def test_AlignHorizontal_nblock_checking(solver):
x = constraint.AlignHorizontal(blocks=[], alignment='top')
with pytest.raises(AssertionError):
x.check()
x = constraint.AlignHorizontal(blocks=['M1'], alignment='top')
with pytest.raises(AssertionError):
x.check()
def test_ConstraintDB_incremental_checking(db):
'''
ConstraintDB can be used to run experiments
using checkpoint() and revert() methods. There
is an overhead so use sparingly
'''
# Experiment 1 : Success
db.append(constraint.AlignHorizontal(blocks=['M1', 'M2', 'M3']))
db.checkpoint()
# Experiment 2 : Failure
with pytest.raises(AssertionError):
db.append(
constraint.AlignHorizontal(blocks=['M3', 'M2'],
alignment='bottom'))
db.revert()
# Experiment 3 : Success
db.append(
constraint.AlignHorizontal(blocks=['M4', 'M5'], alignment='bottom'))
db.checkpoint()
# Experiment 4: Failure
with pytest.raises(AssertionError):
db.append(
constraint.AlignHorizontal(blocks=['M3', 'M2'],
alignment='bottom'))
db.revert()
# Experiment 5: Success
db.append(constraint.AlignHorizontal(blocks=['M2', 'M5']))
def test_ConstraintDB_checking(db):
db.append(constraint.AlignHorizontal(blocks=['M1', 'M2', 'M3']))
db.append(
constraint.AlignHorizontal(blocks=['M4', 'M5'], alignment='bottom'))
with pytest.raises(AssertionError):
db.append(
constraint.AlignHorizontal(blocks=['M3', 'M2'],
alignment='bottom'))
def test_ConstraintDB_permissive():
'''
Check that it is possible to turn validation OFF
NOT RECOMMENDED !! DO NOT DO THIS !!!
'''
db = constraint.ConstraintDB(validation=False)
db.append(constraint.AlignHorizontal(blocks=['M1', 'M2']))
db.append(constraint.AlignHorizontal(blocks=['M2', 'M1']))
def test_AlignHorizontal_order_checking(solver):
'''
This is just a unittest of generated constraints
Please use ConstraintDB to manage constraints
(See test_ConstraintDB_checking() for example)
'''
x = constraint.AlignHorizontal(blocks=['M1', 'M2', 'M3'])
solver.append(*x.check())
assert solver.check() == z3.sat
x = constraint.AlignHorizontal(blocks=['M4', 'M5'], alignment='bottom')
solver.append(*x.check())
assert solver.check() == z3.sat
x = constraint.AlignHorizontal(blocks=['M3', 'M2'], alignment='bottom')
solver.append(*x.check())
with pytest.raises(AssertionError):
assert solver.check() == z3.sat
def test_ConstraintDB_nonincremental_revert(db):
'''
While it is possible to revert() back to a certain
checkpoint() by name, needing to unroll multiple
checkpoints can indicate suboptimal compiler design
'''
db.append(constraint.AlignHorizontal(blocks=['M1', 'M2']))
idx = db.checkpoint()
db.append(constraint.AlignHorizontal(blocks=['M1', 'M3']))
db.checkpoint()
db.append(constraint.AlignHorizontal(blocks=['M2', 'M3']))
db.checkpoint()
db.revert(idx)
assert len(db) == 1
assert len(db._commits) == 0
if db._validation:
assert 'M3' not in str(db._solver)
def test_AlignHorizontal_input_sanitation(solver):
x = constraint.AlignHorizontal(blocks=['M1', 'M2'], alignment='top')
x = constraint.AlignHorizontal(blocks=['M1', 'M2', 'M3'], alignment='top')
with pytest.raises(Exception):
x = constraint.AlignHorizontal(blocks=['M1', 'M2', 'M3'],
alignment='garbage')