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tests.py
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tests.py
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import io
import logging
import unittest
import unittest.mock
import nodal as n
import nodal.equiv
def check_input(data):
n.Component.check_input(None, data)
class ResistanceTesters(unittest.TestCase):
equivs = {"resistive_1.csv": 2.0, "resistive_2.csv": 1.0, "resistive_3.csv": 1.0}
resistive = {
"resistive_1.csv": True,
"resistive_2.csv": True,
"1.6.1.csv": False,
"netlist.csv": False,
"opmodel_amplifier.csv": False,
}
def test_equivalent_resistance(self):
for path, result in self.equivs.items():
netlist = n.Netlist("doc/" + path)
r = n.equiv.equivalent_resistance(netlist, "1", "g")
if r != result:
assert False
def test_check_resistive(self):
for path, result in self.resistive.items():
netlist = n.Netlist("doc/" + path)
r = n.equiv.check_resistive(netlist)
if r != result:
assert False
class IntegratedTest(unittest.TestCase):
@unittest.mock.patch("sys.stdout", new_callable=io.StringIO)
def assert_print(self, path, expected, mock_stdout):
netlist = n.Netlist(path)
circuit = n.Circuit(netlist)
solution = circuit.solve()
print(solution)
output = mock_stdout.getvalue()
self.assertEqual(output, expected)
# Triple caution!!!
# For mock.patch to work correctly, test cases must be named test_something.
# I find this horrible, might change later
def test_doc_1_6_1(self):
path = "doc/1.6.1.csv"
expected = (
"Ground node: g\n"
"e(1) \t= 2.0\n"
"e(2) \t= -1.0\n"
"e(4) \t= 8.0\n"
"i(d1) \t= -1.9999999999999998\n"
"i(e1) \t= 3.0\n"
)
self.assert_print(path, expected)
def test_doc_buffer(self):
path = "doc/buffer.csv"
expected = (
"Ground node: g\n"
"e(1) \t= 9.999900000999991\n"
"e(2) \t= 9.999900000899993\n"
"e(3) \t= 10.0\n"
"i(d1) \t= -9.999889805101247e-12\n"
"i(vs) \t= 9.999900000899993e-12\n"
)
self.assert_print(path, expected)
def test_doc_netlist(self):
path = "doc/netlist.csv"
expected = "Ground node: 1\n" "e(2) \t= -1.0\n" "e(3) \t= -2.0\n"
self.assert_print(path, expected)
def test_doc_opmodel_amplifier(self):
path = "doc/opmodel_amplifier.csv"
expected = (
"Ground node: g\n"
"e(1) \t= 0.9998800143982737\n"
"e(2) \t= 1.9997600287845492\n"
"e(3) \t= 1.0000000000000002\n"
"e(q1_internal_node) \t= 11.998560172647306\n"
"i(q1_vcvs) \t= 0.9998800143862756\n"
"i(v1) \t= 1.1998560172647305e-11\n"
)
self.assert_print(path, expected)
def test_doc_opmodel_voltage_buffer(self):
path = "doc/opmodel_voltage_buffer.csv"
expected = (
"Ground node: g\n"
"e(2) \t= 0.999990000099999\n"
"e(3) \t= 0.9999999999999999\n"
"e(q1_internal_node) \t= 0.9999900000899992\n"
"i(q1_vcvs) \t= -9.999917560676863e-13\n"
"i(v1) \t= 9.999900000899992e-13\n"
)
self.assert_print(path, expected)
def test_test_1(self):
path = "doc/test_1.csv"
expected = (
"Ground node: g\n"
"e(1) \t= 1.0\n"
"e(2) \t= 1.0\n"
"e(3) \t= 1.0\n"
"e(4) \t= 1.0\n"
"e(5) \t= 1.0\n"
"e(6) \t= 1.0\n"
"i(d1) \t= -0.0\n"
"i(d2) \t= -0.0\n"
"i(d3) \t= 1.0\n"
"i(d4) \t= 1.0\n"
"i(e1) \t= -0.0\n"
)
self.assert_print(path, expected)
class InputTesters(unittest.TestCase):
def test_check_input_component(self):
bad_inputs = [
"aaaaa", # not enough arguments
"v1,VCVS,5,1,2",
"v1,VCCS,5,1,2",
"v1,CCVS,5,1,2",
"v1,CCCS,5,1,2",
"q1,OPMODEL,0,2,g,3",
"v1,VCVS,5,1,2,1,1,1", # too many arguments
"r1,R,5,1,2,3",
"r1,A,5,1,2,3",
"r1,E,5,1,2,3",
"q1,OPMODEL,1,2,g,3,1,5",
"v1,VoltageSource,5,1,2", # unknown type
"r1,R,one_ohm,1,2", # not a float
]
good_inputs = [
"r1,R,2,1,4",
"r2,R,2,1,g",
"r3,R,0.5,1,2",
"e1,E,8,4,g",
"a1,A,4,1,2",
"d1,CCCS,2,2,g,1,g,r2",
"Ri,R,1e7,1,3",
"Ro,R,1e1,1,2",
"vs,E,10,3,g",
"d1,VCVS,1e5,2,g,3,1",
"Ri,R,1e7,1,3",
"Ro,R,1e1,1,2",
"vs,E,10,3,g",
"d1,VCVS,1e5,2,g,3,1",
"q1,OPMODEL,1,2,g,3,1",
"q1,OPMODEL,0,2,g,3,2",
]
for bad in bad_inputs:
try:
check_input(bad.split(","))
except ValueError:
continue
assert False
for good in good_inputs:
try:
check_input(good.split(","))
except ValueError:
assert False
def test_check_input_component_empty_line(self):
try:
check_input([])
except ValueError:
assert False
def test_check_input_component_comment(self):
good = "# This is a comment"
try:
check_input(good)
except ValueError:
assert False
class GroundNode(unittest.TestCase):
def test_explicit_ground_node(self):
inputs = [{"g": 1}, {"g": 1, "a": 10, "b": 2}]
for deg in inputs:
assert n.find_ground_node(deg) == "g"
def test_highest_degree_ground_node(self):
inputs = [({"1": 1}, "1"), ({"3": 1, "a": 10, "b": 2}, "a")]
for deg, expected in inputs:
assert n.find_ground_node(deg) == expected
def test_stable_sorting_ground_node(self):
inputs = [({"1": 1, "2": 1}, "1"), ({"3": 1, "a": 10, "b": 10}, "a")]
for deg, expected in inputs:
assert n.find_ground_node(deg) == expected
class Connected(unittest.TestCase):
def test_connected(self):
paths = ["doc/1.6.1.csv", "doc/buffer.csv", "doc/netlist.csv"]
for path in paths:
netlist = n.Netlist(path)
assert n.is_connected(netlist)
def test_unconnected(self):
paths = ["doc/unconnected_1.csv"]
for path in paths:
netlist = n.Netlist(path)
assert not n.is_connected(netlist)
if __name__ == "__main__":
logging.getLogger().setLevel(logging.CRITICAL)
unittest.main()