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# Test deflate.DeflateIO compression, with out-of-memory errors.
try:
# Check if deflate is available.
import deflate
import io
except ImportError:
print("SKIP")
raise SystemExit
# Check if compression is enabled.
if not hasattr(deflate.DeflateIO, "write"):
print("SKIP")
raise SystemExit
# Create a compressor object.
b = io.BytesIO()
g = deflate.DeflateIO(b, deflate.RAW, 15)
# Then, use up most of the heap.
l = []
while True:
try:
l.append(bytearray(1000))
except:
break
l.pop()
# Try to compress. This will try to allocate a large window and fail.
try:
g.write('test')
except MemoryError:
print("MemoryError")
# Should still be able to close the stream.
g.close()
# The underlying output stream should be unchanged.
print(b.getvalue())
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