def test_start_end(self, start_end):
graph = start_end
dot = Gv(graph).run(format='canon')
result = equalize(dot)
assert result == equalize(r'''
digraph {
node [label="\N"];
start -> end;
}
''')
def test_tojson(self, start_end):
json = Gv(start_end).tojson()
assert False
def test_todot(self, start_end):
dot = Gv(start_end).todot()
assert 'digraph {' in dot
assert 'start -> end' in dot
def test_tosvg(self, start_end):
svg = Gv(start_end).tosvg()
assert isinstance(svg, ET.Element)
assert svg.tag.endswith('}svg')
def test_graphviz_not_found(self, start_end, monkeypatch):
monkeypatch.setattr(Gv, 'path', [])
with pytest.raises(FileNotFoundError):
Gv(start_end).run()
def test_wrong_format(self, start_end):
with pytest.raises(ValueError) as err:
Gv(start_end).run(format='?')
assert "Wrong '?' format" in str(err.value)
def test_formats(self):
assert Gv().formats()[:2] == 'bmp canon'.split()
def test_empty_graph(self):
assert Gv().dot() == ''