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IPeakFunctionTest.py
95 lines (73 loc) · 2.91 KB
/
IPeakFunctionTest.py
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import unittest
from mantid.kernel import *
from mantid.api import *
import numpy as np
class MyPeak(IPeakFunction):
def init(self):
self.declareAttribute("Centre", 1)
self.declareAttribute("Height", 3.4)
self.declareAttribute("Width", 1.5)
def functionLocal(self, xvals):
return 5*xvals
class RectangularFunction(IPeakFunction):
def init(self):
self.declareParameter("Height")
self.declareParameter("Fwhm")
self.declareParameter("Center")
def centre(self):
return self.getParameterValue("Center")
def setCentre(self, newCenter):
self.setParameter("Center", newCenter)
def height(self):
return self.getParameterValue("Height")
def setHeight(self, newHeight):
self.setParameter("Height", newHeight)
def fwhm(self):
return self.getParameterValue("Fwhm")
def setFwhm(self, newFwhm):
self.setParameter("Fwhm", newFwhm)
def functionLocal(self, xvals):
center = self.getParameterValue("Center")
fwhm = self.getParameterValue("Fwhm")
height = self.getParameterValue("Height")
values = np.zeros(xvals.shape)
nonZero = (xvals > (center - fwhm/2.0)) & (xvals < (center + fwhm / 2.0))
values[nonZero] = height
return values
class IPeakFunctionTest(unittest.TestCase):
def test_instance_can_be_created_standalone(self):
func = MyPeak()
self.assertTrue(isinstance(func, IPeakFunction))
self.assertTrue(isinstance(func, IFunction1D))
def test_instance_can_be_created_from_factory(self):
FunctionFactory.subscribe(MyPeak)
func_name = MyPeak.__name__
func = FunctionFactory.createFunction(func_name)
self.assertTrue(isinstance(func, IPeakFunction))
self.assertTrue(isinstance(func, IFunction1D))
FunctionFactory.unsubscribe(func_name)
def test_functionLocal_can_be_called_directly(self):
func = MyPeak()
func.initialize()
xvals=np.array([1.,2.,3.])
out = func.functionLocal(xvals)
self.assertEquals(3, out.shape[0])
self.assertEquals(5., out[0])
self.assertEquals(10., out[1])
self.assertEquals(15., out[2])
def test_get_set_intensity(self):
func = RectangularFunction()
func.initialize()
func.setCentre(1.0)
func.setHeight(2.0)
func.setFwhm(3.0)
# This is a rectangle function with height 2 and width 3, centered
# around 1.0. The intensity should be 6.0 (height * width)
self.assertAlmostEquals(func.intensity(), 6.0, delta=1e-10)
# Setting the intensity only changes height, not width
func.setIntensity(12.0)
self.assertEquals(func.fwhm(), 3.0)
self.assertAlmostEquals(func.height(), 4.0, delta=1e-10)
self.assertAlmostEquals(func.intensity(), 12.0, delta=1e-10)
if __name__ == '__main__':
unittest.main()