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import pygraphviz as pgv
import pytest
stringify = pgv.testing.stringify
def test_name():
A = pgv.AGraph(name="")
assert stringify(A) == "strict graph { }"
assert A.__repr__()[0:7] == "<AGraph"
def test_string_representation_small():
A = pgv.AGraph(name="test")
A.add_path([1, 2])
assert stringify(A) == "strict graph test { 1 -- 2; }"
def test_string_representation_large():
A = pgv.AGraph(name="test graph")
A.add_path([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
A.add_node(11)
ans = """strict graph "test graph" {
1 -- 2;
2 -- 3;
3 -- 4;
4 -- 5;
5 -- 6;
6 -- 7;
7 -- 8;
8 -- 9;
9 -- 10;
11; }"""
assert stringify(A) == " ".join(ans.split())
def test_bad_dot_input():
with pytest.raises(pgv.DotError):
A = pgv.AGraph(string="graph {1--1")
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