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#!/usr/bin/env python
from nose.tools import *
import networkx as nx
def test_valid_degree_sequence1():
n = 100
p = .3
for i in range(10):
G = nx.erdos_renyi_graph(n,p)
deg = list(G.degree().values())
assert_true( nx.is_valid_degree_sequence(deg, method='eg') )
assert_true( nx.is_valid_degree_sequence(deg, method='hh') )
def test_valid_degree_sequence2():
n = 100
for i in range(10):
G = nx.barabasi_albert_graph(n,1)
deg = list(G.degree().values())
assert_true( nx.is_valid_degree_sequence(deg, method='eg') )
assert_true( nx.is_valid_degree_sequence(deg, method='hh') )
@raises(nx.NetworkXException)
def test_string_input():
a = nx.is_valid_degree_sequence([],'foo')
def test_negative_input():
assert_false(nx.is_valid_degree_sequence([-1],'hh'))
assert_false(nx.is_valid_degree_sequence([-1],'eg'))
assert_false(nx.is_valid_degree_sequence([72.5],'eg'))
def test_atlas():
for graph in nx.graph_atlas_g():
deg = list(graph.degree().values())
assert_true( nx.is_valid_degree_sequence(deg, method='eg') )
assert_true( nx.is_valid_degree_sequence(deg, method='hh') )
def test_small_graph_true():
z=[5,3,3,3,3,2,2,2,1,1,1]
assert_true(nx.is_valid_degree_sequence(z, method='hh'))
assert_true(nx.is_valid_degree_sequence(z, method='eg'))
z=[10,3,3,3,3,2,2,2,2,2,2]
assert_true(nx.is_valid_degree_sequence(z, method='hh'))
assert_true(nx.is_valid_degree_sequence(z, method='eg'))
z=[1, 1, 1, 1, 1, 2, 2, 2, 3, 4]
assert_true(nx.is_valid_degree_sequence(z, method='hh'))
assert_true(nx.is_valid_degree_sequence(z, method='eg'))
def test_small_graph_false():
z=[1000,3,3,3,3,2,2,2,1,1,1]
assert_false(nx.is_valid_degree_sequence(z, method='hh'))
assert_false(nx.is_valid_degree_sequence(z, method='eg'))
z=[6,5,4,4,2,1,1,1]
assert_false(nx.is_valid_degree_sequence(z, method='hh'))
assert_false(nx.is_valid_degree_sequence(z, method='eg'))
z=[1, 1, 1, 1, 1, 1, 2, 2, 2, 3, 4]
assert_false(nx.is_valid_degree_sequence(z, method='hh'))
assert_false(nx.is_valid_degree_sequence(z, method='eg'))
def test_iterable():
G = nx.path_graph(4)
seq = iter(G.degree().values())
assert_true(nx.is_valid_degree_sequence(seq, method='hh'))
assert_true(nx.is_valid_degree_sequence(seq, method='eg'))
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