nanovna-saver/tests/test_touchstone.py

196 wiersze
7.7 KiB
Python

# NanoVNASaver
#
# A python program to view and export Touchstone data from a NanoVNA
# Copyright (C) 2019, 2020 Rune B. Broberg
# Copyright (C) 2020,2021 NanoVNA-Saver Authors
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
import unittest
import logging
import os
# Import targets to be tested
from NanoVNASaver.Touchstone import Options, Touchstone
from NanoVNASaver.RFTools import Datapoint
class TestTouchstoneOptions(unittest.TestCase):
def setUp(self):
self.opts = Options()
def test_defaults(self):
self.assertEqual(self.opts.unit, "ghz")
self.assertEqual(self.opts.parameter, "s")
self.assertEqual(self.opts.format, "ma")
self.assertEqual(self.opts.resistance, 50)
self.assertEqual(self.opts.factor, 1000000000)
self.assertEqual(str(self.opts), "# GHZ S MA R 50")
def test_parse(self):
self.assertRaisesRegex(
TypeError, "Not an option line:",
self.opts.parse, "")
self.assertRaisesRegex(
TypeError, "Not an option line: !",
self.opts.parse, "!")
self.assertRaisesRegex(
TypeError, "Illegal option line: # ILLEGAL",
self.opts.parse, "# ILLEGAL")
self.assertRaisesRegex(
TypeError, "Illegal option line: # GHz mhz",
self.opts.parse, "# GHz mhz")
self.opts.parse('# khz')
self.assertEqual(str(self.opts), "# KHZ S MA R 50")
self.assertEqual(self.opts.factor, 1000)
self.opts.parse('# r 123 ri hz y')
self.assertEqual(str(self.opts), "# HZ Y RI R 123")
self.assertEqual(self.opts.factor, 1)
class TestTouchstoneTouchstone(unittest.TestCase):
def test_load(self):
ts = Touchstone("./tests/data/valid.s1p")
ts.load()
self.assertEqual(str(ts.opts), "# HZ S RI R 50")
self.assertEqual(len(ts.s11), 1010)
self.assertEqual(len(ts.s21), 0)
self.assertEqual(ts.r, 50)
ts = Touchstone("./tests/data/valid.s2p")
ts.load()
ts.gen_interpolation()
self.assertEqual(str(ts.opts), "# HZ S RI R 50")
self.assertEqual(len(ts.s11), 1020)
self.assertEqual(len(ts.s21), 1020)
self.assertEqual(len(ts.s12), 1020)
self.assertEqual(len(ts.s22), 1020)
self.assertIn("! Vector Network Analyzer VNA R2", ts.comments)
self.assertEqual(ts.min_freq(), 500000)
self.assertEqual(ts.max_freq(), 900000000)
self.assertEqual(ts.s_freq("11", 1),
Datapoint(1, -3.33238E-001, 1.80018E-004))
self.assertEqual(ts.s_freq("11", 750000),
Datapoint(750000, -0.3331754099382822,
0.00032433255669243524))
ts = Touchstone("./tests/data/ma.s2p")
ts.load()
self.assertEqual(str(ts.opts), "# MHZ S MA R 50")
ts = Touchstone("./tests/data/db.s2p")
ts.load()
self.assertEqual(str(ts.opts), "# HZ S DB R 50")
ts = Touchstone("./tests/data/broken_pair.s2p")
with self.assertLogs(level=logging.ERROR) as cm:
ts.load()
self.assertRegex(cm.output[0], "Data values aren't pairs")
ts = Touchstone("./tests/data/missing_pair.s2p")
with self.assertLogs(level=logging.ERROR) as cm:
ts.load()
self.assertRegex(cm.output[0], "Inconsistent number")
ts = Touchstone("./tests/data/nonexistent.s2p")
with self.assertLogs(level=logging.ERROR) as cm:
ts.load()
