Move /src/test to /tests

tests/ui/alloc-error/default-alloc-error-hook.rs

@@ -0,0 +1,28 @@
+// run-pass
+// ignore-emscripten no processes
+// ignore-sgx no processes
+
+use std::alloc::{Layout, handle_alloc_error};
+use std::env;
+use std::process::Command;
+use std::str;
+
+fn main() {
+    if env::args().len() > 1 {
+        handle_alloc_error(Layout::new::<[u8; 42]>())
+    }
+
+    let me = env::current_exe().unwrap();
+    let output = Command::new(&me).arg("next").output().unwrap();
+    assert!(!output.status.success(), "{:?} is a success", output.status);
+
+    let mut stderr = str::from_utf8(&output.stderr).unwrap();
+
+    // When running inside QEMU user-mode emulation, there will be an extra message printed by QEMU
+    // in the stderr whenever a core dump happens. Remove it before the check.
+    stderr = stderr
+        .strip_suffix("qemu: uncaught target signal 6 (Aborted) - core dumped\n")
+        .unwrap_or(stderr);
+
+    assert_eq!(stderr, "memory allocation of 42 bytes failed\n");
+}