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import unittest
from petsc4py import PETSc
# --------------------------------------------------------------------
def allclose(seq1, seq2):
for v1, v2 in zip(seq1, seq2):
if abs(v1 - v2) > 1e-5:
return False
return True
class TestNullSpace(unittest.TestCase):
def setUp(self):
u1 = PETSc.Vec().createSeq(3)
u2 = PETSc.Vec().createSeq(3)
u1[0], u1[1], u1[2] = [1, 2, 0]
u1.normalize()
u2[0], u2[1], u2[2] = [2, -1, 0]
u2.normalize()
basis = [u1, u2]
nullsp = PETSc.NullSpace().create(False, basis, comm=PETSc.COMM_SELF)
self.basis = basis
self.nullsp = nullsp
def tearDown(self):
self.basis = None
self.nullsp = None
PETSc.garbage_cleanup()
def _remove(self):
v = PETSc.Vec().createSeq(3)
v[0], v[1], v[2] = [7, 8, 9]
w = v.copy()
self.nullsp.remove(w)
return (v, w)
def testRemove(self):
v, w = self._remove()
self.assertTrue(allclose(v.array, [7, 8, 9]))
self.assertTrue(allclose(w.array, [0, 0, 9]))
del v, w
def testRemoveInplace(self):
v, w = self._remove()
self.nullsp.remove(v)
self.assertTrue(v.equal(w))
del v, w
def testRemoveWithFunction(self):
def myremove(nsp, vec):
vec.setArray([1, 2, 3])
self.nullsp.setFunction(myremove)
v, w = self._remove()
self.assertTrue(allclose(v.array, [7, 8, 9]))
self.assertTrue(allclose(w.array, [1, 2, 3]))
self.nullsp.remove(v)
self.assertTrue(allclose(v.array, [1, 2, 3]))
self.nullsp.setFunction(None)
self.testRemove()
def testGetSetFunction(self):
def rem(nsp, vec):
vec.set(0)
self.nullsp.setFunction(rem)
dct = self.nullsp.getDict()
self.assertTrue(dct is not None)
fun, a, kw = dct['__function__']
self.assertTrue(fun is rem)
self.nullsp.setFunction(None)
fun = dct.get('__function__')
self.assertTrue(fun is None)
# --------------------------------------------------------------------
if __name__ == '__main__':
unittest.main()
# --------------------------------------------------------------------
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