def test_merging_correct(self):
# two BGEdges can be merged together into a third, separate BGEdge
# that would contain information from both supplied BGEdges in terms of colors and multiplicities
# such merge is allowed only if a pair of vertices in both BGEdges is the same
# ordering of vertices if not a concern, since edges in BreakpointGraph are not directed
v1 = BlockVertex("v1")
v2 = BlockVertex("v2")
multicolor = Multicolor(self.genome3)
multicolor1 = Multicolor(self.genome2)
edge1 = BGEdge(vertex1=v1, vertex2=v2, multicolor=multicolor)
edge2 = BGEdge(vertex1=v1, vertex2=v2, multicolor=multicolor1)
merged_edge = BGEdge.merge(edge1, edge2)
self.assertEqual(merged_edge.vertex1, v1)
self.assertEqual(merged_edge.vertex2, v2)
self.assertEqual(merged_edge.multicolor, multicolor + multicolor1)
def test_merging_incorrect(self):
# cases when vertices in two supplied for the merging edges are not consistent
v1 = BlockVertex("v1")
v2 = BlockVertex("v2")
v3 = BlockVertex("v3")
v4 = BlockVertex("v4")
multicolor = Multicolor(self.genome3)
multicolor1 = Multicolor(self.genome2)
edge1 = BGEdge(vertex1=v1, vertex2=v2, multicolor=multicolor)
edge2 = BGEdge(vertex1=v1, vertex2=v3, multicolor=multicolor1)
with self.assertRaises(ValueError):
BGEdge.merge(edge1, edge2)
edge2 = BGEdge(vertex1=v3, vertex2=v2, multicolor=multicolor1)
with self.assertRaises(ValueError):
BGEdge.merge(edge1, edge2)
edge2 = BGEdge(vertex1=v3, vertex2=v4, multicolor=multicolor1)
with self.assertRaises(ValueError):
BGEdge.merge(edge1, edge2)
edge2 = BGEdge(vertex1=v1, vertex2=v1, multicolor=multicolor1)
with self.assertRaises(ValueError):
BGEdge.merge(edge1, edge2)
edge2 = BGEdge(vertex1=v2, vertex2=v2, multicolor=multicolor1)
with self.assertRaises(ValueError):
BGEdge.merge(edge1, edge2)
edge2 = BGEdge(vertex1=v3, vertex2=v1, multicolor=multicolor1)
with self.assertRaises(ValueError):
BGEdge.merge(edge1, edge2)
