def test_snapshot_deletion_of_non_reference_snapshot(self):
"""
Test that when snapshot is deleted and is not a reference for other snapshot, nothing happens
Here,
S1 is a reference
S2 has a reference on S1
S3 has a reference on S1
After deletion of S2, S3 should still have reference on S1
"""
s1 = Snapshot(stepResult=self.tsr1, image=None, refSnapshot=None, pixelsDiff=None)
s1.save()
s2 = Snapshot(stepResult=self.tsr2, image=None, refSnapshot=s1, pixelsDiff=None)
s2.save()
s3 = Snapshot(stepResult=self.tsr2, image=None, refSnapshot=s1, pixelsDiff=None)
s3.save()
s2.delete()
self.assertEqual(Snapshot.objects.get(pk=s3.id).refSnapshot, s1)
def test_snapshot_deletion_and_recomputing_on_previous_reference(self):
"""
Test that when snapshot is deleted and is a reference for other snapshot, this reference is removed and replaced by a previous reference when it exists
Here,
S1 is a reference
S2 is a reference
S3 has a reference on S2
After deletion of S2, S3 should have reference on S1
"""
s1 = Snapshot(stepResult=self.tsr1, image=None, refSnapshot=None, pixelsDiff=None)
s1.save()
s2 = Snapshot(stepResult=self.tsr2, image=None, refSnapshot=None, pixelsDiff=None)
s2.save()
s3 = Snapshot(stepResult=self.tsr2, image=None, refSnapshot=s2, pixelsDiff=None)
s3.save()
s2.delete()
self.assertEqual(Snapshot.objects.get(pk=s3.id).refSnapshot, s1)
def test_snapshot_deletion_of_last_snapshot(self):
"""
Test that nothing happens when the deleted snapshot is the last one
Here,
S1 is a reference
S2 has a reference on S1
S3 has a reference on S1
After deletion of S1, S2 becomes a reference S3 should have reference on S2
"""
s1 = Snapshot(stepResult=self.tsr1, image=None, refSnapshot=None, pixelsDiff=None)
s1.save()
s2 = Snapshot(stepResult=self.tsr2, image=None, refSnapshot=s1, pixelsDiff=None)
s2.save()
s2.delete()
self.assertEqual(Snapshot.objects.get(pk=s1.id).refSnapshot, None)
def test_snapshot_deletion_of_first_reference(self):
"""
Test that when first reference is deleted, other pictures have their references changed
Here,
S1 is a reference
S2 has a reference on S1
S3 has a reference on S1
After deletion of S1, S2 becomes a reference S3 should have reference on S2
"""
s1 = Snapshot(stepResult=self.tsr1, image=None, refSnapshot=None, pixelsDiff=None)
s1.save()
s2 = Snapshot(stepResult=self.tsr2, image=None, refSnapshot=s1, pixelsDiff=None)
s2.save()
s3 = Snapshot(stepResult=self.tsr2, image=None, refSnapshot=s1, pixelsDiff=None)
s3.save()
s1.delete()
self.assertEqual(Snapshot.objects.get(pk=s2.id).refSnapshot, None)
self.assertEqual(Snapshot.objects.get(pk=s3.id).refSnapshot, s2)