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test_powertermgenerator.py
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179 lines (144 loc) · 6.33 KB
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import os
import sys
import unittest
sys.path.append(os.path.join(os.path.dirname(__file__), ".."))
from test_util import ScanPointGeneratorTest
from scanpointgenerator import PowerTermGenerator
def _get_gen(start, stop, focus, exponent):
return PowerTermGenerator('x', 'mm', start, stop, focus, exponent, 1)
class PowerGeneratorTest(ScanPointGeneratorTest):
def test_axis_and_units(self):
gen = _get_gen(0, 100, 20, 3)
self.assertEqual(gen.units, dict(x="mm"))
def test_array_positions(self):
# We only need to test positions for one set of parameters
# as long as we can reliably find the sign, xf and size
gen = PowerTermGenerator("x", "mm", 260., 360., 280., 3, 10)
expected = [260., 262.12998637, 264.10310768, 265.92536394,
267.60275514, 269.14128128, 270.54694237, 271.8257384,
272.98366937, 274.02673528, 274.96093614, 275.79227194,
276.52674269, 277.17034837, 277.729089, 278.20896458,
278.61597509, 278.95612055, 279.23540095, 279.4598163,
279.63536658, 279.76805182, 279.86387199, 279.92882711,
279.96891717, 279.99014217, 279.99850211, 279.999997,
280.00062683, 280.00639161, 280.02329133, 280.05732599,
280.11449559, 280.20080014, 280.32223963, 280.48481406,
280.69452344, 280.95736776, 281.27934702, 281.66646122,
282.12471037, 282.66009446, 283.2786135, 283.98626747,
284.78905639, 285.69298026, 286.70403906, 287.82823281,
289.0715615, 290.44002514, 291.93962371, 293.57635724,
295.3562257, 297.28522911, 299.36936746, 301.61464075,
304.02704899, 306.61259216, 309.37727029, 312.32708335,
315.46803136, 318.80611431, 322.3473322, 326.09768504,
330.06317282, 334.24979554, 338.66355321, 343.31044582,
348.19647337, 353.32763587, 358.7099333]
gen.prepare_positions()
self.assertListAlmostEqual(gen.positions['x'], expected)
# The following 12 tests test that the equation sign, xf, and scan size
# are correctly calculated in 12 distinct scenarios
# (the first 6 with an odd exponent, the final 6 with an even exponent)
def test_params1(self):
# 1) start < focus < stop
gen = _get_gen(0, 100, 27, 3)
self._check_params(gen, 1, 3, 8)
def test_params2(self):
# 2) start < stop < focus
gen = _get_gen(0, 26, 27, 3)
self._check_params(gen, 1, 3, 3)
def test_params3(self):
# 3) focus < start < stop
gen = _get_gen(20, 85, 12, 3)
self._check_params(gen, 1, -2, 3)
def test_params4(self):
# 4) start > focus > stop
gen = _get_gen(77, 0, 50, 3)
self._check_params(gen, -1, 3, 7)
def test_params5(self):
# 5) start > stop > focus
gen = _get_gen(27, 1, 0, 3)
self._check_params(gen, -1, 3, 3)
def test_params6(self):
# 6) focus > start > stop
gen = _get_gen(73, 0, 100, 3)
self._check_params(gen, -1, -3, 2)
def test_params7(self):
# 7) focus < start < stop
gen = _get_gen(9, 8, 0, 2)
self._check_params(gen, 1, 3, 6)
def test_params8(self):
# 8) focus < stop < start
gen = _get_gen(9, 12, 0, 2)
self._check_params(gen, 1, 3, 7)
def test_params9(self):
# 9) focus < start = stop
gen = _get_gen(9, 9, 0, 2)
self._check_params(gen, 1, 3, 7)
def test_params10(self):
# 10) focus > start > stop
gen = _get_gen(2, 0, 18, 2)
self._check_params(gen, -1, 4, 9)
def test_params11(self):
# 11) focus > stop > start
gen = _get_gen(2, 4, 18, 2)
self._check_params(gen, -1, 4, 8)
def test_params12(self):
# 12) focus > stop = start
gen = _get_gen(0, 0, 9, 2)
self._check_params(gen, -1, 3, 7)
def _check_params(self, gen, sign, xf, size):
self.assertEquals(gen.sign, sign)
self.assertEquals(gen.xf, xf)
self.assertEquals(gen.size, size)
def test_to_dict(self):
g = PowerTermGenerator('energy', 'eV', 260., 350., 280., 3, 5)
expected = dict()
expected['typeid'] = "scanpointgenerator:generator/PowerTermGenerator:1.0"
expected['axes'] = ['energy']
expected['units'] = "eV"
expected['start'] = 260.
expected['stop'] = 350.
expected['focus'] = 280.
expected['exponent'] = 3
expected['divisor'] = 5.
expected['alternate'] = False
self.assertEquals(g.to_dict(), expected)
def test_from_dict(self):
_dict = dict()
_dict['axes'] = "x"
_dict['units'] = "cm"
_dict['start'] = 270.
_dict['stop'] = 500.
_dict['focus'] = 280.
_dict['exponent'] = 3
_dict['divisor'] = 20.5
_dict['alternate'] = False
units_dict = dict()
units_dict['x'] = "cm"
gen = PowerTermGenerator.from_dict(_dict)
self.assertEqual(gen.axes, ["x"])
self.assertEqual(gen.units, units_dict)
self.assertEqual(gen.start, 270.)
self.assertEqual(gen.stop, 500.)
self.assertEqual(gen.focus, 280.)
self.assertEqual(gen.exponent, 3)
self.assertEqual(gen.divisor, 20.5)
# Argument validation tests
def test_zero_divisor_raises(self):
with self.assertRaises(ValueError):
PowerTermGenerator('x', 'mm', 0, 10, 5, 3, 0.)
def test_fractional_exponent_raises(self):
with self.assertRaises(ValueError):
PowerTermGenerator('x', 'mm', 0, 10, 10, 3.5, 1)
def test_negative_exponent_raises(self):
with self.assertRaises(ValueError):
PowerTermGenerator('x', 'mm', 0, 10, 10, -5, 1)
def test_invalid_parameters1(self):
# even exponent and start < focus < stop
with self.assertRaises(ValueError):
PowerTermGenerator('x', 'mm', 0, 100, 50, 2, 1)
def test_invalid_parameters2(self):
# even exponent and start > focus > stop
with self.assertRaises(ValueError):
PowerTermGenerator('x', 'mm', 100, 0, 50, 2, 1)
if __name__ == "__main__":
unittest.main(verbosity=2)