atrcopy/test/test_segment.py

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import os
import numpy as np
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import pytest
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from atrcopy import DefaultSegment, SegmentData, get_xex, interleave_segments
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def get_indexed(segment, num, scale):
indexes = np.arange(num) * scale
raw = segment.rawdata.get_indexed(indexes)
s = DefaultSegment(raw, segment.start_addr + indexes[0])
return s, indexes
class TestSegment1(object):
def setup(self):
self.segments = []
for i in range(8):
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data = np.arange(1024, dtype=np.uint8) * i
r = SegmentData(data)
self.segments.append(DefaultSegment(r, i * 1024))
def test_xex(self):
items = [
[(0, 1, 2), 0],
]
for indexes, stuff in items:
s = [self.segments[i] for i in indexes]
bytes = get_xex(s, 0xbeef)
assert tuple(bytes[0:2]) == (0xff, 0xff)
# 2 bytes for the ffff
# 6 bytes for the last segment run address
# 4 bytes per segment for start, end address
size = reduce(lambda a, b:a + 4 + len(b), s, 0)
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print size, len(bytes)
assert len(bytes) == 2 + 6 + size
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def test_copy(self):
for s in self.segments:
c = s.rawdata.copy()
print c.data.shape, c.is_indexed
print c.data.np_data, s.data.np_data
assert np.all((c.data - s.data) == 0)
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class TestIndexed(object):
def setup(self):
data = np.arange(4096, dtype=np.uint8)
data[1::2] = np.repeat(np.arange(16, dtype=np.uint8), 128)
r = SegmentData(data)
self.segment = DefaultSegment(r, 0)
def test_indexed(self):
assert not self.segment.rawdata.is_indexed
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s, indexes = get_indexed(self.segment, 1024, 3)
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assert s.rawdata.is_indexed
for i in range(len(indexes)):
assert s.get_raw_index(i) == indexes[i]
# get indexed into indexed, will result in every 9th byte
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s2, indexes2 = get_indexed(s, 256, 3)
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assert s2.rawdata.is_indexed
for i in range(len(indexes2)):
assert s2.get_raw_index(i) == indexes2[i] * 3
def test_indexed_sub(self):
base = self.segment
assert not base.rawdata.is_indexed
raw = base.rawdata[512:1536] # 1024 byte segment
sub = DefaultSegment(raw, 512)
assert not sub.rawdata.is_indexed
for i in range(len(sub)):
ri = sub.get_raw_index(i)
assert ri == sub.start_addr + i
assert sub[i] == base[ri]
start, end = sub.byte_bounds_offset()
assert start == 512
assert end == 1536
with pytest.raises(IndexError) as e:
# attempt to get indexes to 1024 * 3... Index to big => fail!
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s, indexes = get_indexed(sub, 1024, 3)
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# try with elements up to 256 * 3
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s, indexes = get_indexed(sub, 256, 3)
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print sub.data
print indexes
print s.data[:]
assert s.rawdata.is_indexed
for i in range(len(indexes)):
ri = s.get_raw_index(i)
print ri, "base[ri]=%d" % base[ri], i, indexes[i], "s[i]=%d" % s[i]
assert ri == sub.start_addr + indexes[i]
assert s[i] == base[ri]
start, end = s.byte_bounds_offset()
assert start == 0
assert end == len(base)
# get indexed into indexed, will result in every 9th byte
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s2, indexes2 = get_indexed(s, 64, 3)
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assert s2.rawdata.is_indexed
for i in range(len(indexes2)):
assert s2.get_raw_index(i) == sub.start_addr + indexes2[i] * 3
start, end = s.byte_bounds_offset()
assert start == 0
assert end == len(base)
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def test_interleave(self):
base = self.segment
r1 = base.rawdata[512:1024] # 512 byte segment
s1 = DefaultSegment(r1, 512)
r2 = base.rawdata[1024:1536] # 512 byte segment
s2 = DefaultSegment(r2, 1024)
indexes1 = r1.get_indexes_from_base()
verify1 = np.arange(512, 1024, dtype=np.uint32)
assert np.array_equal(indexes1, verify1)
indexes2 = r2.get_indexes_from_base()
verify2 = np.arange(1024, 1536, dtype=np.uint32)
assert np.array_equal(indexes2, verify2)
s = interleave_segments([s1, s2], 2)
a = np.empty(len(s1) + len(s2), dtype=np.uint8)
a[0::4] = s1[0::2]
a[1::4] = s1[1::2]
a[2::4] = s2[0::2]
a[3::4] = s2[1::2]
print list(s[:])
print list(a[:])
print s.rawdata.order
assert np.array_equal(s[:], a)
s = interleave_segments([s1, s2], 4)
a = np.empty(len(s1) + len(s2), dtype=np.uint8)
a[0::8] = s1[0::4]
a[1::8] = s1[1::4]
a[2::8] = s1[2::4]
a[3::8] = s1[3::4]
a[4::8] = s2[0::4]
a[5::8] = s2[1::4]
a[6::8] = s2[2::4]
a[7::8] = s2[3::4]
assert np.array_equal(s[:], a)
with pytest.raises(ValueError) as e:
s = interleave_segments([s1, s2], 3)
r1 = base.rawdata[512:1025] # 513 byte segment
s1 = DefaultSegment(r1, 512)
r2 = base.rawdata[1024:1537] # 513 byte segment
s2 = DefaultSegment(r2, 1024)
s = interleave_segments([s1, s2], 3)
a = np.empty(len(s1) + len(s2), dtype=np.uint8)
a[0::6] = s1[0::3]
a[1::6] = s1[1::3]
a[2::6] = s1[2::3]
a[3::6] = s2[0::3]
a[4::6] = s2[1::3]
a[5::6] = s2[2::3]
assert np.array_equal(s[:], a)
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def test_copy(self):
s, indexes = get_indexed(self.segment, 1024, 3)
c = s.rawdata.copy()
print c.data.shape, c.is_indexed
print id(c.data.np_data), id(s.data.np_data)
assert c.data.shape == s.data.shape
assert id(c) != id(s)
assert np.all((c.data[:] - s.data[:]) == 0)
c.data[0:100] = 1
assert not np.all((c.data[:] - s.data[:]) == 0)
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if __name__ == "__main__":
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t = TestIndexed()
t.setup()
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t.test_indexed()
t.test_indexed_sub()
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t.test_interleave()
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#t = TestSegment1()
#t.setup()
#t.test_xex()
t.test_copy()