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#!/usr/bin/env python3 |
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"""Tests for the elementenum class""" |
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import unittest |
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import enum |
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from starstruct.bitfield import BitField |
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from starstruct.elementbitfield import ElementBitField |
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class SimpleEnum(enum.Enum): |
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"""Simple enum class for testing message pack/unpack""" |
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one = 1 |
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two = 2 |
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# pylint: disable=blacklisted-name |
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class StrEnum(enum.Enum): |
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"""string based enum class for testing message pack/unpack""" |
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foo = 'foo' |
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bar = 'bar' |
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# pylint: disable=line-too-long,invalid-name,no-self-use |
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class TestElementBitField(unittest.TestCase): |
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"""ElementBitField module tests""" |
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def test_invalid_enum(self): |
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"""Test field formats that are valid ElementBitField elements.""" |
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# pylint: disable=unused-variable |
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with self.assertRaises(TypeError) as cm: |
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test_bitfield = BitField(StrEnum) # noqa: F841 |
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msg = 'Enum {} members must have integer values'.format(repr(StrEnum)) |
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self.assertEqual(str(cm.exception), msg) |
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def test_not_valid(self): |
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"""Test field formats that are not valid ElementEnum elements.""" |
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test_bitfield = BitField(SimpleEnum) |
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test_fields = [ |
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('a', 'b', SimpleEnum), # enum field |
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('a', 'b', StrEnum), # enum field |
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('a', '4x', test_bitfield), # 4 pad bytes |
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('b', 'z', test_bitfield), # invalid |
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('c', '1', test_bitfield), # invalid |
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('e', '9s', test_bitfield), # invalid (no strings allowed) |
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('d', '/', test_bitfield), # invalid |
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('f', 'H'), # unsigned short (no class) |
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] |
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for field in test_fields: |
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with self.subTest(field): # pylint: disable=no-member |
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out = ElementBitField.valid(field) |
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self.assertFalse(out) |
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def test_valid_pack(self): |
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"""Test packing valid enum values.""" |
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test_bitfield = BitField(SimpleEnum) |
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field = ('a', 'b', test_bitfield) # signed byte: -128, 127 |
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out = ElementBitField.valid(field) |
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self.assertTrue(out) |
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elem = ElementBitField(field) |
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test_values = [ |
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({'a': 2}, b'\x02'), |
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({'a': []}, b'\x00'), |
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({'a': [SimpleEnum.one]}, b'\x01'), |
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({'a': [SimpleEnum.two]}, b'\x02'), |
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({'a': [SimpleEnum.one, SimpleEnum.two]}, b'\x03'), |
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({'a': [1, SimpleEnum.two]}, b'\x03'), |
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] |
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for (in_val, out_val) in test_values: |
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with self.subTest((out_val, in_val)): # pylint: disable=no-member |
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ret = elem.pack(in_val) |
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self.assertEqual(ret, out_val) |
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def test_out_of_range_values_pack(self): |
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"""Test packing invalid enum values.""" |
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test_bitfield = BitField(SimpleEnum) |
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field = ('a', 'b', test_bitfield) # signed byte: -128, 127 |
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out = ElementBitField.valid(field) |
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self.assertTrue(out) |
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elem = ElementBitField(field) |
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test_values = [ |
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({'a': 0}, 0), |
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({'a': -1}, -1), |
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({'a': [0, SimpleEnum.one]}, 0), |
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({'a': [SimpleEnum.one, -1]}, -1), |
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({'a': [SimpleEnum.two, 3]}, 3), |
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] |
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msg = '{} is not a valid {}' |
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for (in_val, bad_val) in test_values: |
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with self.subTest((in_val, bad_val)): # pylint: disable=no-member |
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with self.assertRaises(ValueError) as cm: |
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elem.pack(in_val) |
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self.assertEqual(str(cm.exception), msg.format(bad_val, 'SimpleEnum')) |
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def test_unpack(self): |
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"""Test unpacking valid enum values.""" |
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test_bitfield = BitField(SimpleEnum) |
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field = ('a', 'b', test_bitfield) # signed byte: -128, 127 |
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out = ElementBitField.valid(field) |
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self.assertTrue(out) |
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elem = ElementBitField(field) |
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test_values = [ |
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(b'\x00', frozenset([])), |
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(b'\xFC', frozenset([])), |
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(b'\x01', frozenset([SimpleEnum.one])), |
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(b'\x02', frozenset([SimpleEnum.two])), |
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(b'\x03', frozenset([SimpleEnum.one, SimpleEnum.two])), |
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(b'\xF3', frozenset([SimpleEnum.one, SimpleEnum.two])), |
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(b'\xAA', frozenset([SimpleEnum.two])), |
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] |
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for (in_val, out_val) in test_values: |
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with self.subTest((in_val, out_val)): # pylint: disable=no-member |
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(ret, unused) = elem.unpack({}, in_val) |
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self.assertEqual(unused, b'') |
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self.assertEqual(ret, out_val) |
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sprout42 /
StarStruct
