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105 lines
2.6 KiB
Python
105 lines
2.6 KiB
Python
#!/usr/bin/env python
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# coding: utf-8
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from array import array
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from msgpack import packb, unpackb
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import sys
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# For Python < 3:
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# - array type only supports old buffer interface
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# - array.frombytes is not available, must use deprecated array.fromstring
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if sys.version_info[0] < 3:
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def make_memoryview(obj):
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return memoryview(buffer(obj))
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def make_array(f, data):
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a = array(f)
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a.fromstring(data)
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return a
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def get_data(a):
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return a.tostring()
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else:
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make_memoryview = memoryview
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def make_array(f, data):
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a = array(f)
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a.frombytes(data)
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return a
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def get_data(a):
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return a.tobytes()
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def __run_test(format, nbytes, expected_header, expected_prefix, use_bin_type):
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# create a new array
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original_array = array(format)
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original_array.fromlist([255] * (nbytes // original_array.itemsize))
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original_data = get_data(original_array)
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view = make_memoryview(original_array)
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# pack, unpack, and reconstruct array
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packed = packb(view, use_bin_type=use_bin_type)
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unpacked = unpackb(packed)
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reconstructed_array = make_array(format, unpacked)
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# check that we got the right amount of data
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assert len(original_data) == nbytes
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# check packed header
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assert packed[:1] == expected_header
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# check packed length prefix, if any
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assert packed[1:1+len(expected_prefix)] == expected_prefix
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# check packed data
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assert packed[1+len(expected_prefix):] == original_data
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# check array unpacked correctly
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assert original_array == reconstructed_array
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def test_fixstr_from_byte():
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__run_test('B', 31, b'\xbf', b'', False)
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def test_fixstr_from_float():
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__run_test('f', 28, b'\xbc', b'', False)
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def test_str16_from_byte():
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__run_test('B', 2**8, b'\xda', b'\x01\x00', False)
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def test_str16_from_float():
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__run_test('f', 2**8, b'\xda', b'\x01\x00', False)
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def test_str32_from_byte():
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__run_test('B', 2**16, b'\xdb', b'\x00\x01\x00\x00', False)
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def test_str32_from_float():
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__run_test('f', 2**16, b'\xdb', b'\x00\x01\x00\x00', False)
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def test_bin8_from_byte():
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__run_test('B', 1, b'\xc4', b'\x01', True)
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def test_bin8_from_float():
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__run_test('f', 4, b'\xc4', b'\x04', True)
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def test_bin16_from_byte():
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__run_test('B', 2**8, b'\xc5', b'\x01\x00', True)
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def test_bin16_from_float():
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__run_test('f', 2**8, b'\xc5', b'\x01\x00', True)
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def test_bin32_from_byte():
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__run_test('B', 2**16, b'\xc6', b'\x00\x01\x00\x00', True)
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def test_bin32_from_float():
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__run_test('f', 2**16, b'\xc6', b'\x00\x01\x00\x00', True)
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