The code organization goes as follows:
backend: Additional unified tensor interface for supported frameworks. The functions there are only used in unit tests, not DGL itself. Note that the code there are not unit tests by themselves.compute: All framework-agnostic computation-related unit tests go there.${DGLBACKEND}(e.g.pytorchandmxnet): All framework-specific computation-related unit tests go there.graph_index: All unit tests for C++ graph structure implementation go there. The Python API being tested in this directory, if any, should be as minimal as possible (usually simple wrappers of corresponding C++ functions).lint: Pylint-related files.scripts: Automated test scripts for CI.