def test_namespacewriter_simple(): f = Frame() f.addfield("Y", 1.) f.addgroup("A") f.A.addfield("B", 0.) def dYdx(f, x, Y): return -Y f.Y.differentiator = dYdx f.addintegrationvariable("x", 0.) def dx(f): return 1. f.x.updater = dx f.x.snapshots = [1.] f.integrator = Integrator(f.x) f.integrator.instructions = [Instruction(schemes.expl_1_euler, f.Y)] f.writer = writers.namespacewriter() f.writer.dumping = True f.run() Y = f.writer.read.sequence("Y") assert np.all(Y == [1., 0.]) x = f.writer.read.sequence("x") assert np.all(x == [0., 1.]) data = f.writer.read.all() assert np.all(data.Y == [1., 0.]) assert np.all(data.x == [0., 1.]) f.writer.reset()
def test_field_derivative(): f = Frame() f.addfield("Y", 1.) f.addintegrationvariable("x", 0.) def diff(f, x, Y): return -Y f.Y.differentiator = diff with pytest.raises(RuntimeError): f.Y.derivative() f.integrator = Integrator(f.x) f.integrator._var = None with pytest.raises(RuntimeError): f.Y.derivative() f.integrator = Integrator(f.x) assert np.all(f.Y.derivative() == -f.Y) f.addfield("Y", [1., 0]) assert np.all(f.Y.derivative() == 0.) def jac(f, x): return [[2., 0], [0., 2.]] f.Y.jacobinator = jac assert np.all(f.Y.derivative() == [2., 0.])
def test_expl_3_gottlieb_shu_adptv(): f = Frame() f.addfield("Y", 1.) def dYdx(f, x, Y): return -Y f.Y.differentiator = dYdx f.addintegrationvariable("x", 0.) def dx(f): return f.x.suggested f.x.updater = dx f.x.snapshots = [10.] f.x.suggest(0.1) f.integrator = Integrator(f.x) f.integrator.instructions = [ Instruction(schemes.expl_3_gottlieb_shu_adptv, f.Y, controller={"eps": 1.e-4}) ] f.run() assert np.allclose(f.Y, 4.5390485375346277e-05)
def test_expl_5_dormand_prince_adptv(): f = Frame() f.addfield("Y", 1.) def dYdx(f, x, Y): return -Y f.Y.differentiator = dYdx f.addintegrationvariable("x", 0.) def dx(f): return f.x.suggested f.x.updater = dx f.x.snapshots = [10.] f.x.suggest(0.1) f.integrator = Integrator(f.x) f.integrator.instructions = [ Instruction(schemes.expl_5_dormand_prince_adptv, f.Y, controller={"eps": 1.e-2}) ] f.run() assert np.allclose(f.Y, 1.8016162079480785e-06)
def test_expl_5_cash_karp_adptv(): f = Frame() f.addfield("Y", 1.) def dYdx(f, x, Y): return -Y f.Y.differentiator = dYdx f.addintegrationvariable("x", 0.) def dx(f): return f.x.suggested f.x.updater = dx f.x.snapshots = [10.] f.x.suggest(0.1) f.integrator = Integrator(f.x) f.integrator.instructions = [ Instruction(schemes.expl_5_cash_karp_adptv, f.Y, controller={"eps": 1.e-3}) ] f.run() assert np.allclose(f.Y, 4.57114092616805e-05)
def test_impl_1_euler_gmres_fail(): f = Frame() f.addfield("Y", 1.) def jac(f, x): return np.array([-1.]) f.Y.jacobinator = jac f.addintegrationvariable("x", 0.) def dx(f): return 0.1 f.x.updater = dx f.x.snapshots = [10.] f.integrator = Integrator(f.x) f.integrator.instructions = [ Instruction(schemes.impl_1_euler_gmres, f.Y, controller={ "gmres_opt": { "atol": 0., "tol": 1.e-18, "maxiter": 1 } }) ] with pytest.raises(StopIteration): f.run()
def test_expl_2_heun_euler_adaptive(): f = Frame() f.addfield("Y", 1.) def dYdx(f, x, Y): return -Y f.Y.differentiator = dYdx f.addintegrationvariable("x", 0.) def dx(f): return f.x.suggested f.x.updater = dx f.x.snapshots = [10.] f.x.suggest(0.1) f.integrator = Integrator(f.x) f.integrator.instructions = [ Instruction(schemes.expl_2_heun_euler_adptv, f.Y, controller={"eps": 1.e-3}) ] f.run() assert np.allclose(f.Y, 4.553150014598088e-05)
def test_hdf5writer_dict(): f = Frame() f.n = {1: 1} f.writer = writers.hdf5writer() with pytest.raises(NotImplementedError): f.writeoutput(0) shutil.rmtree(f.writer.datadir)
def test_frame_run(): f = Frame() f.verbosity = 0 f.addintegrationvariable("x", 0.) with pytest.raises(RuntimeError): f.run() f.integrator = Integrator(f.x) f.integrator._var = None with pytest.raises(RuntimeError): f.run() f.integrator = Integrator(f.x) with pytest.raises(RuntimeError): f.run() f.x = 3. f.x.snapshots = [1., 2.] with pytest.raises(RuntimeError): f.run() def dx(f): return 0.1 f.x.updater = dx f.x = 1.5 f.run() assert np.all(f.x == 2.)
