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"""Test iterating through a vtkCollection with the standard python syntax"""
import vtk
from vtk.test import Testing
class TestIterateCollection(Testing.vtkTest):
def setUp(self):
self.vtkObjs = [vtk.vtkObject() for _ in range(30)]
self.collection = vtk.vtkCollection()
for obj in self.vtkObjs:
self.collection.AddItem(obj)
self.emptyCollection = vtk.vtkCollection()
def testIterateCollection(self):
newObjsList = [obj for obj in self.collection]
self.assertEqual(self.vtkObjs, newObjsList)
counter = 0
for _ in self.collection:
counter += 1
self.assertEqual(counter, 30)
counter = 0
for _ in self.emptyCollection:
counter += 1
self.assertEqual(counter, 0)
def testCollectionChild(self):
#check that iteration is being inherited correctly
dataArray = vtk.vtkIntArray()
dataArrayCollection = vtk.vtkDataArrayCollection()
dataArrayCollection.AddItem(dataArray)
self.assertEqual([obj for obj in dataArrayCollection],
[dataArray])
def testOperators(self):
self.assertTrue(self.vtkObjs[0] in self.collection)
self.assertEqual(list(self.collection), self.vtkObjs)
def testReferenceCounting(self):
initialReferenceCount = self.collection.GetReferenceCount()
list(self.collection)
self.assertEqual(self.collection.GetReferenceCount(), initialReferenceCount)
if __name__ == "__main__":
Testing.main([(TestIterateCollection, 'test')])
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