fix test_raw_tty hang (denoland#8520)

cli/Cargo.toml

@@ -94,6 +94,9 @@ chrono = "0.4.15"
 os_pipe = "0.9.2"
 test_util = { path = "../test_util" }
 
+[target.'cfg(unix)'.dev-dependencies]
+exec = "0.3.1" # Used in test_raw_tty
+
 [package.metadata.winres]
 # This section defines the metadata that appears in the deno.exe PE header.
 OriginalFilename = "deno.exe"

cli/tests/integration_tests.rs

@@ -176,8 +176,9 @@ fn no_color() {
 pub fn test_raw_tty() {
   use std::io::{Read, Write};
   use util::pty::fork::*;
+
   let deno_exe = util::deno_exe_path();
-  let deno_dir = TempDir::new().expect("tempdir fail");
+  let root_path = util::root_path();
   let fork = Fork::from_ptmx().unwrap();
 
   if let Ok(mut master) = fork.is_parent() {
@@ -193,31 +194,27 @@ pub fn test_raw_tty() {
     master.write_all(b"c").unwrap();
     nread = master.read(&mut obytes).unwrap();
     assert_eq!(String::from_utf8_lossy(&obytes[0..nread]), "C");
+    fork.wait().unwrap();
   } else {
     use nix::sys::termios;
     use std::os::unix::io::AsRawFd;
-    use std::process::*;
 
     // Turn off echo such that parent is reading works properly.
     let stdin_fd = std::io::stdin().as_raw_fd();
     let mut t = termios::tcgetattr(stdin_fd).unwrap();
     t.local_flags.remove(termios::LocalFlags::ECHO);
     termios::tcsetattr(stdin_fd, termios::SetArg::TCSANOW, &t).unwrap();
 
-    let mut child = Command::new(deno_exe)
-      .env("DENO_DIR", deno_dir.path())
-      .current_dir(util::root_path())
+    std::env::set_current_dir(root_path).unwrap();
+    let err = exec::Command::new(deno_exe)
       .arg("run")
       .arg("--unstable")
+      .arg("--quiet")
+      .arg("--no-check")
       .arg("cli/tests/raw_mode.ts")
-      .stdin(Stdio::inherit())
-      .stdout(Stdio::inherit())
-      // Warning: errors may be swallowed. Try to comment stderr null if
-      // experiencing problems.
-      .stderr(Stdio::null())
-      .spawn()
-      .expect("Failed to spawn script");
-    child.wait().unwrap();
+      .exec();
+    println!("err {}", err);
+    unreachable!()
   }
 }