2 files changed, 71 insertions, 0 deletions
diff --git a/cli/tests/integration_tests.rs b/cli/tests/integration_tests.rs
index 29c4ac1d0..7fd531c29 100644
--- a/cli/tests/integration_tests.rs
+++ b/cli/tests/integration_tests.rs
@@ -1,8 +1,61 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 #[macro_use]
 extern crate lazy_static;
+#[cfg(unix)]
+extern crate nix;
+#[cfg(unix)]
+extern crate pty;
 extern crate tempfile;
 
+#[cfg(unix)]
+#[test]
+pub fn test_raw_tty() {
+  use pty::fork::*;
+  use std::io::{Read, Write};
+
+  let fork = Fork::from_ptmx().unwrap();
+
+  if let Ok(mut master) = fork.is_parent() {
+    let mut obytes: [u8; 100] = [0; 100];
+    let mut nread = master.read(&mut obytes).unwrap();
+    assert_eq!(String::from_utf8_lossy(&obytes[0..nread]), "S");
+    master.write_all(b"a").unwrap();
+    nread = master.read(&mut obytes).unwrap();
+    assert_eq!(String::from_utf8_lossy(&obytes[0..nread]), "A");
+    master.write_all(b"b").unwrap();
+    nread = master.read(&mut obytes).unwrap();
+    assert_eq!(String::from_utf8_lossy(&obytes[0..nread]), "B");
+    master.write_all(b"c").unwrap();
+    nread = master.read(&mut obytes).unwrap();
+    assert_eq!(String::from_utf8_lossy(&obytes[0..nread]), "C");
+  } else {
+    use deno::test_util::*;
+    use nix::sys::termios;
+    use std::os::unix::io::AsRawFd;
+    use std::process::*;
+    use tempfile::TempDir;
+
+    // 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 deno_dir = TempDir::new().expect("tempdir fail");
+    let mut child = Command::new(deno_exe_path())
+      .env("DENO_DIR", deno_dir.path())
+      .current_dir(util::root_path())
+      .arg("run")
+      .arg("cli/tests/raw_mode.ts")
+      .stdin(Stdio::inherit())
+      .stdout(Stdio::inherit())
+      .stderr(Stdio::null())
+      .spawn()
+      .expect("Failed to spawn script");
+    child.wait().unwrap();
+  }
+}
+
 #[test]
 fn test_pattern_match() {
   assert!(util::pattern_match("foo[BAR]baz", "foobarbaz", "[BAR]"));
diff --git a/cli/tests/raw_mode.ts b/cli/tests/raw_mode.ts
new file mode 100644
index 000000000..125601b2b
--- /dev/null
+++ b/cli/tests/raw_mode.ts
@@ -0,0 +1,18 @@
+Deno.setRaw(0, true);
+Deno.setRaw(0, true); // Can be called multiple times
+
+Deno.stdout.writeSync(new TextEncoder().encode("S"));
+
+const buf = new Uint8Array(3);
+for (let i = 0; i < 3; i++) {
+  const nread = await Deno.stdin.read(buf);
+  if (nread === Deno.EOF) {
+    break;
+  } else {
+    const data = new TextDecoder().decode(buf.subarray(0, nread));
+    Deno.stdout.writeSync(new TextEncoder().encode(data.toUpperCase()));
+  }
+}
+
+Deno.setRaw(0, false); // restores old mode.
+Deno.setRaw(0, false); // Can be safely called multiple times