Fix handling of deferred write errors that happen when closing

1 files changed, 31 insertions, 0 deletions

diff --git a/test/test_deferred_write_error.py b/test/test_deferred_write_error.py
new file mode 100644
index 00000000..4005d570
--- /dev/null
+++ b/test/test_deferred_write_error.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+
+"""Test errors that only really happen when the output file is closed."""
+
+import argparse
+import sys
+import shlex
+import subprocess
+import os
+
+parser = argparse.ArgumentParser(description=__doc__)
+
+parser.add_argument("--tool", default="tools/serd-pipe", help="executable")
+parser.add_argument("--wrapper", default="", help="executable wrapper")
+parser.add_argument("input", help="valid input file")
+
+args = parser.parse_args(sys.argv[1:])
+command = shlex.split(args.wrapper) + [args.tool, '-b', '1024', args.input]
+
+if os.path.exists("/dev/full"):
+
+    with open("/dev/full", "w") as out:
+        proc = subprocess.run(
+            command, check=False, stdout=out, stderr=subprocess.PIPE
+        )
+
+    assert proc.returncode != 0
+    assert "error" in proc.stderr.decode("utf-8")
+
+else:
+    sys.stderr.write("warning: /dev/full not present, skipping test")