Fix CI failure by using non-interactive Matplotlib backend (Agg) in tests#569
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vasanthkumargr wants to merge 5 commits intodswah:mainfrom
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Fix CI failure by using non-interactive Matplotlib backend (Agg) in tests#569vasanthkumargr wants to merge 5 commits intodswah:mainfrom
vasanthkumargr wants to merge 5 commits intodswah:mainfrom
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added 5 commits
March 31, 2026 19:16
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This PR resolves a CI issue where the test_cake_data_in_one test in test_gen_imgs.py attempts to open a Tkinter display window when gen_imgs.cake_data_in_one() calls plt.figure().
In headless environments (such as GitHub Actions), GUI backends like Tk are unavailable. This caused the test suite to fail or hang due to the attempt to create a display window.
Changes Made
Configured Matplotlib to use the non-interactive Agg backend at the beginning of the test file.
This ensures plots are rendered off-screen without requiring a display server.
Fixes test failures in headless CI environments.
Maintains existing test logic and coverage.
Improves reliability and portability of the test suite.