def test_from_json():
'''basic test of JSON deserialization'''
s_json = '''{
"__class__": "sysdiag.System",
"__sysdiagclass__": "System",
"name": "my syst",
"params": {},
"ports": [],
"subsystems": [],
"wires": []
}'''
s = sysdiag.json_load(s_json)
assert_is(type(s), sysdiag.System)
assert_equal(s.name, "my syst")
# Test a port:
p_json = '''{
"__class__": "sysdiag.Port",
"__sysdiagclass__": "Port",
"name": "my port",
"type": ""
}'''
p = sysdiag.json_load(p_json)
assert_is(type(p), sysdiag.Port)
assert_equal(p.name, "my port")
# Test a wire:
w_json = '''{
def test_json():
'''basic test of JSON serialization/deserialization'''
# PI controller block (example of Laplace tranfer)
K = 1
Ti = 0.1
ctrl = blocks.TransferFunction('controller', [1, K*Ti],[0, Ti])
s_json = '''{
"__class__": "blocks.TransferFunction",
"__sysdiagclass__": "System",
"name": "controller",
"params": {
"den": [
0,
0.1
],
"num": [
1,
0.1
]
},
"ports": [],
"subsystems": [],
"wires": []
}'''
# Compare JSON without whitespaces:
assert_equal(ctrl.json_dump().replace(' ',''), s_json.replace(' ',''))
import sysdiag
ctrl1 = sysdiag.json_load(s_json)
assert_is(type(ctrl1), blocks.TransferFunction)
assert_equal(ctrl1.name, "controller")
assert_equal(ctrl, ctrl1)
Src = blocks.Source('src', root)
K = 2; Ti = .2
Ctrl = blocks.TransferFunction('controller', [1, K*Ti],[0, Ti], root) # PI control
Plant = blocks.TransferFunction('plant', [1], [0, 1], root) # integrator
Cmp = blocks.Summation('compare', ops = ['+','-'], parent = root)
Out = blocks.Sink(parent=root)
w0 = blocks.connect_systems(Src, Cmp, d_pname='in0')
w1 = blocks.connect_systems(Cmp, Ctrl)
w2 = blocks.connect_systems(Ctrl, Plant)
w3 = blocks.connect_systems(Plant, Cmp, d_pname='in1')
w4 = blocks.connect_systems(Plant, Out)
assert w3 == w4
print(root)
print('Compute incidence matrix')
inc_mat = blocks.incidence_matrix(root)
print(inc_mat)
# Serialize/Deserialize:
r_json = root.json_dump()
import sysdiag
r1 = sysdiag.json_load(r_json)
print('Serialize/Deserialize:')
print('root == r1: {:s}'.format(str(root == r1)))