Concerning testing `visualize(::AtomGraph)`

[jonathanmfung]

Re:

AtomGraphs.jl/test/AtomGraph_tests.jl

Line 96 in 79acbcd

# TODO: figure out a way to test visualize_graph itself?

GraphPlot.jl relies on VisualRegressionTests.jl to do their image testing.

This could be a potential way to implement these tests. However, in my experience, using visualize(::AtomGraph) produces graphs at random rotations. I believe this is caused by gplot's default layout function.

As I'm not familiar with graphs, I'm not sure which layout function would best suit this atomic context. It seems that circular_layout, shell_layout, and spectral_layout are deterministic.