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binman: Complete test coverage of comp_util

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Drop the unused gzip code, update comments and add a test for an
invalid algorithm. The temporary file is not needed now, so drop that
also.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2022-01-09 20:14:10 -07:00
parent 4f9ee83ba9
commit a00d9713e4
2 changed files with 11 additions and 14 deletions
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16
tools/binman/comp_util.py
View file

@ -25,28 +25,20 @@ def compress(indata, algo, with_header=True):
This requires 'lz4' and 'lzma_alone' tools. It also requires an output
directory to be previously set up, by calling PrepareOutputDir().
Care is taken to use unique temporary files so that this function can be
called from multiple threads.
Args:
indata (bytes): Input data to compress
algo (str): Algorithm to use ('none', 'gzip', 'lz4' or 'lzma')
algo (str): Algorithm to use ('none', 'lz4' or 'lzma')
Returns:
bytes: Compressed data
"""
if algo == 'none':
return indata
fname = tempfile.NamedTemporaryFile(prefix='%s.comp.tmp' % algo,
dir=tools.GetOutputDir()).name
tools.WriteFile(fname, indata)
if algo == 'lz4':
data = LZ4.compress(indata)
# cbfstool uses a very old version of lzma
elif algo == 'lzma':
data = LZMA_ALONE.compress(indata)
elif algo == 'gzip':
data = tools.Run('gzip', '-c', fname, binary=True)
else:
raise ValueError("Unknown algorithm '%s'" % algo)
if with_header:
@ -65,7 +57,7 @@ def decompress(indata, algo, with_header=True):
Args:
indata (bytes): Input data to decompress
algo (str): Algorithm to use ('none', 'gzip', 'lz4' or 'lzma')
algo (str): Algorithm to use ('none', 'lz4' or 'lzma')
Returns:
(bytes) Compressed data
@ -75,14 +67,10 @@ def decompress(indata, algo, with_header=True):
if with_header:
data_len = struct.unpack('<I', indata[:4])[0]
indata = indata[4:4 + data_len]
fname = tools.GetOutputFilename('%s.decomp.tmp' % algo)
tools.WriteFile(fname, indata)
if algo == 'lz4':
data = LZ4.decompress(indata)
elif algo == 'lzma':
data = LZMA_ALONE.decompress(indata)
elif algo == 'gzip':
data = tools.Run('gzip', '-cd', fname, binary=True)
else:
raise ValueError("Unknown algorithm '%s'" % algo)
return data

9
tools/binman/ftest.py
View file

@ -5076,6 +5076,15 @@ fdt fdtmap Extract the devicetree blob from the fdtmap
self._DoBinman(*args)
self.assertIn('failed to fetch with all methods', stdout.getvalue())
def testInvalidCompress(self):
with self.assertRaises(ValueError) as e:
comp_util.compress(b'', 'invalid')
self.assertIn("Unknown algorithm 'invalid'", str(e.exception))
with self.assertRaises(ValueError) as e:
comp_util.decompress(b'1234', 'invalid')
self.assertIn("Unknown algorithm 'invalid'", str(e.exception))
if __name__ == "__main__":
unittest.main()