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cb65407 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | # Copyright cocotb contributors
# Licensed under the Revised BSD License, see LICENSE for details.
# SPDX-License-Identifier: BSD-3-Clause
import pytest
from cocotb.types import Logic
def test_logic_conversions():
l = Logic("U")
assert Logic("u") == l
assert Logic(Logic("U")) == l
l = Logic("X")
assert Logic("x") == l
assert Logic(Logic("x")) == l
l = Logic("0")
assert Logic(0) == l
assert Logic(False) == l
assert Logic(Logic("0")) == l
l = Logic("1")
assert Logic(1) == l
assert Logic(True) == l
assert Logic(Logic("1")) == l
l = Logic("Z")
assert Logic("z") == l
assert Logic(Logic("Z")) == l
l = Logic("W")
assert Logic("w") == l
assert Logic(Logic("W")) == l
l = Logic("L")
assert Logic("l") == l
assert Logic(Logic("L")) == l
l = Logic("H")
assert Logic("h") == l
assert Logic(Logic("H")) == l
l = Logic("-")
assert Logic(Logic("-")) == l
for value in ("j", 2, object()):
with pytest.raises(ValueError):
Logic(value)
def test_logic_equality():
assert Logic(0) == Logic("0")
assert Logic(0) != Logic("X")
assert Logic(0) != object()
def test_logic_default_value():
assert Logic() == Logic("X")
def test_logic_bool_conversions():
assert bool(Logic("1")) is True
assert bool(Logic("0")) is False
with pytest.raises(ValueError):
bool(Logic("X"))
with pytest.raises(ValueError):
bool(Logic("Z"))
def test_logic_str_conversions():
assert str(Logic("0")) == "0"
assert str(Logic("1")) == "1"
assert str(Logic("X")) == "X"
assert str(Logic("Z")) == "Z"
def test_logic_int_conversions():
assert int(Logic("0")) == 0
assert int(Logic("1")) == 1
with pytest.raises(ValueError):
int(Logic("X"))
with pytest.raises(ValueError):
int(Logic("Z"))
def test_logic_repr():
assert eval(repr(Logic("0"))) == Logic("0")
assert eval(repr(Logic("1"))) == Logic("1")
assert eval(repr(Logic("X"))) == Logic("X")
assert eval(repr(Logic("Z"))) == Logic("Z")
def test_logic_and():
# will not be exhaustive
assert Logic("0") & Logic("Z") == Logic(0)
assert Logic(1) & Logic("1") == Logic(1)
assert Logic("X") & Logic("Z") == Logic("X")
with pytest.raises(TypeError):
Logic("1") & 8
with pytest.raises(TypeError):
8 & Logic("1")
def test_logic_or():
# will not be exhaustive
assert Logic("1") | Logic("Z") == Logic("1")
assert Logic(0) | Logic("0") == Logic(0)
assert Logic("X") | Logic("Z") == Logic("X")
with pytest.raises(TypeError):
8 | Logic(0)
with pytest.raises(TypeError):
Logic(0) | 8
def test_logic_xor():
# will not be exhaustive
assert (Logic("1") ^ Logic(True)) == Logic(0)
assert (Logic(1) ^ Logic("X")) == Logic("X")
assert (Logic(1) ^ Logic(False)) == Logic(1)
with pytest.raises(TypeError):
Logic(1) ^ ()
with pytest.raises(TypeError):
() ^ Logic(1)
def test_logic_invert():
assert ~Logic(0) == Logic(1)
assert ~Logic(1) == Logic(0)
assert ~Logic("X") == Logic("X")
assert ~Logic("Z") == Logic("X")
def test_logic_identity():
assert Logic(0) is Logic(False)
assert Logic("1") is Logic(1)
assert Logic("X") is Logic("x")
assert Logic("z") is Logic("Z")
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