tests/extmod: Test websocket too-big packet transmission.

Signed-off-by: Jeff Epler <jepler@unpythonic.net>

1 files changed, 28 insertions, 0 deletions

diff --git a/tests/extmod/websocket_toobig.py b/tests/extmod/websocket_toobig.py
new file mode 100644
index 000000000..f4c5a74bb
--- /dev/null
+++ b/tests/extmod/websocket_toobig.py
@@ -0,0 +1,28 @@
+try:
+    import io
+    import errno
+    import websocket
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+try:
+    buf = "x" * 65536
+except MemoryError:
+    print("SKIP")
+    raise SystemExit
+
+
+# do a websocket write and then return the raw data from the stream
+def ws_write(msg, sz):
+    s = io.BytesIO()
+    ws = websocket.websocket(s)
+    ws.write(msg)
+    s.seek(0)
+    return s.read(sz)
+
+
+try:
+    print(ws_write(buf, 1))
+except OSError as e:
+    print("ioctl: ENOBUFS:", e.errno == errno.ENOBUFS)