[Contract] — Test: `close_market` by non-creator and non-admin is rejected

[Olowodarey]

Background

market::close_market should only be callable by the market creator or the
admin. The market tests do not include a test for an unauthorized third party
attempting to close a market.

Goal

Add tests in tests/market_tests.rs for the authorization paths.

Tasks

1. Create a market; attempt close_market from a random third-party address;
2. Call close_market from the market creator; assert success
3. Call close_market from the admin on a different market (not created by

Acceptance Criteria

• Random addresses cannot close markets.
• Creator and admin can both close.

Files

contracts/open-market/tests/market_tests.rs.

[Tobi-8]

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[chisomvictorcv-sketch]

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[dotunv]

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