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-rw-r--r--tests/io/bytesio_ext.py19
1 files changed, 19 insertions, 0 deletions
diff --git a/tests/io/bytesio_ext.py b/tests/io/bytesio_ext.py
new file mode 100644
index 0000000000..30d79fcfcd
--- /dev/null
+++ b/tests/io/bytesio_ext.py
@@ -0,0 +1,19 @@
+# Extended stream operations on io.BytesIO
+try:
+ import uio as io
+except ImportError:
+ import io
+
+a = io.BytesIO()
+print(a.seek(8))
+a.write(b"123")
+print(a.getvalue())
+
+print(a.seek(0, 1))
+
+print(a.seek(-1, 2))
+a.write(b"0")
+print(a.getvalue())
+
+a.flush()
+print(a.getvalue())