Add rustdoc-ui regression test for #140289

Author: GuillaumeGomez

tests/rustdoc-ui/doctest/stdout-and-stderr.rs

@@ -0,0 +1,24 @@
+// This test ensures that the output is correctly generated when the
+// doctest fails. It checks when there is stderr and stdout, no stdout
+// and no stderr/stdout.
+//
+// This is a regression test for <https://github.com/rust-lang/rust/issues/140289>.
+
+//@ edition: 2024
+//@ compile-flags:--test --test-args=--test-threads=1
+//@ normalize-stdout: "tests/rustdoc-ui/doctest" -> "$$DIR"
+//@ normalize-stdout: "finished in \d+\.\d+s" -> "finished in $$TIME"
+//@ failure-status: 101
+
+//! ```
+//! println!("######## from a DOC TEST ########");
+//! assert_eq!("doc", "test");
+//! ```
+//!
+//! ```
+//! assert_eq!("doc", "test");
+//! ```
+//!
+//! ```
+//! std::process::exit(1);
+//! ```

tests/rustdoc-ui/doctest/stdout-and-stderr.stdout

@@ -0,0 +1,68 @@
+
+running 3 tests
+test $DIR/stdout-and-stderr.rs - (line 12) ... FAILED
+test $DIR/stdout-and-stderr.rs - (line 16) ... FAILED
+test $DIR/stdout-and-stderr.rs - (line 7) ... FAILED
+
+failures:
+
+---- $DIR/stdout-and-stderr.rs - (line 12) stdout ----
+Test executable failed (exit status: 101).
+
+stderr:
+
+thread 'main' panicked at /tmp/rustdoctestSI6fSq/doctest_bundle_2024.rs:6:1:
+assertion `left == right` failed
+  left: "doc"
+ right: "test"
+stack backtrace:
+   0: __rustc::rust_begin_unwind
+   1: core::panicking::panic_fmt
+   2: core::panicking::assert_failed_inner
+   3: core::panicking::assert_failed
+   4: doctest_bundle_2024::__doctest_0::main
+   5: doctest_bundle_2024::__doctest_0::__main_fn
+   6: doctest_runner_2024::__doctest_0::TEST::{{closure}}
+   7: core::ops::function::FnOnce::call_once
+   8: doctest_runner_2024::main
+   9: core::ops::function::FnOnce::call_once
+note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
+
+
+---- $DIR/stdout-and-stderr.rs - (line 16) stdout ----
+Test executable failed (exit status: 1).
+
+---- $DIR/stdout-and-stderr.rs - (line 7) stdout ----
+Test executable failed (exit status: 101).
+
+stdout:
+######## from a DOC TEST ########
+
+stderr:
+
+thread 'main' panicked at /tmp/rustdoctestSI6fSq/doctest_bundle_2024.rs:23:1:
+assertion `left == right` failed
+  left: "doc"
+ right: "test"
+stack backtrace:
+   0: __rustc::rust_begin_unwind
+   1: core::panicking::panic_fmt
+   2: core::panicking::assert_failed_inner
+   3: core::panicking::assert_failed
+   4: doctest_bundle_2024::__doctest_2::main
+   5: doctest_bundle_2024::__doctest_2::__main_fn
+   6: doctest_runner_2024::__doctest_2::TEST::{{closure}}
+   7: core::ops::function::FnOnce::call_once
+   8: doctest_runner_2024::main
+   9: core::ops::function::FnOnce::call_once
+note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
+
+
+
+failures:
+    $DIR/stdout-and-stderr.rs - (line 12)
+    $DIR/stdout-and-stderr.rs - (line 16)
+    $DIR/stdout-and-stderr.rs - (line 7)
+
+test result: FAILED. 0 passed; 3 failed; 0 ignored; 0 measured; 0 filtered out; finished in $TIME
+