Don't throw error when there are no nodes #381
Merged
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This PR updates the process of graph data validation so that including at least a node is no longer mandatory.
If the user forgets to pass at least a node (or sets an empty node array in purpose) to the
Graph
component, they will not get an exception. Instead, a warning message will be displayed on console just to make them aware that they haven't added any node, in case they're not aware of it.Tests have been updated to check this new logic.
Should resolve #347.