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import io
import os
import numpy as np
import pytest
from numpy.testing import assert_array_equal
import asdf
from asdf import Stream, generic_io
def test_stream():
buff = io.BytesIO()
tree = {"stream": Stream([6, 2], np.float64)}
ff = asdf.AsdfFile(tree)
ff.write_to(buff)
for i in range(100):
buff.write(np.array([i] * 12, np.float64).tobytes())
buff.seek(0)
with asdf.open(buff) as ff:
assert len(ff._blocks.blocks) == 1
assert ff.tree["stream"].shape == (100, 6, 2)
for i, row in enumerate(ff.tree["stream"]):
assert np.all(row == i)
def test_stream_write_nothing():
"""
Test that if you write nothing, you get a zero-length array
"""
buff = io.BytesIO()
tree = {"stream": Stream([6, 2], np.float64)}
ff = asdf.AsdfFile(tree)
ff.write_to(buff)
buff.seek(0)
with asdf.open(buff) as ff:
assert len(ff._blocks.blocks) == 1
assert ff.tree["stream"].shape == (0, 6, 2)
def test_stream_twice():
"""
Test that if you write nothing, you get a zero-length array
"""
buff = io.BytesIO()
tree = {"stream": Stream([6, 2], np.uint8), "stream2": Stream([12, 2], np.uint8)}
ff = asdf.AsdfFile(tree)
ff.write_to(buff)
for i in range(100):
buff.write(np.array([i] * 12, np.uint8).tobytes())
buff.seek(0)
ff = asdf.open(buff)
assert len(ff._blocks.blocks) == 1
assert ff.tree["stream"].shape == (100, 6, 2)
assert ff.tree["stream2"].shape == (50, 12, 2)
def test_stream_with_nonstream():
buff = io.BytesIO()
tree = {"nonstream": np.array([1, 2, 3, 4], np.int64), "stream": Stream([6, 2], np.float64)}
ff = asdf.AsdfFile(tree)
# Since we're testing with small arrays, force this array to be stored in
# an internal block rather than letting it be automatically put inline.
ff.set_array_storage(ff["nonstream"], "internal")
ff.write_to(buff)
for i in range(100):
buff.write(np.array([i] * 12, np.float64).tobytes())
buff.seek(0)
with asdf.open(buff) as ff:
assert len(ff._blocks.blocks) == 2
assert_array_equal(ff.tree["nonstream"], np.array([1, 2, 3, 4], np.int64))
assert ff.tree["stream"].shape == (100, 6, 2)
for i, row in enumerate(ff.tree["stream"]):
assert np.all(row == i)
def test_stream_real_file(tmp_path):
path = os.path.join(str(tmp_path), "test.asdf")
tree = {"nonstream": np.array([1, 2, 3, 4], np.int64), "stream": Stream([6, 2], np.float64)}
with open(path, "wb") as fd:
ff = asdf.AsdfFile(tree)
# Since we're testing with small arrays, force this array to be stored
# in an internal block rather than letting it be automatically put
# inline.
ff.set_array_storage(ff["nonstream"], "internal")
ff.write_to(fd)
for i in range(100):
fd.write(np.array([i] * 12, np.float64).tobytes())
with asdf.open(path) as ff:
assert len(ff._blocks.blocks) == 2
assert_array_equal(ff.tree["nonstream"], np.array([1, 2, 3, 4], np.int64))
assert ff.tree["stream"].shape == (100, 6, 2)
for i, row in enumerate(ff.tree["stream"]):
assert np.all(row == i)
def test_stream_to_stream():
tree = {"nonstream": np.array([1, 2, 3, 4], np.int64), "stream": Stream([6, 2], np.float64)}
buff = io.BytesIO()
fd = generic_io.OutputStream(buff)
ff = asdf.AsdfFile(tree)
ff.write_to(fd)
for i in range(100):
fd.write(np.array([i] * 12, np.float64).tobytes())
buff.seek(0)
with asdf.open(generic_io.InputStream(buff, "r")) as ff:
assert len(ff._blocks.blocks) == 2
assert_array_equal(ff.tree["nonstream"], np.array([1, 2, 3, 4], np.int64))
assert ff.tree["stream"].shape == (100, 6, 2)
for i, row in enumerate(ff.tree["stream"]):
assert np.all(row == i)
def test_array_to_stream(tmp_path):
tree = {
"stream": np.array([1, 2, 3, 4], np.int64),
}
buff = io.BytesIO()
ff = asdf.AsdfFile(tree)
ff.set_array_storage(tree["stream"], "streamed")
ff.write_to(buff)
buff.write(np.array([5, 6, 7, 8], np.int64).tobytes())
buff.seek(0)
ff = asdf.open(generic_io.InputStream(buff))
assert_array_equal(ff.tree["stream"], [1, 2, 3, 4, 5, 6, 7, 8])
buff.seek(0)
ff2 = asdf.AsdfFile(ff)
ff2.set_array_storage(ff2["stream"], "streamed")
ff2.write_to(buff)
assert b"shape: ['*']" in buff.getvalue()
with open(os.path.join(str(tmp_path), "test.asdf"), "wb") as fd:
ff = asdf.AsdfFile(tree)
ff.set_array_storage(tree["stream"], "streamed")
ff.write_to(fd)
fd.write(np.array([5, 6, 7, 8], np.int64).tobytes())
with asdf.open(os.path.join(str(tmp_path), "test.asdf")) as ff:
assert_array_equal(ff.tree["stream"], [1, 2, 3, 4, 5, 6, 7, 8])
ff2 = asdf.AsdfFile(ff)
ff2.write_to(buff)
assert b"shape: ['*']" in buff.getvalue()
def test_too_many_streams():
tree = {"stream1": np.array([1, 2, 3, 4], np.int64), "stream2": np.array([1, 2, 3, 4], np.int64)}
ff = asdf.AsdfFile(tree)
ff.set_array_storage(tree["stream1"], "streamed")
with pytest.raises(ValueError, match=r"Can not add second streaming block"):
ff.set_array_storage(tree["stream2"], "streamed")
def test_stream_repr_and_str():
tree = {"stream": Stream([16], np.int64)}
ff = asdf.AsdfFile(tree)
repr(ff.tree["stream"])
str(ff.tree["stream"])
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