def test_group_updateorder(): f = Frame() f.addfield("x", 1.) f.addfield("y", 2.) with pytest.raises(RuntimeError): f.updateorder = ["x", "y"] assert f.updateorder == None with pytest.raises(ValueError): f.updater = ["x", None] with pytest.raises(RuntimeError): f.updater = ["x", "z"] f.updater = ["y", "x"] assert f.updateorder == ["y", "x"] def upd_x(f): return f.x * f.y def upd_y(f): return f.x + f.y f.x.updater = upd_x f.y.updater = upd_y f.update() assert f.x == 3. assert f.y == 3. def upd(f): f.y.update() f.x.update() f.updater = Heartbeat(upd) f.update() assert f.x == 18. assert f.y == 6.
def test_field_set(): f = Frame() f.addfield("Y", 0.) f.Y._setvalue(1.) assert f.Y == 1. f.Y.constant = True with pytest.raises(RuntimeError): f.Y._setvalue(0.)
def test_field_repr_str(): f = Frame() fi = Field(f, [0., 0.]) assert isinstance(repr(fi), str) assert isinstance(str(fi), str) fi = Field(f, 0., constant=True) assert isinstance(repr(fi), str) assert isinstance(str(fi), str)
def test_namespacewriter_read_empty(): f = Frame() f.addfield("Y", 1.) f.writer = writers.namespacewriter() with pytest.raises(RuntimeError): Y = f.writer.read.sequence("Y") with pytest.raises(RuntimeError): data = f.writer.read.all()
def test_hdf5writer_skip(): f = Frame() f.writer = writers.hdf5writer() f.addfield("x", 0., save=False) f.writeoutput(0) with pytest.raises(KeyError): x = f.writer.read.sequence("x") shutil.rmtree(f.writer.datadir)
def test_instruction_wrong_step_factor(): f = Frame() fi = Field(f, 0.) with pytest.raises(TypeError): i = Instruction(schemes.expl_1_euler, fi, fstep=None) with pytest.raises(ValueError): i = Instruction(schemes.expl_1_euler, fi, fstep=0.) with pytest.raises(ValueError): i = Instruction(schemes.expl_1_euler, fi, fstep=1.1)
def test_field_attributes(): f = Frame() fi = Field(f, 1.) with pytest.raises(TypeError): fi.constant = "_" with pytest.raises(TypeError): fi.save = "_" with pytest.raises(RuntimeError): fi.buffer = None
def test_intvar_update(): f = Frame() intv = IntVar(f, 1.) def dx(f): return 1. intv.updater = dx assert intv.update() == None assert intv == 1.
def test_field_update(): f = Frame() f.addfield("Y", 1.) def upd(f): return 0. f.Y.updater = upd f.Y.update() assert f.Y == 0.
def test_frame_attributes(): f = Frame() with pytest.raises(TypeError): f.integrator = 1 with pytest.raises(TypeError): f.progressbar = 1 f.progressbar = Progressbar() with pytest.raises(TypeError): f.verbosity = "_" with pytest.raises(TypeError): f.writer = "_"
def test_namespacewriter_read_out_of_bounds(): f = Frame() f.addfield("Y", 1.) f.writer = writers.namespacewriter() f.writer.verbosity = 0 f.writer.dumping = False f.writer.write(f) with pytest.raises(RuntimeError): f.writer.read.output(1) data0000 = f.writer.read.output(0) assert data0000.Y == 1. f.writer.reset()
def test_hdf5writer_single_value_array(): f = Frame() f.n = np.array(1) f.writer = writers.hdf5writer() f.writeoutput(0) f.writeoutput(1) data0000 = f.writer.read.output(0) assert data0000.n == 1 n = f.writer.read.sequence("n") assert np.all(n == [1, 1]) data = f.writer.read.all() assert np.all(data.n == [1, 1]) shutil.rmtree(f.writer.datadir)
def test_hdf5writer_list(): f = Frame() f.n = [1, 1] f.writer = writers.hdf5writer() f.writeoutput(0) f.writeoutput(1) data0000 = f.writer.read.output(0) assert np.all(data0000.n == [1, 1]) n = f.writer.read.sequence("n") assert np.all(n == [[1, 1], [1, 1]]) data = f.writer.read.all() assert np.all(data.n == [[1, 1], [1, 1]]) shutil.rmtree(f.writer.datadir)
def test_hdf5writer_none(): f = Frame() f.n = None f.writer = writers.hdf5writer() with pytest.raises(ValueError): f.writeoutput(0) f.n = [1, None] with pytest.raises(ValueError): f.writeoutput(1) f.n = (1, None) with pytest.raises(ValueError): f.writeoutput(2) shutil.rmtree(f.writer.datadir)
def test_namespacewriter_read_sequence(): f = Frame() f.addfield("Y", [1., 0]) f.addfield("x", 0, save=False) f.writer = writers.namespacewriter() f.writer.write(f) with pytest.raises(TypeError): f.writer.read.sequence(1) with pytest.raises(RuntimeError): f.writer.read.sequence("x") Y = f.writer.read.sequence("Y") assert np.all(Y == [1., 0.]) f.writer.reset()
def test_intvar_suggest(): f = Frame() intv = IntVar(f, 0.) with pytest.raises(RuntimeError): intv.suggested with pytest.raises(ValueError): intv.suggest(-1.) intv.suggest(1.) assert intv.suggested == 1. intv.suggest(2.) assert intv.suggested == 1. intv.suggest(2., reset=True) assert intv.suggested == 2.
