test: skip tests when optional dependencies are not installed #120 #181
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check whether optional dependencies (i.e., networkx and scipy) are installed before running tests that use them
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Check whether optional dependencies (i.e., networkx and scipy) are installed before running tests that use them. Fixes #120.
Moved the SciPy wrapper tests from the main algorithm test class to a dedicated
algorithm_scipy_wrapper_testsclass for better organization. If SciPy is not installed, it only skips the test cases that need SciPy, while the rest of the algorithm_tests are not skipped.Moved the handling of the optional
networkxdependency infree_form_test_caseto check if the package is present before callingfree_form(). If the package is not present, it skips the test.