# Source code for PyMca5.tests.GefitTest

    #/*##########################################################################
    #
    # The PyMca X-Ray Fluorescence Toolkit
    #
    # Copyright (c) 2004-2014 European Synchrotron Radiation Facility
    #
    # This file is part of the PyMca X-ray Fluorescence Toolkit developed at
    # the ESRF by the Software group.
    #
    # 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.
    #
    #############################################################################*/
    __author__ = "V. Armando Sole - ESRF Data Analysis"
    __contact__ = "sole@esrf.fr"
    __license__ = "MIT"
    __copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
    import unittest
    import os
    import numpy

    class testGefit(unittest.TestCase):
        def setUp(self):
            """
            import the module
            """
            try:
                from PyMca5.PyMcaMath.fitting import Gefit
                self.gefit = Gefit
            except:
                self.gefit = None

        def gaussianPlusLinearBackground(self, param, t):
            dummy = 2.3548200450309493 * (t - param[3])/ param[4]
            return param[0] + param[1] * t +\
                   param[2] * numpy.exp(-0.5 * dummy * dummy)

        def testGefitImport(self):
            self.assertTrue(self.gefit is not None)

        def testGefitLeastSquares(self):
            self.testGefitImport()
            x = numpy.arange(500.)
            originalParameters = numpy.array([10.5, 2, 1000.0, 200., 100],
                                             numpy.float)
            fitFunction = self.gaussianPlusLinearBackground
            y = fitFunction(originalParameters, x)

            startingParameters = [0.0 ,1.0,900.0, 150., 90]
            fittedpar, chisq, sigmapar =self.gefit.LeastSquaresFit(fitFunction,
                                                         startingParameters,
                                                         xdata=x,
                                                         ydata=y,
                                                         sigmadata=None)
            for i in range(len(originalParameters)):
                self.assertTrue(abs(fittedpar[i] - originalParameters[i]) < 0.01)

    def getSuite(auto=True):
        testSuite = unittest.TestSuite()
        if auto:
            testSuite.addTest(\
                unittest.TestLoader().loadTestsFromTestCase(testGefit))
        else:
            # use a predefined order
            testSuite.addTest(testGefit("testGefitImport"))
            testSuite.addTest(testGefit("testGefitLeastSquares"))
        return testSuite

    def test(auto=False):
        unittest.TextTestRunner(verbosity=2).run(getSuite(auto=auto))

    if __name__ == '__main__':
        test()