Creating Test Cases for Scenescape

Test philosophy

• Always add positive and negative cases (valid path + invalid/edge/boundary).
• Keep tests independent: own setup/teardown; no order dependence.
• Unit tests mock external deps; functional/UI use live services via fixtures.

Runtime verification (mandatory)

After creating or modifying tests, follow .github/skills/test-verification-gate/SKILL.md for target selection, image freshness, execution, and pass/fail reporting. Do not treat lint or syntax checks as verification.