def test_write(): f = Frame() f.writer = writers.hdf5writer f.writer.verbosity = 0 filename = os.path.join(f.writer.datadir, "test.out") f.writer.write(f, 0, True, filename=filename) assert os.path.isfile(filename) with pytest.raises(RuntimeError): f.writer.write(f, 0, False, filename=filename) os.remove(filename) f.writer.overwrite = True f.writer.dumping = False f.writer.verbosity = 1 f.writer.write(f, 0, False, filename=filename) assert os.path.isfile(filename) shutil.rmtree(f.writer.datadir)
def test_simple_read_files(): f = Frame() f.addgroup("A") f.A.addfield("B", [0., 0.]) f.addfield("Y", 1.) def dYdx(f, x, Y): return -Y f.Y.differentiator = dYdx f.addintegrationvariable("x", 0.) def dx(f): return 1. f.x.updater = dx f.x.snapshots = [1.] f.integrator = Integrator(f.x) f.integrator.instructions = [Instruction(schemes.expl_1_euler, f.Y)] f.writer = writers.hdf5writer() f.run() x = f.writer.read.sequence("x") assert np.all(x == [0., 1.]) Y = f.writer.read.sequence("Y") assert np.all(Y == [1., 0.]) B = f.writer.read.sequence("A.B") assert np.all(B == [0., 0.]) with pytest.raises(TypeError): f.writer.read.sequence(1) data = f.writer.read.all() assert np.all(data.x == [0., 1.]) assert np.all(data.Y == [1., 0.]) assert np.all(data.A.B == [0., 0.]) data0000 = f.writer.read.output(0) assert np.all(data0000.x == 0.) assert np.all(data0000.Y == 1.) assert np.all(data0000.A.B == 0.) with pytest.raises(RuntimeError): f.writer.read.output(2) shutil.rmtree(f.writer.datadir) with pytest.raises(RuntimeError): f.writer.datadir = "temp" f.writer.read.all() with pytest.raises(RuntimeError): f.writer.read.sequence("x") f.writer.datadir = "data"
def test_simple(): f = Frame() f.addfield("Y", 1.) def dYdx(f, x, Y): return -Y f.Y.differentiator = dYdx f.addintegrationvariable("x", 0.) def dx(f): return 1. f.x.updater = dx f.x.snapshots = [1.] f.integrator = Integrator(f.x) f.integrator.instructions = [Instruction(schemes.expl_1_euler, f.Y)] f.run() assert f.Y == 0. assert f.x.prevstepsize == 1.
def test_intvar_snapshots(): f = Frame() intv = IntVar(f, 2.1) with pytest.raises(ValueError): intv.snapshots = [2., 1.] with pytest.raises(ValueError): intv.snapshots = [1., 1.] def dx(x): return 1. intv.updater = dx intv.snapshots = [] with pytest.raises(ValueError): intv.nextsnapshot with pytest.raises(ValueError): intv.prevsnapshot intv.snapshots = [1., 2., 3.] assert intv.nextsnapshot == 3. assert intv.prevsnapshot == 2.
def test_group_repr_str(): f = Frame() assert isinstance(repr(f), str) assert isinstance(str(f), str) f.addintegrationvariable("x", 0) f.addfield("Y", 1.) f.addfield("abcdefghijklm", 0.) f.addgroup("A") f.addgroup("BCDEFGHIJKLMN") f.C = None f.abcdef1234567 = None f.A.addfield("k", 0.) assert isinstance(repr(f), str) assert isinstance(str(f), str) assert isinstance(repr(f.A), str) assert isinstance(str(f.A), str) f.integrator = Integrator(f.x) f.writer = writers.namespacewriter() assert isinstance(repr(f), str) assert isinstance(str(f), str)