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#!/usr/bin/python |
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import unittest |
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from modelframe import * |
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import math |
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from cStringIO import StringIO |
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from xml.dom import minidom |
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class XMLDocumentTestCase(unittest.TestCase): |
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def setUp(self): |
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o1=ODETEST(debug=False) |
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o1.u=10 |
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o2=ODETEST(debug=False) |
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o2.u=-10. |
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o1.f=Link(o2,"u") |
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o2.f=Link(o1,"u") |
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m=Messenger() |
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o1.dt=0.01 |
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m.message=Link(o1) |
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s=ExplicitSimulation([Simulation([o1,o2],debug=False),m],debug=False) |
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s.run() |
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output = StringIO() |
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s.writeXML(output) |
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output.reset() |
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outputList = output.readlines() |
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self.xmlList = outputList |
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|
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def testFirstLine(self): |
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firstLine = self.xmlList[0] |
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self.assertEqual('<?xml version="1.0" ?>\n', firstLine) |
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|
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def testEsysHeader(self): |
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header = self.xmlList[1] |
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self.assertEqual('<ESys>\n', header) |
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|
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def testEsysFooter(self): |
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footer = self.xmlList[-1] |
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self.assertEqual('</ESys>\n', footer) |
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|
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def testSimulationHeader(self): |
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pass |
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def testSimulationFooter(self): |
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pass |
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class SimulationTestCase(unittest.TestCase): |
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def setUp(self): |
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o1=ODETEST(debug=False) |
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o1.u=10 |
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o2=ODETEST(debug=False) |
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o2.u=-10. |
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o1.f=Link(o2,"u") |
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o2.f=Link(o1,"u") |
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m=Messenger() |
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o1.dt=0.01 |
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m.message=Link(o1) |
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self.s=s=ExplicitSimulation([Simulation([o1,o2],debug=False),m],debug=False) |
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s.run() |
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output = StringIO() |
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s.writeXML(output) |
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output.reset() |
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self.xml = output.read() |
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|
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def testSimulation(self): |
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assert "<Link" in self.xml, "I should see a link" |
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o = parse(self.xml) |
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output = StringIO() |
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o.writeXML(output) |
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output.reset() |
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xml = output.read() |
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assert '<Link' in xml, "Missing a link! It should be in this!" |
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class LinkTestCase(unittest.TestCase): |
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def setUp(self): |
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self.o1=ODETEST(debug=False) |
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#self.o1.u=10 |
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self.o2=ODETEST(debug=False) |
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self.o2.u=-10. |
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self.o1.f=Link(self.o2,"u") |
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self.o2.f=Link(self.o1,"u") |
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self.o2.declareParameter(child=self.o1) |
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def testLinkCreation(self): |
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self.o1.f=Link(self.o2,"u") |
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assert self.o1.f |
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def testLinkValue(self): |
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self.assertEqual(self.o1.f, -10) |
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def testLinkTarget(self): |
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pass |
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def testLinkDefaultAttribute(self): |
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Link(self.o2) |
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def testLinkXML(self): |
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s = StringIO() |
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self.o2.writeXML(s) |
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s.reset() |
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xmlout = s.read() |
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assert '<Link' in xmlout |
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def testLinkTargetXML(self): |
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pass |
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class ParamaterSetTestCase(unittest.TestCase): |
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def setUp(self): |
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self.p = ParameterSet() |
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self.p.declareParameter(gamma1=1.,gamma2=2.,gamma3=3.) |
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def testParameterSetCreation(self): |
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self.assertEqual(self.p.gamma1, 1.) |
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def testParameterSetXMLCreation(self): |
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s = StringIO() |
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self.p.writeXML(s) |
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s.reset() |
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xmlout = s.read() |
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assert ("gamma1" in xmlout) |
