3 files changed, 94 insertions, 0 deletions
diff --git a/vendor/tokio/tests/support/io_vec.rs b/vendor/tokio/tests/support/io_vec.rs
new file mode 100644
index 000000000..4ea47c748
--- /dev/null
+++ b/vendor/tokio/tests/support/io_vec.rs
@@ -0,0 +1,45 @@
+use std::io::IoSlice;
+use std::ops::Deref;
+use std::slice;
+
+pub struct IoBufs<'a, 'b>(&'b mut [IoSlice<'a>]);
+
+impl<'a, 'b> IoBufs<'a, 'b> {
+    pub fn new(slices: &'b mut [IoSlice<'a>]) -> Self {
+        IoBufs(slices)
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.0.is_empty()
+    }
+
+    pub fn advance(mut self, n: usize) -> IoBufs<'a, 'b> {
+        let mut to_remove = 0;
+        let mut remaining_len = n;
+        for slice in self.0.iter() {
+            if remaining_len < slice.len() {
+                break;
+            } else {
+                remaining_len -= slice.len();
+                to_remove += 1;
+            }
+        }
+        self.0 = self.0.split_at_mut(to_remove).1;
+        if let Some(slice) = self.0.first_mut() {
+            let tail = &slice[remaining_len..];
+            // Safety: recasts slice to the original lifetime
+            let tail = unsafe { slice::from_raw_parts(tail.as_ptr(), tail.len()) };
+            *slice = IoSlice::new(tail);
+        } else if remaining_len != 0 {
+            panic!("advance past the end of the slice vector");
+        }
+        self
+    }
+}
+
+impl<'a, 'b> Deref for IoBufs<'a, 'b> {
+    type Target = [IoSlice<'a>];
+    fn deref(&self) -> &[IoSlice<'a>] {
+        self.0
+    }
+}
diff --git a/vendor/tokio/tests/support/mpsc_stream.rs b/vendor/tokio/tests/support/mpsc_stream.rs
new file mode 100644
index 000000000..aa385a39d
--- /dev/null
+++ b/vendor/tokio/tests/support/mpsc_stream.rs
@@ -0,0 +1,42 @@
+#![allow(dead_code)]
+
+use std::pin::Pin;
+use std::task::{Context, Poll};
+use tokio::sync::mpsc::{self, Receiver, Sender, UnboundedReceiver, UnboundedSender};
+use tokio_stream::Stream;
+
+struct UnboundedStream<T> {
+    recv: UnboundedReceiver<T>,
+}
+impl<T> Stream for UnboundedStream<T> {
+    type Item = T;
+    fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<T>> {
+        Pin::into_inner(self).recv.poll_recv(cx)
+    }
+}
+
+pub fn unbounded_channel_stream<T: Unpin>() -> (UnboundedSender<T>, impl Stream<Item = T>) {
+    let (tx, rx) = mpsc::unbounded_channel();
+
+    let stream = UnboundedStream { recv: rx };
+
+    (tx, stream)
+}
+
+struct BoundedStream<T> {
+    recv: Receiver<T>,
+}
+impl<T> Stream for BoundedStream<T> {
+    type Item = T;
+    fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<T>> {
+        Pin::into_inner(self).recv.poll_recv(cx)
+    }
+}
+
+pub fn channel_stream<T: Unpin>(size: usize) -> (Sender<T>, impl Stream<Item = T>) {
+    let (tx, rx) = mpsc::channel(size);
+
+    let stream = BoundedStream { recv: rx };
+
+    (tx, stream)
+}
diff --git a/vendor/tokio/tests/support/signal.rs b/vendor/tokio/tests/support/signal.rs
new file mode 100644
index 000000000..ea0605876
--- /dev/null
+++ b/vendor/tokio/tests/support/signal.rs
@@ -0,0 +1,7 @@
+pub fn send_signal(signal: libc::c_int) {
+    use libc::{getpid, kill};
+
+    unsafe {
+        assert_eq!(kill(getpid(), signal), 0);
+    }
+}