def test_default():
content = """2 2
1 2 5
1 2 -5
""".splitlines()
adj_m = parse_in(content=content)
dist = answer_func(adj_m)
expect = 5
assert expect == dist
def test_bad():
content = """5 5
1 2 2
2 3 1
1 3 1
1 1 -1
5 4 10
""".splitlines()
adj_m = parse_in(content=content)
dist = answer_func(adj_m)
expect = ":("
assert expect == dist
def test_minus():
content = """5 5
1 5 -4
1 2 -2
2 3 -1
1 3 -1
3 5 -6
5 4 -10
""".splitlines()
adj_m = parse_in(content=content)
dist = answer_func(adj_m)
expect = -4
assert expect == dist
def test_plus():
content = """5 5
1 5 4
1 2 2
2 3 1
1 3 1
3 5 6
5 4 10
""".splitlines()
adj_m = parse_in(content=content)
dist = answer_func(adj_m)
expect = 9
assert expect == dist