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import pytest
import networkx as nx
def test_tikz_attributes():
G = nx.path_graph(4, create_using=nx.DiGraph)
pos = {n: (n, n) for n in G}
G.add_edge(0, 0)
G.edges[(0, 0)]["label"] = "Loop"
G.edges[(0, 0)]["label_options"] = "midway"
G.nodes[0]["style"] = "blue"
G.nodes[1]["style"] = "line width=3,draw"
G.nodes[2]["style"] = "circle,draw,blue!50"
G.nodes[3]["label"] = "Stop"
G.edges[(0, 1)]["label"] = "1st Step"
G.edges[(0, 1)]["label_options"] = "near end"
G.edges[(2, 3)]["label"] = "3rd Step"
G.edges[(2, 3)]["label_options"] = "near start"
G.edges[(2, 3)]["style"] = "bend left,green"
G.edges[(1, 2)]["label"] = "2nd"
G.edges[(1, 2)]["label_options"] = "pos=0.5"
G.edges[(1, 2)]["style"] = ">->,bend right,line width=3,green!90"
output_tex = nx.to_latex(
G,
pos=pos,
as_document=False,
tikz_options="[scale=3]",
node_options="style",
edge_options="style",
node_label="label",
edge_label="label",
edge_label_options="label_options",
)
expected_tex = r"""\begin{figure}
\begin{tikzpicture}[scale=3]
\draw
(0, 0) node[blue] (0){0}
(1, 1) node[line width=3,draw] (1){1}
(2, 2) node[circle,draw,blue!50] (2){2}
(3, 3) node (3){Stop};
\begin{scope}[->]
\draw (0) to node[near end] {1st Step} (1);
\draw[loop,] (0) to node[midway] {Loop} (0);
\draw[>->,bend right,line width=3,green!90] (1) to node[pos=0.5] {2nd} (2);
\draw[bend left,green] (2) to node[near start] {3rd Step} (3);
\end{scope}
\end{tikzpicture}
\end{figure}"""
assert output_tex == expected_tex
# print(output_tex)
# # Pretty way to assert that A.to_document() == expected_tex
# content_same = True
# for aa, bb in zip(expected_tex.split("\n"), output_tex.split("\n")):
# if aa != bb:
# content_same = False
# print(f"-{aa}|\n+{bb}|")
# assert content_same
def test_basic_multiple_graphs():
H1 = nx.path_graph(4)
H2 = nx.complete_graph(4)
H3 = nx.path_graph(8)
H4 = nx.complete_graph(8)
captions = [
"Path on 4 nodes",
"Complete graph on 4 nodes",
"Path on 8 nodes",
"Complete graph on 8 nodes",
]
labels = ["fig2a", "fig2b", "fig2c", "fig2d"]
latex_code = nx.to_latex(
[H1, H2, H3, H4],
n_rows=2,
sub_captions=captions,
sub_labels=labels,
)
# print(latex_code)
assert "begin{document}" in latex_code
assert "begin{figure}" in latex_code
assert latex_code.count("begin{subfigure}") == 4
assert latex_code.count("tikzpicture") == 8
assert latex_code.count("[-]") == 4
def test_basic_tikz():
expected_tex = r"""\documentclass{report}
\usepackage{tikz}
\usepackage{subcaption}
\begin{document}
\begin{figure}
\begin{subfigure}{0.5\textwidth}
\begin{tikzpicture}[scale=2]
\draw[gray!90]
(0.749, 0.702) node[red!90] (0){0}
(1.0, -0.014) node[red!90] (1){1}
(-0.777, -0.705) node (2){2}
(-0.984, 0.042) node (3){3}
(-0.028, 0.375) node[cyan!90] (4){4}
(-0.412, 0.888) node (5){5}
(0.448, -0.856) node (6){6}
(0.003, -0.431) node[cyan!90] (7){7};
\begin{scope}[->,gray!90]
\draw (0) to (4);
\draw (0) to (5);
\draw (0) to (6);
\draw (0) to (7);
\draw (1) to (4);
\draw (1) to (5);
\draw (1) to (6);
\draw (1) to (7);
\draw (2) to (4);
\draw (2) to (5);
\draw (2) to (6);
\draw (2) to (7);
\draw (3) to (4);
\draw (3) to (5);
\draw (3) to (6);
\draw (3) to (7);
\end{scope}
\end{tikzpicture}
\caption{My tikz number 1 of 2}\label{tikz_1_2}
\end{subfigure}
\begin{subfigure}{0.5\textwidth}
\begin{tikzpicture}[scale=2]
\draw[gray!90]
(0.749, 0.702) node[green!90] (0){0}
(1.0, -0.014) node[green!90] (1){1}
(-0.777, -0.705) node (2){2}
(-0.984, 0.042) node (3){3}
(-0.028, 0.375) node[purple!90] (4){4}
(-0.412, 0.888) node (5){5}
(0.448, -0.856) node (6){6}
(0.003, -0.431) node[purple!90] (7){7};
\begin{scope}[->,gray!90]
\draw (0) to (4);