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assert ("gamma2" in xmlout) |
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assert ("gamma3" in xmlout) |
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parsable = minidom.parseString(xmlout) |
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assert parsable.getElementsByTagName("ParameterSet") |
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def testParameterSetFromXML(self): |
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doc = self._dom() |
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pset = ParameterSet.fromDom(doc.getElementsByTagName("ParameterSet")[0]) |
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assert (isinstance(pset, ParameterSet)) |
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self.assertEqual(self.p.gamma1,pset.gamma1) |
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def testParameterSetWithChildrenFromXML(self): |
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p2 = ParameterSet() |
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p2.declareParameter(s="abc", f=3.) |
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self.p.declareParameter(child=p2) |
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doc = self._dom() |
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pset = ParameterSet.fromDom(doc.getElementsByTagName("ParameterSet")[0]) |
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self.assertEqual(self.p.child.f, pset.child.f) |
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def testParameterSetChild(self): |
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p2 = ParameterSet() |
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p2.declareParameter(s="abc", f=3.) |
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self.p.declareParameter(child=p2) |
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self.assertEqual(self.p.child.s, "abc") |
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self.assertEqual(self.p.child.f, 3.) |
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def _dom(self): |
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s = StringIO() |
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self.p.writeXML(s) |
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s.reset() |
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xmlout = s.read() |
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doc = minidom.parseString(xmlout) |
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return doc |
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class ModeltoDomTestCase(unittest.TestCase): |
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def _dom(self): |
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s = StringIO() |
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self.o1.writeXML(s) |
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s.reset() |
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xmlout = s.read() |
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doc = minidom.parseString(xmlout) |
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return doc |
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def setUp(self): |
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self.o1=ODETEST(debug=False) |
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def testModelExists(self): |
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assert self._dom().getElementsByTagName("Model") |
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#print self._dom().toxml() |
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def testModelhasID(self): |
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assert int(self._dom().getElementsByTagName("Model")[0].getAttribute("id"))>99 |
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class Messenger(Model): |
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def __init__(self, *args, **kwargs): |
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Model.__init__(self, *args, **kwargs) |
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self.declareParameter(message="none") |
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def doInitialization(self,t): |
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self.__t=t |
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#print "I start talking now!" |
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def doStep(self,dt): |
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self.__t+=dt |
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#print "Message (time %e) : %s "%(self.__t,self.message) |
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def doFinalization(self): |
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#print "I have no more to say!" |
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pass |
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class ODETEST(Model): |
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""" implements a solver for the ODE |
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du/dt=a*u+f(t) |
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we use a implicit euler scheme : |
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u_n-u_{n-1}= dt*a u_n + st*f(t_n) |
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to get u_n we run an iterative process |
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u_{n.k}=u_{n-1}+dt*(a u_{n.i-1} + f(t_n)) |
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input for this model are step size dt, end time tend and a value for |
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a, f and initial value for u. we need also a tolerance tol for a |
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stopping criterion. |
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""" |
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def __init__(self, *args, **kwargs): |
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Model.__init__(self, *args, **kwargs) |
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self.declareParameter(tend=1.,dt=0.1,a=0.9,u=10.,f=0.,message="",tol=1.e-8) |
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def doInitialization(self,t): |
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self.__tn=t |
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self.__iter=0 |
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def doIterationInitialization(self,dt): |
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self.__iter=0 |
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self.__u_last=self.u |
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def doIterationStep(self,dt): |
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self.__iter+=1 |
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self.__u_old=self.u |
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self.u=self.__u_last+dt*(self.a*self.__u_old+self.f) |
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def terminate(self): |
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if self.__iter<1: |
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return False |
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else: |
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return abs(self.__u_old-self.u)<self.tol*abs(self.u) |
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def doIterationFinalization(self,dt): |
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self.__tn+=dt |
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self.message="current error = %e"%abs(self.u-10.*math.exp((self.a-1.)*self.__tn)) |
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def getSafeTimeStepSize(self,dt): |
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return min(self.dt,1./(abs(self.a)+1.)) |
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def finalize(self): |
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return self.__tn>=self.tend |
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if __name__ == "__main__": |
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unittest.main() |
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