chore: checkpoint before Python removal

vendor/unsafe-libyaml/tests/bin/mod.rs

@@ -0,0 +1,48 @@
+use std::error::Error;
+use std::fs::File;
+use std::io::{Read, Write};
+use std::path::Path;
+use std::process::{Command, Stdio};
+
+pub struct Output {
+    pub success: bool,
+    pub stdout: Vec<u8>,
+    pub stderr: Vec<u8>,
+}
+
+pub fn run(
+    compiled: &str,
+    unsafe_main: unsafe fn(
+        stdin: &mut dyn Read,
+        stdout: &mut dyn Write,
+    ) -> Result<(), Box<dyn Error>>,
+    input: &Path,
+) -> Output {
+    if cfg!(miri) {
+        let mut input = File::open(input).unwrap();
+        let mut stdout = Vec::new();
+        let result = unsafe { unsafe_main(&mut input, &mut stdout) };
+
+        Output {
+            success: result.is_ok(),
+            stdout,
+            stderr: result
+                .err()
+                .as_ref()
+                .map_or_else(String::new, ToString::to_string)
+                .into(),
+        }
+    } else {
+        let output = Command::new(compiled)
+            .arg(input)
+            .stdin(Stdio::null())
+            .output()
+            .unwrap();
+
+        Output {
+            success: output.status.success(),
+            stdout: output.stdout,
+            stderr: output.stderr,
+        }
+    }
+}