Test OSV update ecosystems (#4100) #5069
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This PR adds a mock-based unit test for the update_ecosystems method in OSV_Source, ensuring it correctly detects valid ecosystems when gsutil responses are mocked. This improves test coverage for the OSV data source and verifies ecosystem parsing logic in isolation from the actual network.
This contributes to the broader effort discussed in [Issue #4100]: Adding alternative vulnerability data sources. While this test doesn't implement new sources, it lays groundwork for robust testing around OSV integration and will help validate any future improvements to its logic.
My earlier PR accidentally showed "0 lines changed" because I forgot to properly stage and commit the updated test file before pushing. This PR fixes that (I hope).