\draw (0) to (5);
\draw (0) to (6);
\draw (0) to (7);
\draw (1) to (4);
\draw (1) to (5);
\draw (1) to (6);
\draw (1) to (7);
\draw (2) to (4);
\draw (2) to (5);
\draw (2) to (6);
\draw (2) to (7);
\draw (3) to (4);
\draw (3) to (5);
\draw (3) to (6);
\draw (3) to (7);
\end{scope}
\end{tikzpicture}
\caption{My tikz number 2 of 2}\label{tikz_2_2}
\end{subfigure}
\caption{A graph generated with python and latex.}
\end{figure}
\end{document}"""
edges = [
(0, 4),
(0, 5),
(0, 6),
(0, 7),
(1, 4),
(1, 5),
(1, 6),
(1, 7),
(2, 4),
(2, 5),
(2, 6),
(2, 7),
(3, 4),
(3, 5),
(3, 6),
(3, 7),
]
G = nx.DiGraph()
G.add_nodes_from(range(8))
G.add_edges_from(edges)
pos = {
0: (0.7490296171687696, 0.702353520257394),
1: (1.0, -0.014221357723796535),
2: (-0.7765783344161441, -0.7054170966808919),
3: (-0.9842690223417624, 0.04177547602465483),
4: (-0.02768523817180917, 0.3745724439551441),
5: (-0.41154855146767433, 0.8880106515525136),
6: (0.44780153389148264, -0.8561492709269164),
7: (0.0032499953371383505, -0.43092436645809945),
}
rc_node_color = {0: "red!90", 1: "red!90", 4: "cyan!90", 7: "cyan!90"}
gp_node_color = {0: "green!90", 1: "green!90", 4: "purple!90", 7: "purple!90"}
H = G.copy()
nx.set_node_attributes(G, rc_node_color, "color")
nx.set_node_attributes(H, gp_node_color, "color")
sub_captions = ["My tikz number 1 of 2", "My tikz number 2 of 2"]
sub_labels = ["tikz_1_2", "tikz_2_2"]
output_tex = nx.to_latex(
[G, H],
[pos, pos],
tikz_options="[scale=2]",
default_node_options="gray!90",
default_edge_options="gray!90",
node_options="color",
sub_captions=sub_captions,
sub_labels=sub_labels,
caption="A graph generated with python and latex.",
n_rows=2,
as_document=True,
)
assert output_tex == expected_tex
# print(output_tex)
# # Pretty way to assert that A.to_document() == expected_tex
# content_same = True
# for aa, bb in zip(expected_tex.split("\n"), output_tex.split("\n")):
# if aa != bb:
# content_same = False
# print(f"-{aa}|\n+{bb}|")
# assert content_same
def test_exception_pos_single_graph(to_latex=nx.to_latex):
# smoke test that pos can be a string
G = nx.path_graph(4)
to_latex(G, pos="pos")
# must include all nodes
pos = {0: (1, 2), 1: (0, 1), 2: (2, 1)}
with pytest.raises(nx.NetworkXError):
to_latex(G, pos)
# must have 2 values
pos[3] = (1, 2, 3)
with pytest.raises(nx.NetworkXError):
to_latex(G, pos)
pos[3] = 2
with pytest.raises(nx.NetworkXError):
to_latex(G, pos)
# check that passes with 2 values
pos[3] = (3, 2)
to_latex(G, pos)
def test_exception_multiple_graphs(to_latex=nx.to_latex):
G = nx.path_graph(3)
pos_bad = {0: (1, 2), 1: (0, 1)}
pos_OK = {0: (1, 2), 1: (0, 1), 2: (2, 1)}
fourG = [G, G, G, G]
fourpos = [pos_OK, pos_OK, pos_OK, pos_OK]
# input single dict to use for all graphs
to_latex(fourG, pos_OK)
with pytest.raises(nx.NetworkXError):
to_latex(fourG, pos_bad)
# input list of dicts to use for all graphs
to_latex(fourG, fourpos)
with pytest.raises(nx.NetworkXError):
to_latex(fourG, [pos_bad, pos_bad, pos_bad, pos_bad])
# every pos dict must include all nodes
with pytest.raises(nx.NetworkXError):
to_latex(fourG, [pos_OK, pos_OK, pos_bad, pos_OK])
# test sub_captions and sub_labels (len must match Gbunch)
with pytest.raises(nx.NetworkXError):
to_latex(fourG, fourpos, sub_captions=["hi", "hi"])
with pytest.raises(nx.NetworkXError):
to_latex(fourG, fourpos, sub_labels=["hi", "hi"])
# all pass
to_latex(fourG, fourpos, sub_captions=["hi"] * 4, sub_labels=["lbl"] * 4)
def test_exception_multigraph():
G = nx.path_graph(4, create_using=nx.MultiGraph)
G.add_edge(1, 2)
with pytest.raises(nx.NetworkXNotImplemented):
nx.to_latex(G)
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