        assert_eq!(
+            format!(
+                "{}",
+                ForeignError {
+                    cause: ForeignErrorCause {}
+                }
+            ),
+            format!("{}", error_iter.next().unwrap())
+        );
+        assert_eq!(
+            format!("{}", ForeignErrorCause {}),
+            format!("{}", error_iter.next().unwrap())
+        );
+        assert_eq!(
+            format!("{:?}", None as Option<&::std::error::Error>),
+            format!("{:?}", error_iter.next())
+        );
+    }
+
+    fn try_foreign_error() -> Result<()> {
+        Err(ForeignError {
+            cause: ForeignErrorCause {},
+        })?;
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod attributes_test {
+    #[allow(unused_imports)]
+    use std::io;
+
+    #[cfg(not(test))]
+    mod inner {
+        error_chain! {}
+    }
+
+    error_chain! {
+        types {
+            Error, ErrorKind, ResultExt, Result;
+        }
+
+        links {
+            Inner(inner::Error, inner::ErrorKind) #[cfg(not(test))];
+        }
+
+        foreign_links {
+            Io(io::Error) #[cfg(not(test))];
+        }
+
+        errors {
+            #[cfg(not(test))]
+            AnError {
+
+            }
+        }
+    }
+}
+
+#[test]
+fn with_result() {
+    error_chain! {
+        types {
+            Error, ErrorKind, ResultExt, Result;
+        }
+    }
+    let _: Result<()> = Ok(());
+}
+
+#[test]
+fn without_result() {
+    error_chain! {
+        types {
+            Error, ErrorKind, ResultExt;
+        }
+    }
+    let _: Result<(), ()> = Ok(());
+}
+
+#[test]
+fn documentation() {
+    mod inner {
+        error_chain! {}
+    }
+
+    error_chain! {
+        links {
+            Inner(inner::Error, inner::ErrorKind) #[doc = "Doc"];
+        }
+        foreign_links {
+            Io(::std::io::Error) #[doc = "Doc"];
+        }
+        errors {
+            /// Doc
+            Variant
+        }
+    }
+}
+
+#[cfg(test)]
+mod multiple_error_same_mod {
+    error_chain! {
+        types {
+            MyError, MyErrorKind, MyResultExt, MyResult;
+        }
+    }
+    error_chain! {}
+}
+
+#[doc(test)]
+#[deny(dead_code)]
+mod allow_dead_code {
+    error_chain! {}
+}
+
+// Make sure links actually work!
+#[test]
+fn rustup_regression() {
+    error_chain! {
+        links {
+            Download(error_chain::mock::Error, error_chain::mock::ErrorKind);
+        }
+
+        foreign_links { }
+
+        errors {
+            LocatingWorkingDir {
+                description("could not locate working directory")
+            }
+        }
+    }
+}
+
+#[test]
+fn error_patterns() {
+    error_chain! {
+        links { }
+
+        foreign_links { }
+
+        errors { }
+    }
+
+    // Tuples look nice when matching errors
+    match Error::from("Test") {
+        Error(ErrorKind::Msg(_), _) => {}
+        _ => {}
+    }
+}
+
+#[test]
+fn result_match() {
+    error_chain! {}
+
+    fn ok() -> Result<()> {
+        Ok(())
+    }
+
+    match ok() {
+        Ok(()) => {}
+        Err(Error(ErrorKind::Msg(_), _)) => {}
+        Err(..) => {}
+    }
+}
+
+#[test]
+fn error_first() {
+    error_chain! {
+        errors {
+            LocatingWorkingDir {
+                description("could not locate working directory")
+            }
+        }
+
+        links {
+            Download(error_chain::mock::Error, error_chain::mock::ErrorKind);
+        }
+
+        foreign_links { }
+    }
+}
+
+#[test]
+fn bail() {
+    error_chain! {
+        errors { Foo }
+    }
+
+    fn foo() -> Result<()> {
+        bail!(ErrorKind::Foo)
+    }
+
+    fn bar() -> Result<()> {
+        bail!("bar")
+    }
+
+    fn baz() -> Result<()> {
+        bail!("{}", "baz")
+    }
+}
+
+#[test]
+fn ensure() {
+    error_chain! {
+        errors { Bar }
+    }
+
+    fn foo(x: u8) -> Result<()> {
+        ensure!(x == 42, ErrorKind::Bar);
+        Ok(())
+    }
+
+    assert!(foo(42).is_ok());
+    assert!(foo(0).is_err());
+}
+
+/// Since the `types` declaration is a list of symbols, check if we
+/// don't change their meaning or order.
+#[test]
+fn types_declarations() {
+    error_chain! {
+        types {
+            MyError, MyErrorKind, MyResultExt, MyResult;
+        }
+    }
+
+    MyError::from_kind(MyErrorKind::Msg("".into()));
+
+    let err: Result<(), ::std::io::Error> = Ok(());
+    MyResultExt::chain_err(err, || "").unwrap();
+
+    let _: MyResult<()> = Ok(());
+}
+
+#[test]
+/// Calling chain_err over a `Result` containing an error to get a chained error
+/// and constructing a MyError directly, passing it an error should be equivalent.
+fn rewrapping() {
+    use std::env::VarError::{self, NotPresent, NotUnicode};
+
+    error_chain! {
+        foreign_links {
+            VarErr(VarError);
+        }
+
+        types {
+            MyError, MyErrorKind, MyResultExt, MyResult;
+        }
+    }
+
+    let result_a_from_func: Result<String, _> = Err(VarError::NotPresent);
+    let result_b_from_func: Result<String, _> = Err(VarError::NotPresent);
+
+    let our_error_a = result_a_from_func.map_err(|e| match e {
+        NotPresent => MyError::with_chain(e, "env var wasn't provided"),
+        NotUnicode(_) => MyError::with_chain(e, "env var was bork文字化ã"),
+    });
+
+    let our_error_b = result_b_from_func.or_else(|e| match e {
+        NotPresent => Err(e).chain_err(|| "env var wasn't provided"),
+        NotUnicode(_) => Err(e).chain_err(|| "env var was bork文字化ã"),
+    });
+
+    assert_eq!(
+        format!("{}", our_error_a.unwrap_err()),
+        format!("{}", our_error_b.unwrap_err())
+    );
+}
+
+#[test]
+fn comma_in_errors_impl() {
+    error_chain! {
+        links { }
+
+        foreign_links { }
+
+        errors {
+            HttpStatus(e: u32) {
+                description("http request returned an unsuccessful status code"),
+                display("http request returned an unsuccessful status code: {}", e)
+            }
+        }
+    };
+}
+
+#[test]
+fn trailing_comma_in_errors_impl() {
+    error_chain! {
+        links { }
+
+        foreign_links { }
+
+        errors {
+            HttpStatus(e: u32) {
+                description("http request returned an unsuccessful status code"),
+                display("http request returned an unsuccessful status code: {}", e),
+            }
+        }
+    };
+}
+
+#[test]
+fn skipping_msg_variant() {
+    error_chain! {
+        skip_msg_variant
+
+        errors {
+            MyMsg(s: String) {
+                description(&s)
+                display("{}", s)
+            }
+        }
+    }
+
+    let x = Error::from_kind(ErrorKind::MyMsg("some string".into()));
+    // This would fail to compile if we generate a `Msg` variant
+    match *x.kind() {
+        ErrorKind::MyMsg(_) => {}
+        ErrorKind::__Nonexhaustive {} => {}
+    }
+}