78 lines
2.3 KiB
Python
78 lines
2.3 KiB
Python
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# coding: utf-8
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import pytest
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from pandas.io.msgpack import packb, unpackb
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class DecodeError(Exception):
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pass
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class TestObj(object):
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def _arr_to_str(self, arr):
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return ''.join(str(c) for c in arr)
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def bad_complex_decoder(self, o):
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raise DecodeError("Ooops!")
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def _decode_complex(self, obj):
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if b'__complex__' in obj:
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return complex(obj[b'real'], obj[b'imag'])
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return obj
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def _encode_complex(self, obj):
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if isinstance(obj, complex):
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return {b'__complex__': True, b'real': 1, b'imag': 2}
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return obj
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def test_encode_hook(self):
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packed = packb([3, 1 + 2j], default=self._encode_complex)
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unpacked = unpackb(packed, use_list=1)
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assert unpacked[1] == {b'__complex__': True, b'real': 1, b'imag': 2}
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def test_decode_hook(self):
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packed = packb([3, {b'__complex__': True, b'real': 1, b'imag': 2}])
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unpacked = unpackb(packed, object_hook=self._decode_complex,
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use_list=1)
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assert unpacked[1] == 1 + 2j
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def test_decode_pairs_hook(self):
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packed = packb([3, {1: 2, 3: 4}])
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prod_sum = 1 * 2 + 3 * 4
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unpacked = unpackb(
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packed, object_pairs_hook=lambda l: sum(k * v for k, v in l),
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use_list=1)
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assert unpacked[1] == prod_sum
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def test_only_one_obj_hook(self):
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pytest.raises(TypeError, unpackb, b'', object_hook=lambda x: x,
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object_pairs_hook=lambda x: x)
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def test_bad_hook(self):
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def f():
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packed = packb([3, 1 + 2j], default=lambda o: o)
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unpacked = unpackb(packed, use_list=1) # noqa
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pytest.raises(TypeError, f)
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def test_array_hook(self):
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packed = packb([1, 2, 3])
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unpacked = unpackb(packed, list_hook=self._arr_to_str, use_list=1)
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assert unpacked == '123'
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def test_an_exception_in_objecthook1(self):
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def f():
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packed = packb({1: {'__complex__': True, 'real': 1, 'imag': 2}})
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unpackb(packed, object_hook=self.bad_complex_decoder)
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pytest.raises(DecodeError, f)
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def test_an_exception_in_objecthook2(self):
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def f():
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packed = packb({1: [{'__complex__': True, 'real': 1, 'imag': 2}]})
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unpackb(packed, list_hook=self.bad_complex_decoder, use_list=1)
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pytest.raises(DecodeError, f)
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