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# coding: utf-8
# /*##########################################################################
# Copyright (C) 2018 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ############################################################################*/
"""Tests of the calibration module"""
from __future__ import division
__authors__ = ["P. Knobel"]
__license__ = "MIT"
__date__ = "14/05/2018"
import unittest
import numpy
from silx.math.calibration import NoCalibration, LinearCalibration, \
ArrayCalibration, FunctionCalibration
X = numpy.array([3.14, 2.73, 1337])
class TestNoCalibration(unittest.TestCase):
def setUp(self):
self.calib = NoCalibration()
def testIsAffine(self):
self.assertTrue(self.calib.is_affine())
def testSlope(self):
self.assertEqual(self.calib.get_slope(), 1.)
def testYIntercept(self):
self.assertEqual(self.calib(0.),
0.)
def testCall(self):
self.assertTrue(numpy.array_equal(self.calib(X), X))
class TestLinearCalibration(unittest.TestCase):
def setUp(self):
self.y_intercept = 1.5
self.slope = 2.5
self.calib = LinearCalibration(y_intercept=self.y_intercept,
slope=self.slope)
def testIsAffine(self):
self.assertTrue(self.calib.is_affine())
def testSlope(self):
self.assertEqual(self.calib.get_slope(), self.slope)
def testYIntercept(self):
self.assertEqual(self.calib(0.),
self.y_intercept)
def testCall(self):
self.assertTrue(numpy.array_equal(self.calib(X),
self.y_intercept + self.slope * X))
class TestArrayCalibration(unittest.TestCase):
def setUp(self):
self.arr = numpy.array([45.2, 25.3, 666., -8.])
self.calib = ArrayCalibration(self.arr)
self.affine_calib = ArrayCalibration([0.1, 0.2, 0.3])
def testIsAffine(self):
self.assertFalse(self.calib.is_affine())
self.assertTrue(self.affine_calib.is_affine())
def testSlope(self):
with self.assertRaises(AttributeError):
self.calib.get_slope()
self.assertEqual(self.affine_calib.get_slope(),
0.1)
def testYIntercept(self):
self.assertEqual(self.calib(0),
self.arr[0])
def testCall(self):
with self.assertRaises(ValueError):
# X is an array with a different shape
self.calib(X)
with self.assertRaises(ValueError):
# floats are not valid indices
self.calib(3.14)
self.assertTrue(
numpy.array_equal(self.calib([1, 2, 3, 4]),
self.arr))
for idx, value in enumerate(self.arr):
self.assertEqual(self.calib(idx), value)
class TestFunctionCalibration(unittest.TestCase):
def setUp(self):
self.non_affine_fun = numpy.sin
self.non_affine_calib = FunctionCalibration(self.non_affine_fun)
self.affine_fun = lambda x: 52. * x + 0.01
self.affine_calib = FunctionCalibration(self.affine_fun,
is_affine=True)
def testIsAffine(self):
self.assertFalse(self.non_affine_calib.is_affine())
self.assertTrue(self.affine_calib.is_affine())
def testSlope(self):
with self.assertRaises(AttributeError):
self.non_affine_calib.get_slope()
self.assertAlmostEqual(self.affine_calib.get_slope(),
52.)
def testCall(self):
for x in X:
self.assertAlmostEqual(self.non_affine_calib(x),
self.non_affine_fun(x))
self.assertAlmostEqual(self.affine_calib(x),
self.affine_fun(x))
def suite():
test_suite = unittest.TestSuite()
loadTests = unittest.defaultTestLoader.loadTestsFromTestCase
test_suite.addTest(loadTests(TestNoCalibration))
test_suite.addTest(loadTests(TestArrayCalibration))
test_suite.addTest(loadTests(TestLinearCalibration))
test_suite.addTest(loadTests(TestFunctionCalibration))
return test_suite
if __name__ == '__main__':
unittest.main(defaultTest="suite")
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