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from chrysacase import ChrysalideTestCase
from pychrysalide.common import BitField
class TestBitFields(ChrysalideTestCase):
"""TestCase for common.BitField*"""
def testDuplicateBitField(self):
"""Check duplicated bitfield value."""
bf = BitField(10, 0)
bf2 = bf.dup()
self.assertEqual(bf, bf2)
self.assertEqual(bf.size, bf2.size)
self.assertEqual(bf.popcount, bf2.popcount)
def testBitFieldValues(self):
"""Evaluate bitfields basic values."""
bf_a = BitField(75, 1)
bf_b = BitField(75, 0)
self.assertNotEqual(bf_a, bf_b)
bf_a = BitField(75, 1)
bf_b = BitField(75, 0)
bf_b.set_all()
self.assertEqual(bf_a, bf_b)
self.assertEqual(bf_a.popcount, bf_b.popcount)
bf_a = BitField(75, 1)
bf_a.reset_all()
bf_b = BitField(75, 0)
self.assertEqual(bf_a, bf_b)
self.assertEqual(bf_a.popcount, bf_b.popcount)
def testBitFieldLogicalOperations(self):
"""Perform logical operations on bitfields."""
bf_a = BitField(75, 1)
bf_b = BitField(75, 0)
self.assertEqual(bf_a.size, bf_b.size)
bf_f = bf_a & bf_b
self.assertEqual(bf_f, bf_b)
self.assertEqual(bf_f.popcount, bf_b.popcount)
bf_f = bf_a | bf_b
self.assertEqual(bf_f, bf_a)
self.assertEqual(bf_f.popcount, bf_a.popcount)
def testBitFieldSwitch(self):
"""Switch various bits in bitfields."""
bf_1 = BitField(75, 1)
bf_0 = BitField(75, 0)
bf_t = BitField(75, 0)
for i in range(75):
bf_t.set(i, 1)
self.assertEqual(bf_t, bf_1)
self.assertEqual(bf_t.popcount, bf_1.popcount)
for i in range(75):
bf_t.reset(i, 1)
self.assertEqual(bf_t, bf_0)
self.assertEqual(bf_t.popcount, bf_0.popcount)
def testBitFieldBits(self):
"""Test bits in bitfields."""
bf = BitField(54, 1)
self.assertTrue(bf.test(0))
self.assertTrue(bf.test(53))
self.assertTrue(bf.test_all(0, 54))
self.assertFalse(bf.test_none(0, 54))
bf = BitField(54, 0)
self.assertFalse(bf.test(0))
self.assertFalse(bf.test(53))
self.assertFalse(bf.test_all(0, 54))
self.assertTrue(bf.test_none(0, 54))
def testPopCountForBitField(self):
"""Count bits set to 1 in bitfield."""
bf = BitField(65, 1)
self.assertEqual(bf.size, 65)
self.assertEqual(bf.popcount, 65)
def testBitFieldComparison(self):
"""Check bitfield comparison."""
bf_a = BitField(9, 0)
bf_a.set(0, 1)
bf_a.set(5, 1)
bf_b = BitField(9, 1)
self.assertNotEqual(bf_a, bf_b)
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