def setUp(self):
from sas.models.DABModel import DABModel
self.model= DABModel()
self.scale = 10.0
self.length = 40.0
self.back = 1.0
self.model.setParam('scale', self.scale)
self.model.setParam('length', self.length)
self.model.setParam('background', self.back)
class TestDAB(unittest.TestCase):
"""
Unit tests for DAB function
F(x) = scale/( 1 + (x*L)^2 )^(2) + bkd
The model has three parameters:
L = Correlation Length
scale = scale factor
bkd = incoherent background
"""
def _func(self, Izero, range, incoh, qval):
return Izero* pow(range,3)/pow((1.0 + (qval*range)*(qval*range)),2) + incoh
def setUp(self):
from sas.models.DABModel import DABModel
self.model= DABModel()
self.scale = 10.0
self.length = 40.0
self.back = 1.0
self.model.setParam('scale', self.scale)
self.model.setParam('length', self.length)
self.model.setParam('background', self.back)
def test1D(self):
self.assertEqual(self.model.run(2.0), self._func(self.scale, self.length, self.back, 2.0))
self.assertEqual(self.model.runXY(2.0), self._func(self.scale, self.length, self.back, 2.0))
def test2D(self):
#value = self._func(self.scale, self.length, self.back, 1.0)*self._func(self.scale, self.length, self.back, 2.0)
value = self._func(self.scale, self.length, self.back, math.sqrt(5.0))
self.assertEqual(self.model.runXY([1.0,2.0]), value)
def test2Dphi(self):
x = 1.0
y = 2.0
r = math.sqrt(x**2 + y**2)
phi = math.atan2(y, x)
value = self._func(self.scale, self.length, self.back, x)*self._func(self.scale, self.length, self.back, y)
self.assertAlmostEquals(self.model.run([x, y]), value,1)