self.assertRegex(cm.output[0], "No such file or directory")
def test_swap(self):
ts = Touchstone("./tests/data/valid.s2p")
ts.load()
s11, s21, s12, s22 = ts.sdata
ts.swap()
s11_, s21_, s12_, s22_ = ts.sdata
self.assertEqual([s11_, s21_, s12_, s22_], [s22, s12, s21, s11])
def test_db_conversation(self):
ts_db = Touchstone("./tests/data/attenuator-0643_DB.s2p")
ts_db.load()
ts_ri = Touchstone("./tests/data/attenuator-0643_RI.s2p")
ts_ri.load()
ts_ma = Touchstone("./tests/data/attenuator-0643_MA.s2p")
ts_ma.load()
self.assertEqual(len(ts_db.s11), len(ts_ri.s11))
for dps_db, dps_ri in zip(ts_db.s11, ts_ri.s11):
self.assertAlmostEqual(dps_db.z, dps_ri.z, places=5)
self.assertEqual(len(ts_db.s11), len(ts_ma.s11))
for dps_db, dps_ma in zip(ts_db.s11, ts_ma.s11):
self.assertAlmostEqual(dps_db.z, dps_ma.z, places=5)
def test_load_scikit(self):
ts = Touchstone("./tests/data/scikit_unordered.s2p")
with self.assertLogs(level=logging.WARNING) as cm:
ts.load()
self.assertEqual(cm.output, [
'WARNING:NanoVNASaver.Touchstone:'
'Non integer resistance value: 50.0',
'WARNING:NanoVNASaver.Touchstone:Comment after header:'
' !freq ReS11 ImS11 ReS21 ImS21 ReS12 ImS12 ReS22 ImS22',
'WARNING:NanoVNASaver.Touchstone:Frequency not ascending:'
' 15000000.0 0.849810063 -0.4147357 -0.000306106 0.0041482'
' 0.0 0.0 0.0 0.0',
'WARNING:NanoVNASaver.Touchstone:Reordering data',
])
self.assertEqual(str(ts.opts), "# HZ S RI R 50")
self.assertEqual(len(ts.s11), 101)
self.assertIn("!freq ReS11 ImS11 ReS21 ImS21 ReS12 ImS12 ReS22 ImS22",
ts.comments)
def test_setter(self):
ts = Touchstone("")
dp_list = [Datapoint(1, 0.0, 0.0), Datapoint(3, 1.0, 1.0)]
ts.s11 = dp_list[:]
ts.s21 = dp_list[:]
ts.s12 = dp_list[:]
ts.s22 = dp_list[:]
self.assertEqual(ts.s11, dp_list)
self.assertEqual(ts.s21, dp_list)
self.assertEqual(ts.s12, dp_list)
self.assertEqual(ts.s22, dp_list)
self.assertEqual(ts.min_freq(), 1)
self.assertEqual(ts.max_freq(), 3)
ts.gen_interpolation()
self.assertEqual(ts.s_freq("11", 2), Datapoint(2, 0.5, 0.5))
def test_save(self):
ts = Touchstone("./tests/data/valid.s2p")
self.assertEqual(ts.saves(), "# HZ S RI R 50\n")
ts.load()
lines = ts.saves().splitlines()
self.assertEqual(len(lines), 1021)
self.assertEqual(lines[0], "# HZ S RI R 50")
self.assertEqual(lines[1], '500000 -0.333238 0.000180018')
self.assertEqual(lines[-1], '900000000 -0.127646 0.31969')
lines = ts.saves(4).splitlines()
self.assertEqual(len(lines), 1021)
self.assertEqual(lines[0], "# HZ S RI R 50")
self.assertEqual(lines[1],
'500000 -0.333238 0.000180018 0.67478 -8.1951e-07'
' 0.67529 -8.20129e-07 -0.333238 0.000308078')
self.assertEqual(lines[-1],
'900000000 -0.127646 0.31969 0.596287 -0.503453'
' 0.599076 -0.50197 -0.122713 0.326965')
ts.filename = "./tests/data/output.s2p"
ts.save(4)
os.remove(ts.filename)
ts.filename = ""
self.assertRaises(FileNotFoundError, ts.save)
ts.s11[0] = Datapoint(100, 0.1, 0.1)
self.assertRaisesRegex(
LookupError, "Frequencies of sdata not correlated", ts.saves, 4)