1 files changed, 68 insertions, 0 deletions
diff --git a/tests/pipe.rs b/tests/pipe.rs
new file mode 100644
index 0000000..b1e0540
--- /dev/null
+++ b/tests/pipe.rs
@@ -0,0 +1,68 @@
+#[test]
+fn test_pipe_basic() {
+    use std::os::unix::io::FromRawFd as _;
+
+    let (read_fd, write_fd) = nix::unistd::pipe().unwrap();
+
+    let mut child_from = std::process::Command::new("seq");
+    child_from.args(["1", "10"]);
+    child_from.stdout(unsafe { std::process::Stdio::from_raw_fd(write_fd) });
+
+    let mut child_to = std::process::Command::new("tac");
+    child_to.stdin(unsafe { std::process::Stdio::from_raw_fd(read_fd) });
+    child_to.stdout(std::process::Stdio::piped());
+
+    assert!(child_from.status().unwrap().success());
+    nix::unistd::close(write_fd).unwrap();
+    let output = child_to.output().unwrap();
+    assert!(output.status.success());
+    assert_eq!(output.stdout, b"10\n9\n8\n7\n6\n5\n4\n3\n2\n1\n");
+}
+
+#[cfg(feature = "backend-async-std")]
+// TODO (hangs because i'm still overriding the configured fds)
+// #[test]
+fn test_pipe_async() {
+    use async_std::io::ReadExt as _;
+    use std::os::unix::io::FromRawFd as _;
+
+    let (status_from, status_to) = async_std::task::block_on(async {
+        let (read_fd, write_fd) = nix::unistd::pipe().unwrap();
+
+        let pty_from = pty_process::async_std::Pty::new().unwrap();
+        pty_from.resize(pty_process::Size::new(24, 80)).unwrap();
+        let mut cmd_from = pty_process::async_std::Command::new("seq");
+        cmd_from.args(["1", "10"]);
+        cmd_from
+            .stdout(unsafe { std::process::Stdio::from_raw_fd(write_fd) });
+        let mut child_from = cmd_from.spawn(pty_from).unwrap();
+
+        let pty_to = pty_process::async_std::Pty::new().unwrap();
+        pty_to.resize(pty_process::Size::new(24, 80)).unwrap();
+        let mut cmd_to = pty_process::async_std::Command::new("tac");
+        cmd_to.stdin(unsafe { std::process::Stdio::from_raw_fd(read_fd) });
+        let mut child_to = cmd_to.spawn(pty_to).unwrap();
+
+        // the pty will echo the written bytes back immediately, but the
+        // subprocess needs to generate its own output, which takes time, so
+        // we can't just read immediately (we may just get the echoed bytes).
+        // because the output generation is happening in the subprocess, we
+        // also don't have any way to know when (or if!) the subprocess will
+        // decide to send its output, so sleeping is the best we can do.
+        async_std::task::sleep(std::time::Duration::from_secs(1)).await;
+
+        let mut buf = [0u8; 1024];
+        let bytes = child_to.pty().read(&mut buf).await.unwrap();
+        assert_eq!(
+            &buf[..bytes],
+            b"10\r\n9\r\n8\r\n7\r\n6\r\n5\r\n4\r\n3\r\n2\r\n1\r\n"
+        );
+
+        (
+            child_from.status().await.unwrap(),
+            child_to.status().await.unwrap(),
+        )
+    });
+    assert_eq!(status_from.code().unwrap(), 0);
+    assert_eq!(status_to.code().unwrap(), 0);
+}